My car is fast anyway, but I was wondering if anyone with a similar setup noticed a huge gain after installing a 3.42 or 3.73 in a 2.77 9-bolt? A few months ago I raced my cousin's old car a 97 TA (he's got an 98 Ram Air auto now) with a stick and from 10mph to aroung 75mph, I had him by about five cars, but by that speed I wasn't really pulling anymore, my third-gear takes forever to wind up. My main goal in swapping rearend gears is to at least keep up with my friend's new TA, and really I would like beat the holy hell out it. All the major mods are in the sig.

Joe

 

about .5 seconds in the quarter

 

Well my setup is fairly close to yours. I really am not 100% sure what it did for quarter mile time change. My car never got any traction with the 2.77:1 gear and is even worse with the 3.42:1 ....... But I noticed about a .2 tenth reduction on my G-tech runs with the gear swap and LCAs, PHR, and KYB rear shocks (I did all of those when I swapped the rear end out). I think the real gain is a lot closer to the .5 figure stated above, but I really won't fully realize that until I get some sticky tires. I completely hear what your screamin on the third gear taking FOREVER to wind out..... Man I couldn't stand that when I had the 2.77 gear.. ....... Third gear is much better with the 3.42 gear but I still don't have jack of a top end charge compared to an LS1 or modded LT1..... I do have an LT1 intake swap in the works which should really work much better with the cam and rear gear combo I have right now versus the LTR setup I run now.

Hope that helps a bit....
Good Luck!!
Matt

 

It'll be a nice difference.

 

Thanks guys, I was hoping the gain would be about .5 tenths. I forgot to mention that I have Spohn subrames, lower control arms and brackets. I'm just glad it's the rearend and not the Coan Tranny that makes third gear seem like a dog. Any yeah, those LS-1's are bad from a roll, I just drove the auto Ram Air the other day, and I couldn't believe how hard it pulled from 60+. I think it has a 3.23 final ratio??, and maybe that's why it feels a lot faster than my car at higher speeds. Oh yeah I'll post some pics of my car when I get my 17X8 chrome Iroc rims from performance wheel outlet.