March 02, 2016
GM 4L60-E, 4L65-E, 4L70-E Vacuum Test Guide
Vacuum testing is an efficient way to identify the root cause of transmission problems and evaluate the effectiveness of repairs. Frequent, proper vacuum testing can put money in the bank, improve turnaround time in your bays, and prevent costly comebacks.
See how easy it is to master vacuum testing and work with confidence knowing your rebuild is done right the first time.
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Related Units
Related Parts
Required
Recommended
4L60-E, 4L65-E, 4L70-E
TCC Regulator & Isolator Valve Kit 77754-03K
4L60-E '97-earlier only, non-EC3 units
-
Helps cure:
- Code 894, 1870
- Overheated converter
- Low TCC apply pressure
- 3-4 Clutch burned
- 1-2 Harsh
- Low line pressure
Required
Recommended
4L60-E, 4L65-E, 4L70-E
TCC Regulator & Isolator Valve Kit 77754-04K
Fits all years & '98-later EC3 units
-
Helps cure:
- Code 894, 1870
- Overheated converter
- Low TCC apply pressure
- 3-4 Clutch burned
- 1-2 Harsh
- Low line pressure
Required
Recommended
4L60-E, 4L65-E, 4L70-E
Actuator Feed Limit Valve Kit 77754-09K
-
Helps cure:
- Wrong gear starts
- Solenoid performance codes
- Erratic line pressure
- Clutch failure
- Band failure
- No 4th
- Harsh shifts
- 2nd Gear starts
Required
Recommended
4L60-E, 4L65-E, 4L70-E
Oversized 3-4 Shift Valve Kit 77754-42K
-
Helps cure:
- 2nd Gear starts
- Low AFL pressure
- 3rd Clutch failure
- 3-4 Concerns
Required
Recommended
4L60-E, 4L65-E, 4L70-E
Isolator Sleeve Kit 77754-ISO
-
Helps cure:
- Code 894, 1870
- TCC cycling
- TCC slip
- 3-4 Clutch failure
Required
Recommended
4L60-E, 4L65-E, 4L70-E
Oversized Pressure Regulator Valve 77917-07
-
Helps cure:
- Erratic line pressure
- Low line rise
- 3-4 Clutch failure
- Excess pump noise
- Reverse chatter
Required
Recommended
4L60-E, 4L65-E, 4L70-E
Oversized 4-3 Sequence Valve Kit 77964-04K
-
Helps cure:
- No 4th
- 2-4 Band burned
- Low 4th Gear pressure
Required
Recommended
4L60-E, 4L65-E, 4L70-E
3-4 Relay O-Ringed End Plug Kit 77964-08K
Fits two locations
-
Helps cure:
- Loss of D3 oil
- Loss of 4th signal oil
- No 4th
- Drops out of 4th
Required
Recommended
4L60-E, 4L65-E, 4L70-E
Oversized 4-3 Sequence Valve Kit 77964-14K
Use with OE valve/bore only, addresses wear at inboard two spools & other locations.
-
Helps cure:
- 2-4 Band burned
- Low 4th Gear pressure
- No 4th
- 2nd Quality poor
Required
Recommended
4L60-E, 4L65-E, 4L70-E
Oversized Forward & Reverse Abuse Valve Kit 77754-58K
Fits in either of two locations.
-
Helps cure:
- Delayed Forward
- Delayed Reverse
- Forward or Low/Reverse clutch distress
- Damaged valve body casting
- Low line pressure upon engagement
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