C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

LT1 gear change question?

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Old Nov 26, 2003 | 11:25 PM
  #1  
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Default LT1 gear change question?

95 LT1 auto car. What gears work the best with an automatic? The goal is to get improved acceleration off the line. Loss of top end is acceptible to a point. What would be a good choice for new gears? The car is mainly used for cruising and some weekend trips.

Can the computer be retuned to the new gears so the the speedo and all the fancy stuff still works acurately?

Thanks
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Old Nov 27, 2003 | 12:35 AM
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Default Re: LT1 gear change question? (Paul G)

I had 3.07's and installed 3.73's in my '95 LT1 Auto, had the computer reflashed to sync speedo, etc. Terrific accleration performance gains, have not had her past 140 mph since the change so I still do not know what top end loss has occured.

Had the work done, cost for all was about $1,200. Best mod I've done, it's like adding 40 rwhp. Tires smoke off the line (need to practice launches), tires break loose hitting 2nd and chirp at 3rd. Probably time to repalce my rear Firehawks with drag radials.

:seeya


[Modified by Beautiful Beast, 11:36 PM 11/26/2003]
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Old Nov 27, 2003 | 06:30 AM
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Default Re: LT1 gear change question? (Paul G)

3.73 for a normal auto is the best, I'm running 4.10 and they are to much for most drivers.
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Old Nov 27, 2003 | 08:01 AM
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Default Re: LT1 gear change question? (Paul G)

3.73 is a good choice, especially if you go to the track a lot. A better choice for more street driving would be the 3.45's.

I have the 3.45's and have better acceleration (1.70 60'times) and out on the highway it isn't too bad, although I don't use this car for road trips too much, that's what the six speed car is for.
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Old Nov 27, 2003 | 09:30 AM
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Default Re: LT1 gear change question? (Beautiful Beast)

I had 3.07's and installed 3.73's in my '95 LT1 Auto, had the computer reflashed to sync speedo, etc.
Is reflashing the computer something that can be done at home? What tools are needed?
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Old Nov 27, 2003 | 12:34 PM
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Default Re: LT1 gear change question? (Paul G)

I had 3.07's and installed 3.73's in my '95 LT1 Auto, had the computer reflashed to sync speedo, etc.

Is reflashing the computer something that can be done at home? What tools are needed?
You would need a Hypertech or similar instrument to do it. You can buy a single use or find a tuner in your area to do it.
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Old Nov 27, 2003 | 02:01 PM
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Default Re: LT1 gear change question? (Paul G)

I had a Tuner do it, don't like Hyper tech, and tuner did it for less than buying Hypertec module.
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