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

Sonnax Accumulator Piston Kit, Chrysler, 42-46-47Rh/Re, 48RE, 727, 904, Each

Sonnax Accumulator Piston Kit, Chrysler, 42-46-47Rh/Re, 48RE, 727, 904, Each

$77.81

RTS OE Speedometer Gear, For GM, 700R4 4L60 TH350BOP, 19 Tooth Drive, Each

RTS OE Speedometer Gear, For GM, 700R4 4L60 TH350BOP, 19 Tooth Drive, Each

$53.58

TCI Automatic Rebuild Kit, Overhaul, Automatic Rebuild Kit, Overhaul, 80-'89/'90-'93 AOD Racing, Kit, Kit

TCI Automatic Rebuild Kit, Overhaul, Automatic Rebuild Kit, Overhaul, 80-'89/'90-'93 AOD Racing, Kit, Kit

$240.54

Motive Gear Axle Shaft, 1541 Manganese, 5x5.5 in. Bolt Pattern, 29.625 in. Length, 28SPL, ForD BRONCO 1966–1975, Each

Motive Gear Axle Shaft, 1541 Manganese, 5x5.5 in. Bolt Pattern, 29.625 in. Length, 28SPL, ForD BRONCO 1966–1975, Each

$306.22