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weak parts in the t-56 speed

This is a discussion on weak parts in the t-56 speed within the Manual Transmission forums, part of the Drivetrain category; I am about to rebuild my t-56 transmission so I would like to know what parts i need to up ...

  1. #1
    Junior Member dow inc.'s Avatar
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    weak parts in the t-56 speed

    I am about to rebuild my t-56 transmission so I would like to know what parts i need to up grade and where i can find them. Thanks

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    Member SuperSport346's Avatar
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    Synchro keys and the 3-4 shift fork.

    Not sure where you're getting your parts but I bought parts from thegearbox.org and their prices were the best I could find.

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    Exalted Cyclops 67CamaroRSSS's Avatar
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    2002 Z28 A4 NBM
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    Speed is just a question of money. How fast can you go?

    Output shaft is weak on these also. There are more items but I don't know what they are. I do know they "Viperize" them for use behind that 10 cylinder monster in the Viper.

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    Just me Y2KPewterSS's Avatar
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    Quote Originally Posted by 67CamaroRSSS View Post
    Speed is just a question of money. How fast can you go?

    Output shaft is weak on these also. There are more items but I don't know what they are. I do know they "Viperize" them for use behind that 10 cylinder monster in the Viper.
    I thought the old saying was, "how fast can you afford to go"

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    Junior Member dow inc.'s Avatar
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    ok this my help (FAST) a 408 with SLP l92 heads and 300 shot. I would say 500hp every day and 800hp to play. what will brake first? I need the best parts for the less $.

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    Member c5z28's Avatar
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    On your ass flashing
    my highbeams

    tell me you have the stock rear

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    Moderator 35th-ANV-SS's Avatar
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    Agreed. Your rear-end will go before the T56 will in most instances. I was one of the lucky ones who broke my 3-4 synchro keys power shifting with only 12,000 miles on the car.

    Like above said, the 3-4 fork (steel vs. alum) and the synchro keys (solid versus stamped hollow). There are also bronze bushings you can upgrade to as well as bronze fork pads.

    Some people even have some of the parts cryogenic tempered.

  8. #8
    TJEA Retirement Home Dr.Crash's Avatar
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    Quote Originally Posted by c5z28 View Post
    tell me you have the stock rear
    Who would be dumb enough to do that?

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    Exalted Cyclops 67CamaroRSSS's Avatar
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    Quote Originally Posted by Y2KPewterSS View Post
    I thought the old saying was, "how fast can you afford to go"
    What I printed is a direct quote from the movie, including the italicized you (as it was printed on the shop exterior wall)...

    Lot's of folks paraphrase it though, myself included.

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    Moderator 35th-ANV-SS's Avatar
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    Quote Originally Posted by Dr.Crash View Post
    Who would be dumb enough to do that?
    Again...I have a Moser 9" if you're interested

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    TJEA Retirement Home Dr.Crash's Avatar
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    Quote Originally Posted by 35th-ANV-SS View Post
    Again...I have a Moser 9" if you're interested
    oh i want one, but maybe one that doesnt leak.

  12. #12
    Moderator 35th-ANV-SS's Avatar
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    Quote Originally Posted by Dr.Crash View Post
    oh i want one, but maybe one that doesnt leak.
    Lots of people on here have been saying a lot of good things about the Midwest 9"...little more pricey, but been told it's worth it.

  13. #13
    Junior Member dow inc.'s Avatar
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    not to come off the wrong way but Im asking about the T56 speed...... parts I need to up grade. not the rear end.. and yes I do have a 9''.

  14. #14
    Moderator Firebirdjones's Avatar
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    Quote Originally Posted by 67CamaroRSSS View Post
    Speed is just a question of money. How fast can you go?

    Output shaft is weak on these also. There are more items but I don't know what they are. I do know they "Viperize" them for use behind that 10 cylinder monster in the Viper.
    That is correct. Just has a 27 spline output, same weak output shaft used in 350 turbos as well as the smaller muncies of the day. They will twist if pushed to their limits. Makes the driveshaft very hard to slide in and out and then does other damage as a result
    The vipers used a 32 spline output shaft, same as 400 turbos and the better muncies of the day. Also requires a 400 turbo style yoke (obviously) but that's also a nice upgrade needed. Do a nice driveshaft with 1350 yokes while you're at it.

    Quote Originally Posted by dow inc. View Post
    ok this my help (FAST) a 408 with SLP l92 heads and 300 shot. I would say 500hp every day and 800hp to play. what will brake first? I need the best parts for the less $.
    Then I would definately Viperize it (as Jim puts it) because the stock 6 speed or even one with mild upgrades will not take that amount of power for long. My opinion, with that kind of power, if you want reliability in a manual trans you are going to have to spend some coin. I know people want to get off cheap, but this isn't one of those times. You may have to step back and save some money.

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