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

what gear ratio for rear?

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Old Apr 22, 2003 | 06:33 AM
  #1  
Ringmaster72's Avatar
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Joined: Dec 2000
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From: Glen Burnie, MD USA
Car: 1989 IROC
Engine: 350
Transmission: T56
what gear ratio for rear?

I am getting ready to get new gears and posi unti in my 9 bolt. My question is what ratio would benefit me the most for drag racing? I have a T56 and my mods are in my sig. I will be getting drag radials also. I wasleaning towards 3.73 because I am afraid 4.10 will be too low for me, so anyone with experience please chime in.
Tim
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Old Apr 22, 2003 | 08:00 PM
  #2  
jfreeman74's Avatar
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Joined: Sep 2001
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From: Flowery Branch, GA
Car: 1985 Iroc-Z
Engine: 1 BA 305 TPI
Transmission: Probuilt 700R4 - 2800 Stall Midwest
Axle/Gears: 3.42
If this is a daily driver, I would say 4.10's would be too much. I would go with the 3.73.

Nice Car
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Old Apr 22, 2003 | 08:18 PM
  #3  
curt86iroc's Avatar
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Joined: Aug 2001
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From: Hillsborough, NJ
Car: 1990 IROC
Engine: L98
Transmission: TH700-R4
i know a lot of guys runnin 4.10's behind their t56's in LS1's. that 6th gear is really great for the highway....
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Old Apr 23, 2003 | 12:10 AM
  #4  
REVLIMIT's Avatar
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Joined: Nov 1999
Posts: 1,253
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From: Hawaii
Car: 1984 Chevy Camaro
Engine: Built L98
Transmission: T-56 6 speed
4.10's aint extreme well...it counts how you drive. If you speed a whole lot? then yes it till be bad. But if your more of a cruizer but pounds it on the weekends type thing then its all good. I have a T56 w/4.10 gearing. And at 1,500 I'm going 55mph which is speed limit on teh freeway here.
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