MrMac98

1990 gta L98 now with T56 LT1 style..

I have 3.23gears now but not right for the T56, so 3.42/3.73/4.10 are my choices..

I am leaning to 3.73 so I can actually use 6th gear.

My driving is to car shows and longer drives.. no autocross or 1/4 mile.

any one actually have experience in this area.?

thoughts??

thanks
Mike

jmd

iTrader: (4)

3.90

big gear head

Many people use 4.11 gears with the .5 overdrive. You will need a good drive shaft to prevent a vibration around 70 MPH.

NowhereFast

x2

Would totally eliminate 3.42s as a choice though. They suck in my 99. 6th is useless, unless being under 2,000 rpm at 80mph is appealing to you.

Doobie52

I did the T56 swap a few months ago and I went with 3.73s. I'm loving them. In my old Formula I had 4.10s behind a T56 and the were great for drag racing, but a little much for cruising. 3.73s have my vote.

86iroct5

i have 3.73 and wish i went 4.11. i have a 27in tall tire instead of the stock 26in, i need some more gear

tom86iroc

iTrader: (1)

i have 3.90 and have plenty left in 6th gear and cruising at 80 at 1800 rpm

MrMac98

OK sounds like 3.90 would be ideal-
however- I have a 10 bolt so back to 3.73 vs 4.10.
I have 245-50/16 stock height tires.

I am leaning toward 3.73.

jmd

iTrader: (4)

It is. And Summit lists two different sets of Motive 3.90 gears for the 7.5" 10 bolt.

Before you order, you might also want to make sure your T56 isn't a 1993 version.

MrMac98

see why I come here, did not realize 3.90 was an option
3.90 seems to be the right choice for me.
trans was from 1996 Camaro so it is .5 OD
thanks