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 Differential Master Bearing Kit, Koyo, For CHEVROLET C2500 1988–1997, Kit

Motive Gear Differential Master Bearing Kit, Koyo, For CHEVROLET C2500 1988–1997, Kit

$297.64

Piston Rings, Cast, 4.420 in. Bore, 5/64 in., 5/64 in., 3/16 in. Thickness, 8-Cylinder, Set

Piston Rings, Cast, 4.420 in. Bore, 5/64 in., 5/64 in., 3/16 in. Thickness, 8-Cylinder, Set

$112.09

Wilwood Bracket, Front, Radial Mount, Aluminum, 5.98 Mount Center, 3/8-24 Thread, 14 in. Rotor, LH or RH, Each

Wilwood Bracket, Front, Radial Mount, Aluminum, 5.98 Mount Center, 3/8-24 Thread, 14 in. Rotor, LH or RH, Each

$213.68

ARP Washer, Hardened, High Performance, Chamfer, Flat, 10mm ID, 19.2mm OD, 2.3mm Thick, Chromoly, Black Oxide, Set of 2

ARP Washer, Hardened, High Performance, Chamfer, Flat, 10mm ID, 19.2mm OD, 2.3mm Thick, Chromoly, Black Oxide, Set of 2

$1.72