Frequently Asked Questions
Find answers to Frequently Asked Questions for First Generation Firebirds that have been asked and answered on FGF. Special thanks needs to be given to all the FGF members who took the time to respond to other member's questions.
Dealer Technical Bulletins - Section 04 - Rear Suspension, Differential, Prop Shaft
Bulletin 68-I-15 — Pontiac Motor Division Dealer Service Information Bulletin, Section 4, dated October 16, 1967. Attention: Service Manager.
Subject: Safe-T-Track Rear Axle Lubricant.
Short answer: Differential chatter on low-speed turns in Safe-T-Track equipped units is cured by a lubricant change; only Part No. 1050081 [Z] (Gp. No. 8.800) is approved — no substitute is recommended.
A number of cases of differential chatter on low speed turns have been reported in recent years on Safe-T-Track equipped units. Investigations prove that lubricant change is still the recommended fix for axle chatter.
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Content last modified: June 9, 2026 at 7:10 am

