March 02, 2016
Symptoms:
- Loss of D3 oil
- Loss of 4th signal oil
- No 4th
- Drops out of 4th
Cause:
The hammering affect of the 3-4 relay and/or 3-4 shift valves can cause the soft aluminum end plugs to wear, resulting in loss of 4th signal and/or D3 oil.Correction:
Replace the worn OE end plugs with the Sonnax O-ringed end plugs to prevent loss of critical 4th signal and/or D3 oil.4L60-E, 4L65-E, 4L70-E
3-4 Relay O-Ringed End Plug Kit
Part No. 77964-08K
Fits two locations
View Instructions Find a DistributorIn GM 4L60-E, 4L65-E and 4L70-E units, the hammering effect of the 3-4 relay and/or 3-4 shift valves can cause the end plugs to wear, resulting in loss of 4th signal and/or D3 oil. Replace the worn OE end plugs with Sonnax 3-4 relay O-ringed end plug kit 77964-08K to restore hydraulic integrity and prevent loss of critical 4th signal and/or D3 oil.
- O-Rings on the end plugs provide a positive seal
- Restores hydraulic integrity at the end plug
Each unit requires 2 end plugs and O-rings.
- End Plugs (5) 3 Extra
- O-Rings (5) 3 Extra
Sonnax valve body layouts provide a detailed overview of individual units making it quick and easy to determine what’s available for the specific valve body you’re working on. See all Sonnax valve body layouts.
GM 4L60-E, 4L65-E, 4L70-E Valve Body Layout
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Related Sonnax Parts
Required
Recommended
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
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