Sonnax GM 4T60-E Transmission

Internal

3rd Clutch Piston Kit 84965-01K

3rd Clutch Piston Lip Seal 84965-SK

Bearing Kit SBK-G11

Fits '84-later

Helps cure:

Bearing noise
Bearing failure

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

Pump Vane 4662

Koyo (OE Manufacturer)

Helps cure:

Lost or damaged component

Valve Body (View Valve Body Layout Diagram)

2-3 Shift Valve 84754-36K

Fits ’94-later 4T60-E. Does not fit 4T65-E Geartronic® or Tapshift® units.

Helps cure:

Erratic shifts
2-3 Shuttle
No 3rd
Temperature-sensitive shifts
No 4th
2nd Gear starts

3-2 Manual Downshift Valve 84754-37K

Fits ’94-later 4T60-E. Does not fit 4T65-E Geartronic® or Tapshift® units.

Helps cure:

Erratic shifts
2-3 Shuttle
No 3rd
No 4th
2nd Gear starts
Temperature-sensitive shifts

4-3 Manual Downshift Valve 84754-39K

In 4T60-E units, fits '91-later units only.

Helps cure:

Erratic shifts
2-3 Shuttle
Temperature-sensitive shifts
No 3rd
No 4th
2nd Gear starts

Checkball 10000-11

Imidized Plastic, .375" Dia.

Material: Imidized Plastic
Dia.: 0.375"

Checkball 10000-08

Material: Imidized Plastic
Dia.: 0.250"

Helps cure:

Lost or damaged component

Modulated Line Boost Valve Kit 84754-17K

High Ratio, .199" dia. small spool

Helps cure:

Low line rise
Soft shifts
2nd Clutch distress
3rd Clutch distress

Oversized 1-2 & Reverse Servo Boost Valve Kit 84754-40K

Fits either of 2 locations

Helps cure:

1-2 Flare
Delayed engagement
Low Reverse pressure
1-2 Band burned

Tooling:

84754-TL2
84754-TL4

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

High Ratio

Helps cure:

Low line rise
Low Reverse boost
Soft shifts
2nd Clutch distress
3rd Clutch distress

Reverse Boost Valve Kit 84754-19K

High Ratio, .293" dia. small spool

Helps cure:

Low Reverse boost

Reverse Boost Valve Kit 84754-14K

Low ratio, .273" dia. small spool

Helps cure:

Low Reverse boost

TCC Apply Valve Kit 84754-22K

'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

TCC Regulator & Isolator Valve Kit 84754-01K

Fits '93-later units.

Helps cure:

Code 39, 740, 1870
Overheated converter
Falls out of lockup when hot
Converter shudder

Case

Differential Lube Tube Retainer Kit 84532-01K

Helps cure:

Differential lube failure
Difficulty in retaining differential lube tube

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

Servo/Band

Extended Length Forward Band Servo Pin Kit 84571-01K

Helps cure:

Band failure
Forward slip
Burnt Forward band

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

Channel Plate Sleeve 8041

Helps cure:

Worn channel plate sleeve

Tool Kit 84754-TL2

Tool Kit 84754-TL46

Tech Resources

July 20, 2021

GM 4T60, 4T60-E Valve Body Layout

March 28, 2017

Stop 4T60-E, 4T65-E Case Wear, Band Slippage & Breakage with a Longer Servo Pin

Jim Dial

January 01, 2013

GM 4T60-E Valve Body Identification

Valve Body Xpress

January 01, 2013

GM 4T60-E Soft Shifts

Valve Body Xpress

October 22, 2011

It Is Never Wrong to Do Right

Dan Tucker

September 30, 2009

Easy Fix for 4T60-E Accumulator-Housing Pin Wear

Gregg Nader

April 02, 2008

An Easier Way to Rebuild Planets

Gregg Nader

September 05, 2007

Conquering the Planets

Gregg Nader

July 31, 2007

Deja Vu All Over Again

Ed Lee

May 19, 2006

SonnaFlow® Chart: 4T60-E (Normal)

May 19, 2006

SonnaFlow® Chart: 4T60-E (Poor)

May 19, 2006

SonnaFlow® Chart: 4T60-E (Normal & Poor)

September 16, 2005

GM TCC Circuits

Maura Stafford

August 14, 2004

Good Vibrations, 4T60-E Differential Problems

Gary Carne

September 15, 2003

Beyond 1870: GM Converter Codes P0741, P0742 and 1887

Gregg Nader