rear end question

Does anybody know what size rear end my car has? It is a 89 lb9 iroc with 700-r4 and the axle code is 6ht with 2.73 to 1 and posi. I'm trying to figure it out because i am wanting to get a rear drum to disc brake conversion kit. i am looking at one in summit and i dont know exactly what to get.
it is http://store.summitracing.com/partdetail.asp?autofilter=1&part=SSB%2DA125%2D3&N=0&autoview=sku

Does anybody know what size rear end my car has? It is a 89 lb9 iroc with 700-r4 and the axle code is 6ht with 2.73 to 1 and posi. I'm trying to figure it out because i am wanting to get a rear drum to disc brake conversion kit. i am looking at one in summit and i dont know exactly what to get.
it is http://store.summitracing.com/partdetail.asp?autofilter=1&part=SSB%2DA125%2D3&N=0&autoview=sku
I'm pretty sure your Camaro has a GM 10-bolt.

i think up to 89.. they got the 9 bolt BW.. the aussie rear end.. not 100% sure tho.. and from 90+ they got 10 bolts again.. someone correct me if im wrong..

i think up to 89.. they got the 9 bolt BW.. the aussie rear end.. not 100% sure tho.. and from 90+ they got 10 bolts again.. someone correct me if im wrong..
Well all he has to do is count the bolts on the diff cover.

The Aussie 9-bolt was an option used in the B4E option and performance axle ratio cars with a 2.73 & 3.27 ratio. This option used the 7 5/8" ring gear, not a 7 1/2" used with the 10 bolt. Look at the rear cover and count the bolts on the cover, or look for a rubber fill plug on the rear cover, which would indicate a 9-bolt rear. I used a rear disc conversion from a 89 IROC 9-bolt, to upgrade an 87 9-bolt with the old ratchet style caliper. The 89 had larger disc and the hydrulic parking brake in leiu of the manual ratchet.

well how do i find out if my rearend is 7.5 or 7.3/4?

i belive it is a 10 bolt.

Look at the rear cover and count the bolts on the cover, .

This determines? :dunno:

well how do i find out if my rearend is 7.5 or 7.3/4?

i belive it is a 10 bolt.
It’s 7.5 or 7 5/8 and you measure the ring gear, but it only matters if your buying gears. Everything except gears are the same on a GM 10 bolt 7.5 as a 7 5/8 axle.

If you want to be sure of what axle your Camaro has jack up the back of the car and look at the diff cover.
http://www.powertrax.com/differential.html

This determines?
9 bolts on the cover = 9 bolt axle. 10 bolts = 10 bolt axle. Etc, etc.

im pretty sure you have the 7.5" ring gear..they didnt use the 7.625 (7 5/8) until later i beleive

also..for 1988 and 1989 for him to have the borg warner rear he needs axle codes GH3 GW6 or GM3

That's alot of money for a rear disc conversion. Have you tried looking at any junk yards or ebay by any chance?

9 bolts on the cover = 9 bolt axle. 10 bolts = 10 bolt axle. Etc, etc.

Um, the number of bolts that hold the cover on don't have a thing to with 9 or 10 bolt.

9 or 10 bolts is how many attatch the ring gear itself in for rigidity.

Um, the number of bolts that hold the cover on don't have a thing to with 9 or 10 bolt.

9 or 10 bolts is how many attatch the ring gear itself in for rigidity.
The Aussie 9-bolt axle has a 9 bolt cover, a GM 10 bolt axle has a 10 bolt cover, a GM 12 bolt axle has a 12 bolt cover and a GM 14 bolt axle has a 14 bolt cover.

With GM axles you can figure out how many bolts are on the ring gear by counting the number of bolts on the cover.

If you don’t believe me hear is link with a picture of a Aussie 9-bolt and GM 14 bolt count the number of bolts on the covers:
http://www.taperformance.com/rearend.htm

Well, that may be a strange occurance amongst GMs I haven't picked up on, but in general rule of thumb, counting the number of bolts for the cover has nothing to do with the ring gear bolts.