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

Rear End Swap???

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Old Dec 14, 2003 | 09:20 PM
  #1  
86TransAMsbc305's Avatar
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From: Bush, Louisiana, USA
Car: 1986 Pontiac Trans Am
Engine: LG4 305
Transmission: 700R4
Rear End Swap???

Will there be a noticable difference in performance if I swap from 2.73's to 3.42's?
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Old Dec 15, 2003 | 05:42 AM
  #2  
ede's Avatar
ede
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From: Jackson County
yes
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Old Dec 15, 2003 | 08:19 AM
  #3  
MdFormula350's Avatar
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From: Maryland; USA
a boost in 1/4 mile time will be noticable, no doubt.
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Old Dec 16, 2003 | 09:56 PM
  #4  
TKOPerformance's Avatar
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From: Newark, DE
Car: '86 Camaro, '02 WRX, '87 K5, '67
Engine: 350 TPI, 2.0turbo, 383 in the works, 289-4BBL, 232, A-head 4-cylinder
Transmission: T56, 5-speed, 700R4, C4, T176, semi-auto 2-speed
Axle/Gears: 3.73, 3.90, 4.88, 3.55, 3.54, 7.00
Would adding another 100HP make a noticeable difference? That's what stepping up almost a full point of gear will be like. It can shave a full second off your ET. I once went from 2.73s to 3.55s in my Mustang and it was like driving a different car. All the sudden I had traction problems!
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