Differential size in 1999 trans am 10 bolt 7.5 or 8.5
#1
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Differential size in 1999 trans am 10 bolt 7.5 or 8.5
im tryin to figure out what kinda 10 bolt rear end i have on my 99 trans am...do i have a 7.5 or a 8.5? its automatic with 3.23 gear.
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#4
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i believe it's technically 7.625 (or 7-5/8) but everyone refers to it as a 7.5" ring gear size. wanna say when you look at gear sets you'll see advertised either 7.5 or 7.625 and either I think will work. you also want to verify the "series" carrier you have, and I want to say you have a series 3 so account for that when buying a new gear set or differential- make sure the gears are for the right series carrier.
Any axle with ratio of 3.08 or lower (down to 2.73 like in the automatics) was a series 2 carrier. Ratios of 3.23 (and 3.42 in the manual transmission cars) and higher were series 3 carriers.
https://ls1tech.com/forums/gears-axl...r-end-faq.html
Any axle with ratio of 3.08 or lower (down to 2.73 like in the automatics) was a series 2 carrier. Ratios of 3.23 (and 3.42 in the manual transmission cars) and higher were series 3 carriers.
https://ls1tech.com/forums/gears-axl...r-end-faq.html