37777K - 3-4 RELAY O RINGED END PLUG KIT (4L60E)

# 37777K

3-4 RELAY O RINGED END PLUG KIT (4L60E)

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.

n 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.