4R70W AODE Transmissions Main Pressure Regulator Valve Sonnax 76948-01 1991-1995
4R70W has a 14 bolt pan
Replaces '95-Earlier 4-spool valves only. DOES NOT replace 3-spool valves.
Vehicles with 4R70W and AODE transmissions often have erratic line pressure, poor line rise and/or throttle-sensitive buzz. This can result in harsh or soft shifts and band/clutch failure as well as other driveability concerns. Worn pressure regulator valve spools allowing pressure escape are a common problem in these units. Installing Sonnax main pressure regulator valve 76948-01 restores normal line pressure operation in all ranges.
- Hardcoat anodized aluminum valve combats premature wear
- Annular grooves help center valve in bore to reduce side-loading
'91â'95 PR valve and '96-later PR valve designs are not interchangeable.
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