Low Main Pressure in First Gear. Chevrolet Chevy P12 Chassis 1999

For 1990-2009 cars only

Makes 🢒 Chevrolet 🢒 1999 🢒 Chevy P12 Chassis 🢒 Transmission/Transaxle 🢒 Automatic Transmission - Allison 🢒 Low Main Pressure in First Gear

Possible Cause	Action
The first range circuit is leaking in the control valve body.	Replace or rebuild the control valve body.
The first clutch piston seals are leaking excessively.	Overhaul the transmission. Refer to applicable Allison Transmission Service Manual. Replace the seals. Refer to applicable Allision Transmission Service Manual.

Possible Cause

Action

The first range circuit is leaking in the control valve body.

Replace or rebuild the control valve body.

The first clutch piston seals are leaking excessively.

Refer to applicable Allision Transmission Service Manual.