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 Ford EXPEDITION 1997–1999, Kit

Motive Gear Differential Master Bearing Kit, Koyo, For Ford EXPEDITION 1997–1999, Kit

$461.53

MANLEY Connecting Rod Pin Bushing, Bronze, 1.100 in. OD, 1.033 in. ID, 1.175 in. Length, Set of 8

MANLEY Connecting Rod Pin Bushing, Bronze, 1.100 in. OD, 1.033 in. ID, 1.175 in. Length, Set of 8

$182.30

MANLEY Connecting Rod Pin Bushing, Bronze, 1.424 in. OD, 1.309 in. ID, 1.167 in. Length, Each

MANLEY Connecting Rod Pin Bushing, Bronze, 1.424 in. OD, 1.309 in. ID, 1.167 in. Length, Each

$22.80