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Symptoms:
  • Drops out of 4th
  • Loss of 4th signal oil
  • Loss of D3 oil
  • No 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 O-ringed Sonnax 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

3-4 Relay O-Ringed End Plug Kit
  • 77964-08k_combo

  • 3-4 Relay O-Ringed End Plug Kit

Small_77964-08k_combo Small_77964-08k

4L60-E, 4L65-E, 4L70-E

3-4 Relay O-Ringed End Plug Kit

Part No. 77964-08K

  • End Plugs (5)
  • O-Rings (5)

Complaint:

  • Drops out of 4th
  • Loss of 4th signal oil
  • Loss of D3 oil
  • No 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 O-ringed Sonnax end plugs to prevent loss of critical 4th signal and/or D3 oil.

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 the O-ringed Sonnax end plugs 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

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