68RFE
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Part #
Reference #
Repair kits
Qty
OH 68RFE 07-up w/pistons Transtec
- Part #
- DP2543
- Reference #
- 72002CFP
- Extra information
- Transtec
OH 68RFE 07-up w/pistons Precision
- Part #
- KP13900B
- Reference #
- 72002CFP
- Extra information
OH 68RFE 07-up w/o pistons Transtec
- Part #
- DP2544
- Reference #
- 72002CFX
- Extra information
- Transtec
Frictionpack High Performance 68RFE Rayb
- Part #
- RCPTK-6800
- Reference #
- 72119CHP
- Extra information
CHRYSLER
68RFE GPZ TORQKIT CLUTCH PACK
2007-ON
Part No.RCPTK-6800Raybestos® Powertrain Chrysler 68RFE Complete Set Torqkit features multiple torqkits and friction module, and ZPAK. With an enhanced shift feel, increased torque capacity, and smooth engagements Raybestos Powertrain dropin Torqkits are designed to help tear up the drag strip, bust through the mud, and pull towards success. Instructions are included.
Recommended Use:
High-stress diesel or towing applications with increased horsepower and torque
Shiftkit 45RFE-545-68RFE 99-18
- Part #
- T72165
- Reference #
- 72165
- Extra information
Fits 1999-2011 3.7L - 4.7L - 5.7L . 45RFE, 545RFE and 68RFE Addresses 2-3 Neutral, Drainback, Limp mode, Torque Converter Clutch slide bang and TCC slip codes.
Includes: Heavy Duty accumulator plate/cover and special accumulator seals. Has tough snap ring for input drum.
Includes new Torque converter limit valve system for pump saving cost of new pump.
NOTE: SK 45RFE and 45RFE-HD2 do not make firm or performance type shifts. Both kits produce a "quicker shift" which is the transition time from the release and or apply of the present gear to the next gear. Installation recommendation: Experienced technician Transmission removal necessary: No
SK45RFE
Part #
Reference #
Filters
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Filter 45RFE, 68RFE 4WD
- Part #
- 92716
- Reference #
- 72010AD
- Extra information
- OEM Number(s): 05013470AE replaced below OEs 05013470AA 05013470AB 05013470AC 05013470AD 4799507
Part #
Reference #
Transmission Fluid
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Transmission Fluid Chrysler 1 Liter
- Part #
- TG0011
- Reference #
- TG0011
- Extra information
Performance
ATF+3, ATF+4
Daimler Chrysler MS-7176 en MS-9602
Transmission Fluid Chrysler DRUM 60L
- Part #
- TG0611
- Reference #
- TG0611
- Extra information
Performance
ATF+3, ATF+4
Daimler Chrysler MS-7176 en MS-9602
Part #
Reference #
Valvebody Components / Transmission Specialties
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Accumulator Piston 45RFE, 68RFE
- Part #
- 44894-01K
- Reference #
- Extra information
- Accumulator piston scuffing and bore wear are common issues in Chrysler 45RFE, 545RFE, 65RFE, 66RFE and 68RFE valve bodies, especially when running increased pressures. The OE accumulator pistons have two seal rings. The seal groove at the open end of the piston is a larger diameter, with the seal ring acting as a guide to prevent piston-to-bore contact.The seal groove at the closed end of the piston is a smaller diameter and the seal ring acts as a conventional seal. However, due to the smaller seal groove diameter, the piston will contact the bore when side-loaded resulting in scuffing, wear and leakage of clutch apply pressure.Sonnax accumulator piston kit 44894-01K features two guide seal rings, one at each end of the piston to prevent piston-to-bore scuffing when side loaded. Additionally, the oil sealing ring location is relocated on the piston allowing it to run in an un-worn portion of the bore enabling bores with moderate scuffing to be salvaged. Manufactured from 6061 billet aluminum, these pistons will upgrade late model applications with plastic pistons to prevent transmission failure due to piston breakage.• Dual-guide seals prevent piston-to-bore scuffing
• Updated seal location allows use in scuffed bores
• Prevents transmission failure from broken plastic pistonsContents• Piston• Guide Seals (2)• Seal, scarf-cut
Accumulator Piston Kit 45RFE, 68RFE
- Part #
- 44894-01MK
- Reference #
- Extra information
Accumulator Piston Kit
Part No. 44894-01MKAccumulator piston scuffing and bore wear are common issues in Chrysler 45RFE, 545RFE, 65RFE, 66RFE and 68RFE valve bodies, especially when running increased pressures. The OE accumulator pistons have two seal rings. The seal groove at the open end of the piston is a larger diameter, with the seal ring acting as a guide to prevent piston-to-bore contact. The seal groove at the closed end of the piston is a smaller diameter and the seal ring acts as a conventional seal. However, due to the smaller seal groove diameter, the piston will contact the bore when side-loaded resulting in scuffing, wear and leakage of clutch apply pressure.
Each piston in the Sonnax accumulator piston kit 44894-01MK features two guide seal rings, one at each end of the piston to prevent piston-to-bore scuffing when side loaded. Additionally, the oil sealing ring location is relocated on the piston allowing it to run in an un-worn portion of the bore enabling bores with moderate scuffing to be salvaged. Manufactured from 6061 billet aluminum, these pistons will upgrade late model applications with plastic pistons to prevent transmission failure due to piston breakage.
- Dual-guide seals prevent piston-to-bore scuffing
- Updated seal location allows use in scuffed bores
- Prevents transmission failure from broken plastic pistons
- Pistons (5)
- Guide Seals (10) PTFE, Solid
- Seals (5) PTFE, Scarf Cut
Press.reg.valve Oversize 45RFE,68RFE
- Part #
- 44912-15K
- Reference #
- Extra information
- Needs Tool F-44912-TL10
Press.reg.valve Luber 45RFE,68RFE
- Part #
- 44912-17K
- Reference #
- Extra information
- Regulator Valve Part No. 44912-17K Vehicles equipped with Chrysler 45RFE, 545RFE, 65RFE, 66RFE and 68RFE transmissions can develop low cooler flow at idle and/or overheated fluid issues after performing aftermarket re-programming or 'tuning' the PCM/TCM for heavy duty use. Aftermarket programming typically commands a minimum of 100 psi at idle. When the pressure regulator valve is in this position the valve can restrict the connection to the converter circuits, resulting in low cooler flow, fluid overheating and converter crowding that can cause engine stall at idle. Installing the Sonnax drop-in lube regulated pressure regulator valve 44912-17K restores the fluid connection to the converter circuit at idle, which is especially important on tuned vehicles. This valve has an internal check valve that ensures proper converter and lube oil flow under extreme 'tuned' operating conditions, eliminating the fluid overheat and converter related engine stalls at idle. This check valve reseats properly to seal the converter at engine off, eliminating the delayed engagements and converter drainback issues that arise from the outdated technique of drilling a hole in the casting wall between line and lube circuits. Hardcoat anodized aluminum valve combats premature wear Charges the converter/lube circuits at low RPM, especially important in 'tuned' vehicles Improves converter feed/lube oil flow at critical low RPM and high load conditions Redesigned valve prevents fluid drainback & slow engagements Annular grooves help center valve in bore to reduce side-load wear Drop-in Zip Valve™ parts install quickly and easily
Pumpgear set Outer 68RFE
- Part #
- 72530B-04K
- Reference #
- Extra information
- Time, mileage and high pressure contribute to wear of the OE pump gears in Chrysler 68RFE transmissions. Replacement gears are not available from Chrysler to allow worn pumps to be rebuilt. Sonnax heavy duty outer pump gear set 72530B-04K includes two premium-quality, high-pressure gears with an anti-wear coating to ensure long life. Use in conjunction with center pump gear 72530B-02 to replace all three gears in the pump.
Snapring & Shimkit 45RFE, 68RFE
- Part #
- 72978-01K
- Reference #
- Extra information
- The 4C return spring retaining ring in Chrysler 45RFE, 545RFE, 65RFE, 66RFE and 68RFE transmissions is known to come unseated and pop off, resulting in transmission failure. To repair and prevent this problem, plus more easily tune 4C performance, Sonnax offers 4C retaining ring and shim kit 72978-01K with three essential parts for a reliable build. The custom G-Loc ring in the Sonnax kit mechanically holds the OE retaining ring in place to prevent it from popping out. The kit’s .078" thick clutch backing plate retaining ring makes it easier to achieve the 4C clearance specification of .030 to .055". Setting this clearance is difficult when OE selective backing plate retaining rings are not readily available. As a result, some builders use thinner steel plates, but this undermines the clutch pack’s ability to dissipate heat. The ring in the Sonnax kit is .010 " thinner than the ring most units have from the factory, allowing for more choices when setting clutch clearance. The spring pack shim in the kit gives the option slightly tune the 4C clutch to release more quickly. Combining the shim with the thinner backing plate retaining ring and setting clearance closer to the high end of spec will preload the return spring for increased force. The result is improved 4C to OD shift timing when more aggressive, quicker-applying OD clutch packs are used. Prevents 4C return spring retaining ring from popping off More options when setting clutch clearance Improves 4C to OD shift timing
Shiftkit 45RFE,68RFE High Pressure 2011-
- Part #
- RFE-5B-HP
- Reference #
- Extra information
Built for performance and designed for durability, TranGo’s new Tuneless Technology high pressure kits are compatible with all 45, 5-45, 65, 66 and 68RFE transmissions and includes everything you need to internally reprogram a more robust transmission capable of handling today’s aftermarket engine performance additions, such as tuners, chips or programmers.
TransGo RFE high pressure kits allow increased engine horsepower and torque via aftermarket tuners and other mods without the driveability side effects and cost associated with external transmission PCM programming. Included with the many performance and tow upgrades is an optional triple-disc converter calibration valve, for use with triple-disc converters to modulate the apply rate of the converter clutch, preventing harsh lockup engagement complaints without diminishing the increased holding power benefits.
High pressure without side effects
A re-engineered converter clutch charge system provides graduated TCC apply pressure increases with a built-in safety relief system to prevent converter ballooning. Re-calibrated pressure curve mirrors driver throttle position and torque demand, delivering shorter, cleaner shifts at all throttle openings without harsh or erratic shift feel and bind-ups. These patent-pending internally balanced calibrations provide progressive and seamless clutch apply pressure increases to 210 psi max, a 30% increase over the OEM 160 psi max.
For even greater overdrive clutch capacity, TransGo offers separately a hot-forged 1045 steel fully CNC overdrive pressure plate (part #RFE-PP-ODHP) allowing the addition of extra capacity to the OD stack in all models.
Corrects, Prevents, Reduces
- Friction failure when combined with aftermarket engine performance add-ons
- Soft, slipping or erratic shifting
- Over pressurization of the torque converter (ballooning)
- Harsh triple-disc converter apply
Includes:
TransGo® patent-pending components
- Recalibrated converter and pressure regulator systems
- Torque converter limit system
- Triple separator plate with gaskets
- Triple-disc converter calibration valve
Other calibration components
- Heavy duty accumulator plate
- Heavy duty snap ring for input drum
- Accumulator calibration components
Shiftkit 45RFE,68RFE High Press. 99-2010
- Part #
- RFE-7B-HP
- Reference #
- Extra information
Built for performance and designed for durability, TranGo’s new Tuneless Technology high pressure kits are compatible with all 45, 5-45, 65, 66 and 68RFE transmissions and includes everything you need to internally reprogram a more robust transmission capable of handling today’s aftermarket engine performance additions, such as tuners, chips or programmers.
TransGo RFE high pressure kits allow increased engine horsepower and torque via aftermarket tuners and other mods without the driveability side effects and cost associated with external transmission PCM programming. Included with the many performance and tow upgrades is an optional triple-disc converter calibration valve, for use with triple-disc converters to modulate the apply rate of the converter clutch, preventing harsh lockup engagement complaints without diminishing the increased holding power benefits.
High pressure without side effects
A re-engineered converter clutch charge system provides graduated TCC apply pressure increases with a built-in safety relief system to prevent converter ballooning. Re-calibrated pressure curve mirrors driver throttle position and torque demand, delivering shorter, cleaner shifts at all throttle openings without harsh or erratic shift feel and bind-ups. These patent-pending internally balanced calibrations provide progressive and seamless clutch apply pressure increases to 210 psi max, a 30% increase over the OEM 160 psi max.
For even greater overdrive clutch capacity, TransGo offers separately a hot-forged 1045 steel fully CNC overdrive pressure plate (part #RFE-PP-ODHP) allowing the addition of extra capacity to the OD stack in all models.
Corrects, Prevents, Reduces
- Friction failure when combined with aftermarket engine performance add-ons
- Soft, slipping or erratic shifting
- Over pressurization of the torque converter (ballooning)
- Harsh triple-disc converter apply
Includes:
TransGo® patent-pending components
- Recalibrated converter and pressure regulator systems
- Torque converter limit system
- Triple separator plate with gaskets
- Triple-disc converter calibration valve
Other calibration components
- Heavy duty accumulator plate
- Heavy duty snap ring for input drum
- Accumulator calibration components
TCC Regulator Valve Kit 45RFE, 68RFE
- Part #
- 44912-11K
- Reference #
- 72507
- Extra information
TCC Regulator Valve Kit
Part No. 44912-11KIn Chyrsler 45/545/65/66/68RFE transmissions, various converter concerns result from the OE design of the TCC regulator valve. There is minimal valve-to-bore sealing at the line pressure to converter feed circuit, which allows critical apply fluid to leak past the valve spool and directly to exhaust/sump. Typical cores show low vacuum at this critical TCC apply circuit and confirms the issue of poor valve to bore sealing.
Sonnax enhanced drop-in TCC regulator valve kit 44912-11K incoporates an extended spool for additional sealing support at the critical interface between the line pressure circuit and the TCC apply circuit. The Sonnax valve kit is designed as a quick and inexpensive repair for pumps showing initial signs of wear or as an preventative measure to extend the life of the pump. The kit also includes a sturdier accumulator spring retainer, as the OE retainer is often damaged from excess spring force.
- Hardcoat anodized aluminum valve combats premature wear
- Lengthened critical spool for additional sealing area and wear prevention
- Thicker accumulator spring retainer to replace thinner damaged OE accumulator spring retainer
- Drop-in repair that requires no tooling
- Valve
- Spring Retainer
Part #
Reference #
Frictions
Qty
Powerpack 45RFE, 68RFE UD/OD
- Part #
- 128755
- Reference #
- 72100AHPPK
- Extra information
- Adds more clutches in the UD/OD clutch for durability
Part #
Reference #
Pressure Plates
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Pressure Plate OD 45RFE, 68RFE HP
- Part #
- RFE-PP-ODHP
- Reference #
- 72140
- Extra information
Hot-Forged 1045 Steel Fully CNC Overdrive Pressure Plate allows the addition of extra capacity to the OD stack
Fits all 45, 5-45, 65, 66 and 68RFE gas and diesel OEM drums.
FEATURES
Easily add extra capacity to the OD stack in all models:
- Add 2 single sided OD frictions for a total of 14 (diesel) for a 15% gain
- Add 1 double sided OD friction for a total of 5 (gas) for a 25% gain
Pressure plate OD/REV 68RFE NLA
- Part #
- 72142B-01
- Reference #
- 72142B
- Extra information
- OD/Reverse 4-Lug Reaction Plate Part No. 72142B-01 OE Part No. 52119930AB Direct OE replacement OD/Reverse 4-lug reaction plate 72142B-01 for use in Chrysler 68RFE units.
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Reference #
Bushings
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Bushingkit 68RFE, 12 piece Sonnax
- Part #
- 72030-68K
- Reference #
- 72030C
- Extra information
- OE bushings in Chrysler 68RFE transmissions have a tendency to wear out prematurely due to suboptimal material composition. This wear can lead to bushing failure, harsh shifts, burnt clutches and gear ratio or solenoid codes. Sonnax bushing kit 72030-68K restores worry-free operation. Upgraded material composition outperforms OE bushings Superior wear characteristics eliminate premature deterioration
Bush Pumpgear Center 68RFE
- Part #
- 72530B-03
- Reference #
- 72507
- Extra information
Bush Pumpgear Center 68RFE
Center Pump Gear
- Material: Steel backed aluminum
- Bushing Style: Precision
Chrysler 68RFE pump bodies are frequently found to have a scored bearing surface or pump wear and fractures where the center gear drive flange passes through the pump. The Sonnax center pump gear 72530B-02 and/or bushing 72530B-03 salvages pumps with this type of wear. The score damage is machined out of the pump when the center pump gear bore is oversized to accept a precision, steel-backed aluminum bushing.
- Allows salvage of pump bodies scored at center gear bearing surface
- Redesigned center gear drive flange reduces turbine hub engagement play and noise
- The correctly installed steel-backed aluminum alloy precision bushing extends pump life
WARNING: Pumps with wear or damage to the face of the pump pocket cannot be repaired using these parts. Replace the pump.NOTE: Pumps with worn center pump gear bores must be machined to 2.172" +/- .0005" prior to bushing installation.
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Seals
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Gaskets
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Washers & Bearings
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Bearingkit 65RFE,66RFE 68RFE 2007-up
- Part #
- SBK-C18
- Reference #
- 72201C
- Extra information
Bearingkit 68RFE
- Input Support/Input Drum
- Underdrive Hub/Input Drum
- Underdrive Hub/Overdrive Hub
- Overdrive Hub/Reverse Hub
- Reaction Sun Gear to Reaction Carrier
- Reverse Hub to Center 2C/4CDrum Support
- 2C/4C Support to Reaction Annulus
- Reaction Carrier/Reverse Sun Gear to Reverse Carrier
- Output Shaft to L/R Clutch/Rear Case
- Reverse Planetary Carrier to Input Sun Gear
2007 & later
Part #
Reference #
Electrical Components
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Solenoid Block 45RFE04-up(White)68RFE
- Part #
- 72420A
- Reference #
- 72420
- Extra information
White connector 2004-
Retrofits 99-03 (black connector) when used with TRS Cam plate D72448
Also fits 2011-up grey connector
See also the bulletin, which you can download
OEM# 52119435AF, 68353383AB, 68002342AF
Line press. booster 45RFE- 68RFE 15-30 >
- Part #
- RFE-LB1
- Reference #
- 72761
- Extra information
Line Pressure Booster Kit Part No. RFE-LB1 Fits gas and diesel units.
Chrysler RFE transmissions have a unique, full range pressure transducer and real-time adaptive closed-loop pressure control system. Because of this, it is not possible to raise pressure in an RFE the same way you would in other transmissions.
The typical method of installing a stronger pressure regulator spring or larger boost valve will not work because the RFE control module will simply adapt and return pressure to OE specification. An electrical booster option is the only way to raise pressure on an RFE. Sonnax line pressure booster kit RFE-LB1 is an improved design over a simple resistor circuit.
Featuring an integrated chip (IC) circuit and a stronger pressure regulator spring, this new kit delivers 10 psi increase at lower pressure range and 25 psi increase at higher pressure ranges. Only Sonnax line pressure booster kits provide progressive pressure increase which gives you smooth engagements and lower load on the pump at idle, but a greater increase in pressure as the transmission is worked harder.
To find out more about how the kits work, and what results you can expect, see Achieving a Progressive Pressure Boost in RFEs. This kit is ideal for heavy duty and modified vehicles and even stock transmissions when a little extra pressure is desired.
• Achieve shorter shifts and increased torque capacity without creating low-speed harshness
• Improved clutch holding capacity for increased durability
•Progressive pressure increase as driving conditions become more demanding
• One kit fits both gas and diesel applications
Contents
• Pressure Regulator Spring • Wiring Harness with Connectors
Part #
Reference #
Sprags & One way clutches
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Sprag assembly 68RFE Low/Reverse
- Part #
- 140421AM
- Reference #
- 72644
- Extra information
- OEM 52119741AA
Part #
Reference #
Pistons
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Part #
Reference #
Hard Parts
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OD clutch shaft 66RFE, 68RFE
- Part #
- 72570-01
- Reference #
- Extra information
- 52119776AA
Pumpgear centergear only 68RFE
- Part #
- 72530B-02
- Reference #
- 72530
- Extra information
Center Pump Gear
Chrysler 68RFE pump bodies are frequently found to have a scored bearing surface or pump wear and fractures where the center gear drive flange passes through the pump. The Sonnax center pump gear 72530B-02 and/or bushing72530B-03 salvages pumps with this type of wear. The score damage is machined out of the pump when the center pump gear bore is oversized to accept a precision, steel-backed aluminum bushing.
- Allows salvage of pump bodies scored at center gear bearing surface
- Redesigned center gear drive flange reduces turbine hub engagement play and noise
- The correctly installed steel-backed aluminum alloy precision bushing extends pump life
WARNING:Inspect pump bore and pump pocket face below the center gear. Damaged bores can be corrected using center pump gear bushing 72530B-03. Damaged pockets cannot be repaired using these parts. Replace the pump.
OD clutch housing kit 45RFE, 68RFE
- Part #
- 72960-16K
- Reference #
- 72561
- Extra information
- Smart-Tech® Overdrive Clutch Housing Kit
Part No. 72960-16K
OE Part No: 68029262AA• Overdrive/Reverse Housing
• Bolt-On Anchor Plate
• Anchor Plate Shims (2)
• UD/OD Reaction Plate
• Adapter Sleeve
• Lip Seal
• Friction Clutch Plates (6)
• Steel Clutch Plates (5)
• Screws (12)
• Chisel Not shown
Dodge trucks pulling heavy loads or boosted to 400–600HP are at high risk for Overdrive burnup due to the stock transmission’s insufficient clutch capacity and fragile OE clutches.Even small amounts of heat and extra torque will push the thin (.034"), single-sided clutches over the edge, distorting the clutch pack. The fact is, any distortion of the clutch pack takes the clearance out of spec and makes overdrive clutch burnup inevitable.Keep hardworking trucks on the road with the Sonnax Smart-Tech® overdrive clutch housing kit 72960-06K.The unique billet aluminum housing holds a physically taller clutch pack and increases OD apply area by 16%. Plus, 2X thicker clutches increase clutch pack steel mass by 28% for unrivaled heat dissipation.This groundbreaking new kit is the only top-of-the-line upgrade that eliminates clutch problems without relying on valve body/pump modifications or adding the expense of extra components.Modified housing holds physically larger clutch pack for 20% more clutch capacity
2X Thicker steels and double-sided clutches increase steel mass by 28% for unrivaled heat dissipation
Bolt-on anchor plate eliminates clutch pack flexing and distortion that contribute to heat build-up 16% More OD apply area for firmer, more controlled shifts
Combine with Sonnax line pressure booster kit RFE-LB1 for even higher levels of performance.
WARNING: This kit requires use of the input clutch retainer found in '07-later units (OE part number 04799648AB). All 68RFE, 66RFE, 65RFE should have this retainer. For 45RFE and 545RFE '99-'06 applications, the input clutch retainer must be replaced with '07-later version. See instructions for retainer identification and verification measurements.
Input shaft 68RFE 11 3/4 "
- Part #
- 72670C
- Reference #
- 72670C
- Extra information
Heavy Duty Input Shaft
Part No. 72670B-01OE Part No. 68029247AA
Input shaft failure is common as power levels are increased in Chrysler 68RFE units. Sonnax heavy duty input shaft 72670B-01 is precision-engineered for unrivaled performance in high-horsepower gas and diesel applications. Machined from 300M ultra high-strength steel for exceptional toughness and manufactured with rolled turbine splines for resistance to spline-twist, the shaft also features a larger diameter at the cross holes for increased strength and resistance to fracture.
- Suitable for any high-horsepower street, towing or competition application
- Rolled splines for increased durability
- Specially heat-treated and processed for maximum toughness and straightness
- Manufactured from 300M ultra high-strength steel for maximum strength and resistance to fracture
- Includes checkball assembly and line-bored bushing
Part #
Reference #
Various
Qty
Cooler Bypass kit 45RFE,68RFE,ZF8HP
- Part #
- 72760-01K
- Reference #
- Extra information
Thermal Bypass Eliminator Kit
Part No. 72760-01KFor use in Chrysler/Jeep OE part numbers 52014762AA, 68186711AB, 68291739AA and 68210018AA.
The OE thermal bypass valve in listed units is known to get stuck in recirculation mode, only allowing fluid to circulate in the transmission and not allowing flow through the cooler. Sonnax thermal bypass eliminator kit 72760-01K allows reuse of the OE cooler block with the built-in pressure relief by removing the old OE thermal bypass valve and replacing it with a plug that permanently allows flow through the cooler.
- Drop-in Zip Valve™ parts install quickly and easily into OE cooler bypass valve
- Less expensive than replacing the OE cooler bypass valve
Cooler Bypass k.45RFE,68RFE,722.6,JF011E
- Part #
- 72760-02K
- Reference #
- Extra information
Thermal Bypass Eliminator Kit
Part No. 72760-02KFor use in Chrysler/Jeep OE part numbers 55111005AC and 68192000AA.
The OE thermal bypass valve in listed transmissions is known to get stuck in recirculation mode, only allowing ATF to circulate in the transmission and not allowing flow through the cooler. As the vehicle gets up to operating temperature, this can result in transmission overheat. Sonnax thermal bypass eliminator kit 72760-02K allows reuse of the OE cooler bypass valve by removing the OE thermal bypass valve and replacing it with a valve assembly that permanently allows flow through the cooler to prevent transmission overheat. The Sonnax design includes a pressure bypass feature that allows for bypass if the cooler is blocked, also preventing transmission failure.
- Drop-in Zip Valve™ parts install quickly and easily into OE cooler bypass valve
- Maintains the OE functionality of pressure relief to prevent transmission failure due to high pressure or cooler blockage
- Less expensive solution than replacing the OE cooler bypass valve