A 3.08 with the S10 T5 with a .72 OD transmission WOULDN'T be the correct choice for the 235. However, if you crunch the numbers with an S10 T5 with a .86 transmission from behind a 4 cylinder, you'll find that you'll be at 2030 rpms at 65 mph and can drop down to 45 mph without a downshift. A decent choice.
http://csgnetwork.com/multirpmcalc.htmlThat's why I pointed out the importance of knowing WHICH S10 T5 OD ratio transmission to purchase to make your setup stay within the torque curve. If the tag is missing from a T5 transmission you'd better be ready to spin the tailshaft to positively identify the correct OD ratio.
If Brian is truly running a 3.70 R&P the S10 .72 transmission or the .63 Camaro hybrid would be the correct choices for his 235. If he were running an S10 .86 OD transmission he would be turning up 2684 rpms in 1st gear at 15 mph and 2482 rpms at 65mph in 5th gear......fairly deep into the torque curve and only 400 rpms better than the stock 1:1 transmission. With the S10 .72 OD he'd be turning 2078 rpms at 65 mph and getting a few more mph out of 1st (3.76) gear without "winding the guts out of it."
In reality, the Camaro T5 with the .63 OD would help him out with a 2.95 1st gear and would let him cruise at 65 mph at 1818 and 2000 rpms at 70 mph. However, you may wind up having to buy an S10 donor transmission (either .86 or .72) to get a tailshaft to complete the shifter relocation.
The whole point of my post was to point out how critically important it was to properly ID the T5 transmission before you buy it. An S10 .72 T5 WILL NOT work with a 3.08 Ring and pinion but will maintain your 235 in the torque band with a 3.42, 3.55 or 3.73 R&P. It would also let you cruise at 65 mph at 2190 with a 3.90 open-driveline (55 1st and up) diff. The key is to lock in on staying well within the torque band 1500-2300 rpms.....that's where your stockish 235 will purr instead of scream.
Dave
BTW...I used a 28" tall rear tire for these calculations.
