ErikaJ

Hey guys Im new to the site and was wondering if anyone here can help me find out which series gears I need for my car. I am trying to buy some 3.73's and I have a 98 camaro z28, ls1 of course and the sticker on the door is missing so I dont really know how else to check the series I need. Any help? Thanks

01ssreda4

iTrader: (96)

you a manual or auto? manuals only came with a 3.42 so thats a 3 series. autos came with a 3.23 (3 series) or 2.73 (2 series). if auto, check cruise rpm. if you are at 68 mph at exactly 2,000 rpms then you have 3.23s. if at 68mph you are somewhere around 1600-1700 you have 2.73s.

ErikaJ

Its an auto..

ErikaJ

How exactly do I check that?

01ssreda4

iTrader: (96)

drive 68 mph on a freeway or simlilar road. look at your rpms. you will either be at 2000 rpms or about 1600rpms.

ErikaJ

Thanks I'll try that out..

FirstYrLS1Z

iTrader: (4)

or check driveshaft.I've seen posts that 2.73s' got a steel driveshaft and 3.23s' got an aluminum driveshaft.

01ssreda4

iTrader: (96)

^^^yes thats true as well. i believe all aluminum driveshafts are on the 3.23 auto and manual cars.