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Internal
Differential Carrier-to-Case Shim 75410-10
- Material: Steel
- Thickness: 0.010"
- Inner Dia.: 1.445"
- Outer Dia.: 2.170"
-
Helps cure:
- Driveline noise
- Excess backlash
- Reduced differential bearing life
Differential Side Gear Thrust Washer 75890-30
- Material: Steel
- Outer Dia.: 2.188"
- Inner Dia.: 1.410"
- Thickness: 0.031"
-
Helps cure:
- Excess differential/axle backlash
- Differential side gear thrust washer failure
- Washers not serviced separately
Planetary Thrust Bearing 34821-01
- Bearing Style: Enclosed
- Material: Hardened Steel
- Outer Dia.: 1.802"
- Thickness: 0.168"
- Inner Dia.: 1.132"
-
Helps cure:
- Lost or damaged component
Shim 84733-20
Input clutch endplay Input Clutch Hub
- Material: Steel
- Outer Dia.: 2.950"
- Thickness: 0.020"
- Inner Dia.: 2.385"
-
Helps cure:
- Driveline clunk
- Reduced bearing life
- Loss of lube oil
- Rapid sealing ring wear
Shim 84733-10
Input clutch endplay Input Clutch Hub
- Material: Steel
- Inner Dia.: 2.385"
- Outer Dia.: 2.950"
- Thickness: 0.010"
-
Helps cure:
- Driveline clunk
- Reduced bearing life
- Loss of lube oil
- Rapid sealing ring wear
Pump
Valve Body
(View Valve Body Layout Diagram)
Modulated Line Boost Valve Kit 84754-17K
Oversized Pressure Regulator Valve Kit 84754-46K
-
Helps cure:
- Erratic line pressure
- Burnt clutches
- Poor shift quality
- Overheating
- TCC apply & release concerns
- Low converter & lube flow
-
Tooling:
- 84754-TL46
Oversized TCC Apply Valve Kit 84754-16K
'96-Earlier with steel valve
- Material: Steel
-
Helps cure:
- Code 39, 740, 1870
- Falls out of lockup when hot
- Overheated converter
- Shudder
- Low cooler flow
-
Tooling:
- 84754-TL5
Reverse & Modulated Line Boost Valve Kit 84754-25K
Reverse Boost Valve Kit 84754-19K
Reverse Boost Valve Kit 84754-14K
TCC Apply Valve Kit 84754-22K
Case
Oversized Accumulator Pin 84573-01K
Fits 1-2 and 2-3 accumulator locations only
-
Helps cure:
- Worn accumulator piston pin bore
- Soft & inconsistent shift feel
- 1-2 Flare
- 2-3 Flare
- 2nd Slip
- 3rd Slip
- 2nd Clutch burned (GM)
- 3rd Clutch burned
- No 2nd
- No 3rd
-
Tooling:
- 84573-02K
Other
1-2 or Reverse Servo Sleeve Kit 84791-01K
This kit will replace the 1-2 or reverse servo in 4T60 applications. In the 4T60-E, this will replace the reverse servo only
-
Helps cure:
- Delayed Reverse
- Reverse slip
- Low line pressure
- No 3rd
- 2-3 Flare
- Delayed Forward only in OD range
Tech Resources
July 20, 2021
GM 4T60, 4T60-E Valve Body Layout
May 19, 2006
SonnaFlow® Chart: 4T60 (Normal & Poor)
May 19, 2006
SonnaFlow® Chart: 4T60-E (Normal & Poor)
September 16, 2005
GM TCC Circuits
Maura Stafford