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 For Ford C6 Xtreme Performance HD Frictions for Direct Drum

TCI For Ford C6 Xtreme Performance HD Frictions for Direct Drum

$235.95

TCI Transmission Upgrade Kit, Trans-Scat, For Chevrolet, For Buick, For Oldsmobile, For Pontiac, For GMC, TH350, Each

TCI Transmission Upgrade Kit, Trans-Scat, For Chevrolet, For Buick, For Oldsmobile, For Pontiac, For GMC, TH350, Each

$131.27

TCI Input Shaft, Hardened, Vaccu Melt 300, 1.76 Carrier, Stock Spline, 12.875 in. Length, GM, Powerglide, Each

TCI Input Shaft, Hardened, Vaccu Melt 300, 1.76 Carrier, Stock Spline, 12.875 in. Length, GM, Powerglide, Each

$418.04

TCI Input Shaft, Vaccu melt 300, GM, TH350, TH400, Powerglide Spline, Each

TCI Input Shaft, Vaccu melt 300, GM, TH350, TH400, Powerglide Spline, Each

$1,400.46

TCI Automatic Rebuild Kit, Overhaul, Automatic Rebuild Kit, Overhaul, 92-'95 AODE Racing, Kit, Kit

TCI Automatic Rebuild Kit, Overhaul, Automatic Rebuild Kit, Overhaul, 92-'95 AODE Racing, Kit, Kit

$323.81

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