Gear ratios in my Blazer?

Torque Junkie · January 25, 2001

I have an '89 S-10 Blazer w/ a 2.8L and a 5 spd, and I was wondering what the rear end gearing is in it? I'm assuming it's 3.73+ because the speed to rpm ratio in the gears.

Also, is the 5 spd. the typical GM T-5 transmission (the same one in my Camaro)?

Thanks

-Mike

JohnGMC · January 31, 2001

You should have 3.73,to confirm,open glove box,there is a build sheet stuck to the inside,go to the G's.GT4 is 3.73-GT5 is 4.10-GU6 is 3.42,it has to be one of them,but I am 99% sure it has to be 3.73.As for the tranny,yes it is a T-5,no its not the same spec as the camaro one,the case is the same,but tail is different,as is gear ratios,and the s 10 one is weaker with a 210 ft -lb rating,late 80's TPI camaro untis had 300 ft lbs rating.you can swap the aminshaft and tail from an S10 unit to a camaro unit.If you try to use a camaro trannymthe shifter will come up between the seats where the center console is now.