GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 1999 🢒 Chevrolet C-Series Medium Duty Truck B7 🢒 Transmission/Transaxle 🢒 Automatic Transmission - Allison 🢒 Slips in Reverse and First Gear Only

Slips in Reverse and First Gear Only for Chevrolet Chevrolet C-Series Medium Duty Truck B7 1999

Problem

Action

The first clutch is slipping.
  1. Overhaul the clutch.
  2. Replace the piston seals.

The piston seal rings are cut.

Replace the seal rings.

The clutch-apply oil feed tube is loose or leaking.

Reset or replace the feed tube.