In 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

More From This Category

TCI Clutch Plates Hi-Perf Frictions Forward GM 2004R .078(4 ea.)

TCI Clutch Plates Hi-Perf Frictions Forward GM 2004R .078(4 ea.)

$109.62

TCI Frictions High Perf. Forward TH350 .098 (5 ea.)

TCI Frictions High Perf. Forward TH350 .098 (5 ea.)

$71.69

Motive Gear Differential Bearing Kit, Koyo, For CHEVROLET CORVETTE 1985–1996, Kit

Motive Gear Differential Bearing Kit, Koyo, For CHEVROLET CORVETTE 1985–1996, Kit

$242.97