Automatic Transmission Flex Plate Installation

WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.

Courtesy of GENERAL MOTORS COMPANY

NOTE:
The flex plate does not use a locating pin for alignment and will not initially seat against the crankshaft flange, but will be pulled onto the crankshaft by the engine flex plate bolts. This procedure requires a 3 stage tightening process.

Install the flex plate to the crankshaft.
Apply threadlock to the threads of the flex plate bolts. Adhesives, Fluids, Lubricants, and Sealers
Fig 1: Flywheel Bolt Tightening Sequence
Courtesy of GENERAL MOTORS COMPANY

CAUTION:
Refer to Fastener Caution .

Install the engine flex plate bolts.
1. Tighten the engine flex plate bolts (1 - 6) a first pass in sequence to 20 N.m (15 lb ft).
2. Tighten the engine flex plate bolts (1 - 6) a second pass in sequence to 50 N.m (37 lb ft).
3. Tighten the engine flex plate bolts (1 - 6) a final pass in sequence to 100 N.m (74 lb ft).