99788K - OVERSIZE P/REGULATOR VALVE KIT GEN I

# 99788K

OVERSIZE P/REGULATOR VALVE KIT GEN I

Cannot be used in units that have a 053 separator plate. OE valve name: SYS.DR-V. Tool Required.

Symptoms:

Poor shift quality
Flare shifts
Harsh shifts
Erratic line pressure
Slips in Forward & Reverse
Delayed Reverse
No Reverse
TCC slip

Cause:
Excessive valve and bore clearance allows critical line pressure to exhaust causing high or low pressure depending on the location of the wear.

Correction:
The Sonnax oversized valve and tool kit restore the correct valve/bore clearances and line pressure control as well as prevent future wear in this area.

Wear is commonly found at different areas in ZF6HP19/26/32 (Gen. 1) and Ford 6R60/6R80 pressure regulator bores. Wear at the sleeve end causes high line pressure leading to broken drums, pistons or other parts, as well as restricted converter/lubrication flow. Wear at the spring end of the bore allows low line pressure and lube/TC fluid to exhaust leading to a burned converter clutch and premature bushing failure. The Sonnax oversized pressure regulator valve kit restores valve-to-bore or sleeve clearances so the pressure regulator valve can maintain correct pressures.