Subject: Uneven Wear-Outer Ribs on Corvette Tires
Model and Year: 1984 - 1986 Corvette
Source: Chevrolet Dealer Service Bulletin
Number: 86-62
Section: 3E
Date: Apr., 1986
TO: ALL CHEVROLET DEALERS
Some 1984-86 Corvettes may experience uneven tire wear on the outer ribs of the front tires (if the toe-in on the rear tires is severe, the rear tires may experience this wear also).
To eliminate or minimize this type of uneven tire wear, check the alignment on a 4 wheel alignment machine and reset both front and rear sum-toe to 0 +/- .2 degrees. Set the rear wheels first.
The toe specification was changed on February 21, 1986 for factory setting and service. Any cars built after this date (VIN 120992) are built to the new specifications.
| OLD | REVISED | |
|---|---|---|
| Front Sum-Toe | .3 +/- .2 degrees | 0 +/- .2 degrees |
| Rear Sum-Toe | .24 +/- .15 degrees | 0 +/- .2 degrees |
Labor Operation Number: E2020
Labor Time: 1.6 Hours
© Copyright General Motors Corporation. All Rights Reserved
Article ID: 40
Created: July 2, 2014
Last Updated: July 2, 2014
Online URL: https://www.corvetteactioncenter.com/tech/knowledgebase/article/1984-1986-corvette-service-bulletin-uneven-wear-outer-ribs-on-corvette-tires-40.html