Cascade Crew

nonsensekid20 · Posted: Wed Nov 10, 2010 11:58 am Post subject: Gears in stock T5

What size gears were stock in the T5 for a 91?

Twilightoptics · Posted: Wed Nov 10, 2010 12:02 pm Post subject:

nonsensekid20 · Posted: Wed Nov 10, 2010 12:14 pm Post subject:

Oops, lol. I meant the rear end. 91 RS.

Twilightoptics · Posted: Wed Nov 10, 2010 12:18 pm Post subject:

Prob 3.42

Dewey316 · Posted: Wed Nov 10, 2010 4:16 pm Post subject:

if it is a TBI car, and a manual, it should be 3.08 from the factory.

BluFbdy · Posted: Wed Nov 10, 2010 6:33 pm Post subject:

are you looking to switch them out? or was this a curiosity thing?

nonsensekid20 · Posted: Wed Nov 10, 2010 8:49 pm Post subject:

Just curious. I've driven that car about 7 miles. lol. Before the engine swap it was a 305 TBI. 5 speed.

aaron_sK · Posted: Wed Nov 10, 2010 8:52 pm Post subject:

Get a jack and count it out. Only way to know for sure what's in there without pulling it apart. Jon will tell you about how stuff gets changed out for stupid reasons. Razz

QwkTrip · Posted: Wed Nov 10, 2010 9:36 pm Post subject:

Yeah, you really could have anything in that axle. It's not necessarily stock.

Lift the back of the car and put the trans in neutral. If you have posi then both tires should rotate the same direction and of equal amount. If you have limited slip or open differential then one wheel spins in the opposite direction as the other and you will need to chalk one wheel so it won't spin (and to make the driveshaft spin). Rotate the tire 10 times and count the number of revolutions of the driveshaft.

Gear Ratio = (driveshaft rotations) / (wheel rotations)
You need to multiply by 2 if you chalked one wheel.

The more brainless you can make this the more accurate you will be. I put a piece of tape in the 6 o'clock position on the driveshaft and do the same on the wheel that I'm going to rotate. (remember, you can move tape to line things up again Wink

) I also keep two columns of data on a piece of paper and place a hash mark in the appropriate column each time the driveshaft or wheel goes a full revolution. If you are uber accurate then you can just spin the wheel once. I'm not that good. Spinning the wheel 10 times improves accuracy. You're trying to measure a small fraction of a difference in gear ratios so being off by a little bit can make things questionable. I used this procedure on my Camaro and was accurate within 0.01.

BluFbdy · Posted: Wed Nov 10, 2010 10:52 pm Post subject:

The only exception to that is if you're running a zexel torsen, they won't run the worm gear up enough by just rotating it in which case the only thing you can do to be TOTALLY sure is to open it up and have a look, check for posi and count the ring and pinion while you're in there driven divided by drive (ring gear divided by pinion) and you have your ratio

On a side note I've got a set of richmond gears with like 70 miles on them, 3.23 if you're interested, I pulled them outta my truck and swapped to a 4.10 and they were cleaned off and put back in their box if you're interested

QwkTrip · Posted: Thu Nov 11, 2010 4:59 am Post subject:

No, the Torsen is no different than anything else. It is gear driven and behaves like an open diff when you rotate it.

I just went through this in a few weeks ago on my 2001 SS. Wink

BluFbdy · Posted: Thu Nov 11, 2010 5:29 pm Post subject:

Yeah that's what I meant, they're the most deceptive unit cuz you can tell by just spinning the tires in the air, we had that issue with my friends gta it had a torsen, I checked it by jackin up the axle and spinning it, looked like an open diff but I could swear up and down both tires were spinning when I burnt out, popped the cover and bam zexel torsen lol sneaky pricks

nonsensekid20 · Posted: Fri Nov 12, 2010 8:59 am Post subject:

From what I remember, last time I checked I spun the right wheel, but the left didn't spin. hmm..

Does anyone have a posi unit?

BluFbdy · Posted: Fri Nov 12, 2010 11:48 am Post subject:

I've got one in a box

QwkTrip · Posted: Fri Nov 12, 2010 3:41 pm Post subject:

nonsensekid20 · Posted: Fri Nov 12, 2010 7:43 pm Post subject:

Wanna trade for a non posi? lol.

BluFbdy · Posted: Sat Nov 13, 2010 8:33 pm Post subject:

I've been sitting on my torsen unit for a while I haven't gotten the axles fr it, just search ebay for them, don't get a gov-loc unless you feel like re doing it later I blew thru 3 of them before I gave up and put an open unit in there, I pickied up the torsen hoping to swap it but you need the proper series gears and a new set of axles becaus e the spline count is different

QwkTrip · Posted: Sun Nov 14, 2010 8:08 am Post subject:

The Torsen has 28 spline input. 1990 and up axles have 28 spline axle shafts. You only need to swap axle shafts if you have an older car.

The Torsen comes with both 2-series and 3-series gears. Which do you need? I am sitting on a 2-series right now. If you're sitting on a 3-series that you can't use, then I might work a straight up trade for my 2-series and in the end we're both happy. Wink

BluFbdy · Posted: Sun Nov 14, 2010 11:21 am Post subject:

QwkTrip · Posted: Mon Nov 15, 2010 10:54 am Post subject:

I didn't follow anything you said, but I'll take that as a "not interested."