Diff gears
Thread Starter
Member
Joined: Apr 2005
Posts: 490
Likes: 1
From: Hamilton ON Canada
Car: 87 GTA t-top
Engine: L98 350 w/RMT
Transmission: 700R4
Axle/Gears: 9 bolt BW 3.45
Diff gears
What gears do you guys have?
What set in your opinions would be best for cruising and racing considering having a 350 TPI setup stock or even moded.
What set in your opinions would be best for cruising and racing considering having a 350 TPI setup stock or even moded.
Member
Joined: Aug 2005
Posts: 148
Likes: 0
From: Russell,Ontario,Canada
Car: 84 Z28
Engine: Modded 350ci.
Transmission: T-56
I'm going to be running a 3.73 gear set in my Z28.I've got a modded 350 and a T-56 though.The car is sitting on 255/40/17's So if i remeber right it works out to a 25" tall tire.
What tranny are you going to be using?
What tranny are you going to be using?
Supreme Member
Joined: Jan 2003
Posts: 1,931
Likes: 1
From: Ontario, Canada
Car: 1989 IROC-Z
Engine: 5.7L EFI LTR setup
Transmission: T-5 World Class
If you haev an auto ...go 3.42 . If you have a 5 speed , go with 3.73. I have them with my 353 5 speed setup and I love them.
Thread Starter
Member
Joined: Apr 2005
Posts: 490
Likes: 1
From: Hamilton ON Canada
Car: 87 GTA t-top
Engine: L98 350 w/RMT
Transmission: 700R4
Axle/Gears: 9 bolt BW 3.45
I forgot to mention setup with auto trans 700r4.
People keep telling me to go 4.11's but I dont think its good for my setup.
People keep telling me to go 4.11's but I dont think its good for my setup.
Supreme Member




Joined: May 2001
Posts: 1,410
Likes: 118
From: Kars, Ontario, Canada
Car: '87 FIREGOOSE!!!!
Do NOT go with a 4.11. You have a TPI with an auto, just as said by D above, don't go higher than a 3.42. If you have 9 bolt stock 3.27, just leave it. The only aftermarket gear is 3.70. Go with a convertor for the trans or something, it'dd be money better spent.
Supreme Member
Joined: Sep 2001
Posts: 2,031
Likes: 0
From: Cincinnati, OH
Car: 87 Iroc Z
Engine: 383ci.
Transmission: WC-T5
4.11 in the 9 bolt here, haven't tried it yet, should work good. I think neil is going with either 3.73 or 4.11 in his 9 bolt as well. They actually have quite a variation in gear numbers for that rear, if you know where to get them, which I don't.
Thanks again neil.
Thanks again neil.
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