Quote:
Originally Posted by reichdav
I know this is an old thread but here goes. Got a T5 from S10 without current knowledge. Must be from 4cyl. First gear with the 4.11 rear won't get across an intersection. OD not much better than 4th. Want to have trans shop put V6 gearing in this trans and go to 3.73 ring and pinion. Engine is 235. Comments?
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If you have a non-world class S10 T5 tranny, you can look for a non-world class 5th gear set on eBay.
You have a choice. You can swap both the rear and the T5 gears . . . .
. . . . . . or you can just swap the rear.
For a 3.73 rear diff, you will want a 0.72 OD (5th gear set). Switching just the 5th gear set will require about 1.5 hours of work.
If your current T5 gear set (presumably from a 4cylinder S10) has a 4.03 first gear and a 0.86 5th gear, then a 3.08 rear will fix everything. To me, it makes perfect sense to just swap your rear to a 3.08 and be done with it. No need to change the T5 gearing if you swap to a 3.08 rear.
Here are the numbers for a T5 with your gearing matched with a 3.08 rear diff.
For a daily driver, a nice performing drivetrain will have a final number between 9 and 12 for first gear and ideally between 2.6 and 2.8 for fifth gear.
Typical 4 cylinder S10 T5 gearing matched with a 3.08 rear diff.
First gear 4.03 X 3.08 = 12.41
Second gear 2.37 X 3.08 = 7.30
Third gear 1.49 X 3.08 = 4.59
Forth gear 1.00 X 3.08 = 3.08
Fifth gear 0.86 X 3.08 = 2.65
Typical 6 cylinder S10 T5 gearing matched with a 3.73 rear diff.
First gear 3.78 X 3.73 = 14.10
Second gear 2.18 X 3.73 = 8.13
Third gear 1.42 X 3.73 = 5.30
Forth gear 1.00 X 3.73 = 3.73
Fifth gear 0.72 X 3.73 = 2.68