Transmissions and Drivetrain Need help with your trans? Problems with your axle?

Planning on getting a new trans and want to change rear gears...what ratio??

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Old Sep 23, 2004 | 10:00 PM
  #1  
grafx's Avatar
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From: So. California
Car: 91 Camaro RS
Engine: 305 TBI
Transmission: Pro-Built Automatic/Vigilante 2800
Planning on getting a new trans and want to change rear gears...what ratio??

Have a stock 91 305 TBI Camaro planning on getting a new street/strip trans not sure on the stall yet but want to change the rear gears at the same time. What ratio should I go with?? Is 3.73 too much for a 305??
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Old Sep 23, 2004 | 10:46 PM
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ME Leigh's Avatar
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From: Valley of the Sun
Car: 82 Z28
Engine: Al LT1 headed LG4 305
Transmission: TH350
Axle/Gears: 3.73 posi with spacer
3.73's should be fun.
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Old Sep 23, 2004 | 11:29 PM
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From: Cincinnati, OH
Car: '90 RS
Engine: 377 LSX
Transmission: Magnum T56
You have a 305 TBI, your stock tranny is fine. Go with a 3.42 or 3.73 gear deoending on your future mods. You want to cross the traps a few hundred rpm past the point where you make peak power.
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Old Sep 24, 2004 | 12:00 AM
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I'd say 3.73 for TBI even modded. 3.42's are more for the powerband of TPI motors w/auto's.

The converter is going to depend on what your finished engine specs are, 2400 to 3000 is norm. Finish you car, dyno it so you know where you what the stall and custom order it based on your specs...
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