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| Suspension and Drivetrain Discuss suspension, and drivetrain performance modifications here. |
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#1
11-02-2008, 07:28 PM
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What do I stand to gain?
Hi guys I have a 94 Firebird with the 3.4. I love this car and they are hard to come by in Southern PA. So instead of selling it and finding a 5.7 I would like to just put larger gears in the rear end. What kind of pros and cons would this bring me? Also what kind of gearing should I go with and what kind of vechicle should I take them from? Thanks in advance Kyle
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#3
11-02-2008, 09:19 PM
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Re: What do I stand to gain?
Well to be completely honest.. The V8s or T/As around here are hard to find and when you can find one there overpriced. Like the other day a found a 98 Z28 6spd lowered with a stereo system. It had 138,000 miles but it had a fair share of aftermarket parts. They wanted 8000 for it!!! Unbelievable.
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#4
11-05-2008, 06:37 PM
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Re: What do I stand to gain?
If you change gear ratios, you'll get better acceleration, but your gas mileage will decrease. How much will depend on which ratio you go with. Check your RPO codes to see which gears your car came with from the factory. Honestly, for a V6, I wouldn't go anything higher than 3.42's. You can get those out of M6 f-bodies with the RPO code GU6.
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Sold 1994 Camaro Z28  Current Car 2003 Monte Carlo SS  Sold 2009 Kawasaki Ninja 500R 
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#5
11-10-2009, 10:52 PM
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Re: What do I stand to gain?
i discovered my rear end was wiped out tonight, bad rear bearings and as loose as they feel im sure the axel shafts are scored and junk. tomorrow im swapping out the rear with a disk brake posi unit from a 2000 z28. im going from the stock 3.08 gearing to 3.73 gearing. ill let you know how it works out.
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#6
11-13-2009, 11:43 AM
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Re: What do I stand to gain?
Quote:
Didn't he just say why he cant get a v8..............
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 Is.... peanut butter jelly time, peanut butter jelly time, peanut butter jelly time, peanut butter jelly time.  
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#7
11-14-2009, 02:40 PM
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Re: What do I stand to gain?
swap was a total success, no problems at all. the only difference were the e-brake cables. the change from 3.08 to 3.73 only caused the speedo to be off. a quick trip to a local dyno shop and it was reprogrammed. it cost me 20 bucks. and i saw very good gains in everyuthing but fuel economy, that has dropped some(expected) i used a rear out of a 2000 z28 without traction control. you can use a trac.cont. rear but you will have to play with the brake lines a little as the non traction rear uses only one brake line. the trac rear uses two independent lines instead of splitting one line. all in all its a simple true bolt in swap. even the plug for the abs is the same hope this helps
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