![]() ![]() That tactic worked well in several applications, but was deemed inadequate as engine torque levels reached near 500 ft lbs. Firebird was a big - block V8 that displaced 400 cubic inches, 95 more than SCCA rules allowed. Pontiac went to the nodular iron center hsg in its lower ratio Safe-t-track & HD Safe -T-Track PONTIAC 8.2 rears, that began with '67 models. The gray iron center hsgs did not provide enough pinion support with smaller (less tooth) pinion gear ring & pinion sets. 400 motor meant that, when it came to real world driving, any of the gearboxes would have ensured rapid progress. With 3.55's, the Safe-T-Track (posi) carrier would have been a 4 pinion unit, & the center hsg will be nodular iron with a Julian date code, not the common gray iron center hsg. Late '69 Firebird production, yes, they had tapered axle bearing axles. I've yet to find an original example of a late '69 model Pontiac A-body with tapered bearing axles & ive been pulling original axles, & differential parts for near 3 decades. The axles will be the std duty Pontiac 8.2 axles with RW507 sealed axle bearings. We have specialized in information for the First Generation Firebird (1967, 1968, and 1969). The types of information include body dimensions, bore and stroke, firing order, rocker ratio, valve system timing, ignition system breaker gap for the 1967 Pontiac Firebird. First Generation Firebird (1967, 1968, 1969) We are an organization that gathers and recreates yesteryears information for todays needs. The standard rearend for a base 400 350 horse 3 spd car, the base '69 GTO, was a gray iron housing Pontiac 8.2 10 bolt with 3.55 gears. The Automobile Manufacturers Association Specifications for the 1967 First Generation Firebird. ![]()
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