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diff upgrade

This is a discussion on diff upgrade within the LT1 forums, part of the Vehicle Specific category; so I don't know what the factory size gears are in my 95 trans am and I'm looking at doin ...

  1. #1
    Junior Member
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    black
    1995 trans am

    diff upgrade

    so I don't know what the factory size gears are in my 95 trans am and I'm looking at doin a 4.10 upgrade and need some pointers on what my current size is and what else needs to be done when upgrade to 4.10

  2. #2
    Senior Member 5.0THIS's Avatar
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    red
    95 Z28

    6 speed= 3.42s
    auto= 3.23s or 2.73s.

    The codes for the gears are on the sticker in the glovebox. It is the code that starts with GU and then a number. You can look them up online, I dont remember them off the top of my head.

    Have a pro setup the gears, it isnt something to be done by an amateur.

  3. #3
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    Red
    1995 Trans Am 6 Speed

    Quote Originally Posted by 5.0THIS View Post
    6 speed= 3.42s
    auto= 3.23s or 2.73s.

    The codes for the gears are on the sticker in the glovebox. It is the code that starts with GU and then a number. You can look them up online, I dont remember them off the top of my head.

    Have a pro setup the gears, it isnt something to be done by an amateur.
    Yes, you want a pro to do the gear change. In reading High Performance Pontiac mag. for years (back to the Thunder Am days to sow my age) there are a lot of steps and special tools involved in the change out. The question of 4.10's were discussed in LS1 a year or so ago. Try shearching and Googleing 4.10, LS1, LT1, Firebird, Camaro (ect.)

    Trying to remember that with the 6 speed manual its OK as the tall over drive still gives you some MPG.

    Good luck!

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