i have a 93 z28. i was wondering if any of you may know what rear end gears i may have. i have a TH700R4 transmission with a selectable 1st gear. i know that in some cars you cannot manually select 1st gear, don't know if this is a factor or not. thanks for the info

 

If you can select 1st gear (and its not a "cut the corner off the plastic blocking plate" mod), it probalby has 3.23's. Check the build tag for codes.

GU5 = 3.23
GU2 = 2.73

 

yeah, if u can select a 1, then u have 3.23's, if it is blank for 1 and goes to 2, then u have 2.73's

 

thank u guys

 

wait....i have overdrive, 3, 2 but not a selector for the 1. i just budge down below the 2nd gear, and it goes to 1. but there is no selector for a 1st gear. is that weird????

 

Someone "modded" your shifter gate by cutting off the plastic stop on your shifter under the console. This is a common mod for people with 2.73 gears. GM did not want you to be able to manually choose 1st gear in A4 cars with 2.73s....Like Injuneer stated, you really need to check your option codes to be sure...that is, unless the previous owner changed the gears before you got the car....
--Alan

 

hey thanks a lot, every ones info has really helped. i'll check my code then but considering all the info it looks like i may have 2.73's . thanks again

 

If I'm wrong here, please forgive my ignorance, but I thought all automatic 4th-gens got 4L60E transmissions, not TH700R4.

 

The 93's were the only fourth gen's that came with a 700R4 (4L60)