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

Motive Gear Bearing Kit, Timken, Dana 30 Reverse, Dana 30 Standard, Kit

Motive Gear Bearing Kit, Timken, Dana 30 Reverse, Dana 30 Standard, Kit

$173.24

MANLEY Connecting Rod Pin Bushing, Bronze, .910 in. OD, .820 in. ID, .950 in. Length, Each

MANLEY Connecting Rod Pin Bushing, Bronze, .910 in. OD, .820 in. ID, .950 in. Length, Each

$22.80

Sonnax Rin. Ratio Servo Piston Kit, Ford, C6 Mid '68-Later, Each

Sonnax Rin. Ratio Servo Piston Kit, Ford, C6 Mid '68-Later, Each

$258.54

Sonnax Heavy Duty Input Shaft, Ford, 4R100 / 5R110W, Each

Sonnax Heavy Duty Input Shaft, Ford, 4R100 / 5R110W, Each

$570.47