CD4E
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Repair kits
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OH CD4E Combo w/pistons Precision 93-02
- Part #
- NK70900V-MD
- Reference #
- 96002
- Extra information
Shift Correction pack CD4E Superior
- Part #
- KCD4E
- Reference #
- 96165
- Extra information
Product Description CD4E Kit Shift Correction Package
This valve body kit deals with these problems:
• TCC. shuttle or abort
• Runaway high pressure
• Better lube to problem areas
• Consistent reverse clutch apply
• Salvages worn valve bodies
• Improves overall performance
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Filters
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Valvebodies
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Valvebody Components / Transmission Specialties
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Sleeve Rev. drum CD4E
- Part #
- 73300-01
- Reference #
- Extra information
Sleeve Rev. drum CD4E
A soft reverse clutch drum journal can cause bushing failure and/or reverse clutch drum journal damage in Ford CD4E and Mazda LA4AEL units. To salvage drums with worn or damaged bushing journals, Sonnax offers reverse clutch drum sleeve 73300-01. This prehardened steel sleeve will extend the life of the reverse clutch drum bushing journal.
• Pre-hardened steel sleeve is precision machined
• More durable, wear-resistant bushing journal
Symptoms: - Bushing failure
- Costly drum replacement
- Damaged Reverse clutch drum journal
Cause:
A soft reverse clutch drum journal.
Correction:
Salvage damaged reverse clutch drums by machining and installing the Sonnax pre-hardened steel sleeve.
BYPASS clutch cntrol kit CD4E
- Part #
- 73840-BK
- Reference #
- Extra information
BYPASS clutch cntrol kit CD4E
- Bypass Clutch Valve
- Plunger Valve
- Bypass Clutch Sleeve
- Lubrication Plugs (4) 1 extra
- Plunger valve and oversized bypass clutch valve have extended spools for better support and annular grooves to prevent wear due to side loading
- Lubrication plugs increase lube and converter pressures by tapping into line pressure instead of depleting converter feed
- Plunger sleeve manufactured from highly wear-resistant aluminum
- Hardcoat anodized aluminum valves combat premature wear
NOTE: This kit cannot address high line pressure in the PR balance circuit, which can break up parts and reduce flow into the converter/cooler circuits. For information on that repair, see part number 73840-RK.Symptoms: - Bushing failure
- Code 628, 1744, 1740
- Loss of lube oil
- Planetary failure
- Reduced converter clutch life
Cause:
Casting bore wear at the bypass clutch valve and plunger sleeve wear allow converter apply and release pressure to exhaust.
Correction:
The Sonnax reamer restores the bypass clutch control bore while the OS valve re-establishes bore fit and extends life through additional spool support and annular grooves.
Required tool:
73840-BTL
Pressure Regulator Valve CD4E
- Part #
- 73840-RK
- Reference #
- Extra information
Pressure Regulator Valve CD4E
- Converter Regulator Valve
- Oversized Pressure Regulator Valve
- Lubrication Plugs (4) 1 extra
- Converter Regulator Spring
Sonnax oversized pressure regulator and converter regulator valve kit 73840-RK featires a converter regulator valve and PR valve which work together to limit converter pressure, yet ensure flow continues during a failsafe condition.
- Updated valves flow a safe regulated pressure into both the line and converter circuit, yet maintain control under low pump volume and high line conditions
- Improved line-to-lube circuit allows full-time cooler flow
- Includes an EPC pressure limit relief valve
- Redesigned converter regulator valve has a lengthened spool to eliminate cooler pressure loss
- Tapered spool design of the converter regulator valve ensures flow at extreme pressure
- Hardcoat anodized aluminum valves combat premature wear and feature annular grooves to prevent side loading
NOTE: This kit cannot address the loss of valve control at the converter bypass circuit. Wear at the bypass valve contributes to codes 628, 1740 and related converter slip codes. For information on that repair, see part number 73840-BK.
Symptoms: - Bushing failure
- Code 28, 1744, 1740
- Cracked drum
- High line pressure
- Loss of lube oil
- No cooler flow during failsafe
- Planetary failure
Cause:
Worn casting bores at the pressure regulator and converter regulator valves, and insufficient cooler and converter flow.
Correction:
The oversized PR valve restores the balance circuit to correct high line pressure and guards against excess EPC/TV pressure. The PR valve and converter regulator valve have modifications to properly regulate converter and cooler flow.
Bracket Connector CD4E
- Part #
- 73949-01
- Reference #
- Extra information
Bracket Connector CD4E
Reinstalling a rebuilt CD4E can be tricky when it comes time to connect the wiring harness, since the brittle plastic connector tabs are prone to breakage. Once that happens, the connector can be pushed into the case. To retrieve the connector you have to pull the pan and then struggle to hold the connector in place as you connect the wiring harness.
- Bracket connects to existing hardware inside the oil pan using existing bolts and holes.
- Holds connector firmly in place.
- Can be installed without having to remove solenoids or valve body.
- No modifications to transmission necessary.
Symptoms: - Broken retaining tabs on wiring harness connector
- Connector pushes into transmission case
Cause:
The plastic retention tabs that hold the wiring harness connector in place are easily broken. Once broken, the connector may push into the case.
Correction:
The Sonnax metal bracket positively supports the connector and prevents it from pushing into the case even if the plastic retention tabs are broken.
Shimkit CD4E
- Part #
- 73251-01K
- Reference #
- 96251-1K
- Extra information
Shimkit CD4E
- Shims .008" & .015" thick for #9 Bearing
- Shims (2) .005" & .010" thick for #13 Bearing
Contains 4 shims
Sonnax now offers a shim kit 73251-01K to adjust both the planet-to-drum endplay and the differential endplay. These shims offer a finer endplay adjustment than the OE selective washers, resulting in a more precise endplay setting.
Symptoms: - Excess endplay
- Lube failures
Cause:
The factory shims do not offer an adequate selection for proper endplay adjustment
Correction:
This shim kit offers a more precise endplay adjustment for the gear train and final drive.
Acc.pist CD4E 2-4
- Part #
- 73840-24
- Reference #
- 96935
- Extra information
Acc.pist CD4E 2-4
- Piston
- Spring White
- O-Rings (2)
- Rivet not shown
- Anodized aluminum pistons have two O-rings that prevent blow-by leakage
- Pistons have been dimensionally modified to stop in different axial locations to prevent them from hanging up or sticking on the previously worn bore edges
- Modified replacement springs are included to fit the smaller piston pocket
- Kits available for 2-4, low/reverse and forward locations
Symptoms: - 1-2 Bump
- 3-4 Bump
- Harsh shifts
- Soft shifts
Cause:
Accumulator bore wear and/or piston sticking.
Correction:
Prevent leakage of worn valve body castings with this O-ringed accumulator piston and spring kit.
Acc.pist. L/R CD4E
- Part #
- 73840-LR
- Reference #
- 96945
- Extra information
Accumulator piston L/R CD4E
- iston
- Spring Purple
- Spring Pink
- Spring Black
- O-Rings (2)
- Rivet not shown
CD4E transmissions may exhibit such problems as harsh engagements, and/or soft or harsh shifting, particularly from first to second gear. These complaints can be due to worn or out-of-round accumulator bores and/or pistons sticking in the bore. Sonnax offers an accumulator piston kit 73840-24 for the 2-4 piston, 73840-LR for low/reverse and 73840-FWD for forward.
- Anodized aluminum pistons have two O-rings that prevent blow-by leakage
- Pistons have been dimensionally modified to stop in different axial locations to prevent them from hanging up or sticking on the previously worn bore edges
- Modified replacement springs are included to fit the smaller piston pocket
- Kits available for 2-4, low/reverse and forward locations
Symptoms: - Delayed Reverse
- Harsh Reverse
- Soft Reverse
Cause:
Accumulator bore wear and/or piston sticking.
Correction:
Prevent leakage of worn valve body castings with this O-ringed accumulator piston and spring kit.
Acc.pist. Forw.CD4E
- Part #
- 73840-FWD
- Reference #
- 96950
- Extra information
Acc.pist. Forw.CD4E
- Piston
- Spring Red
- Spring Blue
- O-Rings (2)
- Rivet
Symptoms: - Delayed Forward
- Harsh Forward
- Soft Forward
Cause:
Accumulator bore wear and/or piston sticking.
Correction:
Prevent leakage of worn valve body castings with this O-ringed accumulator piston and spring kit.
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Frictions
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Steels
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Bands
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Pressure Plates
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Bushings
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Seals
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Gaskets
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Washers & Bearings
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Bearingkit CD4E
- Part #
- SBK-F18
- Reference #
- 96201A
- Extra information
Bearingkit CD4E
- Pump Support to Clutch Hub
- Clutch Hub to Low/Internal Sun
- Low/Internal Sun Gear to Low/Internal Carrier
- Low/Internal Carrier to Low/Internal Carrier
- Low/Internal Ring to Internal/OD/Reverse Sun
- Internal/Overdrive/Reverse Carrier to Ring
- Driven Sprocket to Case
- Driven Sprocket to Final Drive Carrier
- Final Drive Carrier to Case
1992 & later
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Electrical Components
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Sprags & One way clutches
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Pistons
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2-4 piston CD4E 1 groove w/clip 94-up
- Part #
- 85528A
- Reference #
- 96903AK
- Extra information
2/4 pist.CD4E 97- no groove no clip
- Part #
- 3854328
- Reference #
- 96903CK
- Extra information
2/4 pist.CD4E 97- 1 groove no clip
- Part #
- 3854314
- Reference #
- 96903DK
- Extra information
2-4 piston CD4E NO groove w/clip 94-up
- Part #
- 96903K
- Reference #
- 96903K
- Extra information
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Hard Parts
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Spring Servo return CD4E
- Part #
- 73708
- Reference #
- Extra information
Servo Return Spring
Partnr. 73708
Fits '94-'08 except applications with the shorter spring.
In Ford CD4E and Mazda LA4A-EL units, low pressure, servo leakage and/or pin bore wear can all cause a degradation of the servo timing and apply rate of the direct clutch in CD4E transmissions. Sonnax reduced force servo return spring 73708 to addresses these problems.
• Replacement spring provides enough force to firmly apply the 2-4 band, yet is not overly stiff so that a controlled release is allowed
• Spring will work with both the one-piece or two-piece servo piston and rod assembly
Symptoms:
• 1-2 Soft• 3-4 Soft• 2-3 FlareCause:
The servo timing and apply rate of the direct clutch become poor due to low pressure, servo leakage and/or pin bore wear.
Correction:
Installation of Sonnax servo return spring will slow the release of the band on a 2-3, yet allow quicker servo travel on reapplication. This results in shorter shifts throughout.
Note:
This spring will shorten shift duration, but is not a fix for leakage, a weak pump or poor line rise. Always verify the hydraulics by testing line pressure first.
Pumpgears CD4E
- Part #
- 73426-SP
- Reference #
- 96530
- Extra information
Pump Gear Set
Partnr. 73426-SP
Standard Size
Contents:
• Outer Gear
• Inner Gear
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Tools
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Valvekit CD4E Master
- Part #
- 73840-MK
- Reference #
- Extra information
Valvekit CD4E Master
The CD4E transmission frequently exhibits such symptoms as lube failure, harsh shifts and line pressure instability as well as a variety of TCC Lockup issues. Sonnax master kit 73840-MK contains both the Regulator Kit 73840-RKand the Bypass Kit 73840-BK to address issues in both areas. See the individual kits for more detail.
Both the Regulator and Bypass Kits require reaming for installation. See options below:
- Use 73840-BTL & 73840-RTL or
- Use 73840-BTL & F-73840-TL & VB-FIX
Symptoms: - Bushing failure
- Code 28, 1744, 1740
- Cracked drum
- High line pressure
- Loss of lube oil
- No cooler flow during failsafe
- Planetary failure
Cause:
Worn casting bores at the pressure regulator and converter regulator valves, and insufficient cooler and converter flow.
Correction:
The oversized PR valve restores the balance circuit to correct high line pressure and guards against excess EPC/TV pressure. The PR valve and converter regulator valve have modifications to properly regulate converter and cooler flow.
Reamerkit CD4E use w/ VB-FIX
- Part #
- F-73840-TL
- Reference #
- Extra information
Reamerkit CD4E use w/ VB-FIX
- Reamer
- Reamer Jig
- Guide Pin
- Drill Bits (3) For Lube Modification. See instructions
Tool Kit for 73840-RK
NOTE: Sonnax F-Tool kits designed to service a specific bore require the VB-FIX, a self-aligning valve body reaming fixture.
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Complete transmissions
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