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Jumps out of third

This is a discussion on Jumps out of third within the Manual Transmission forums, part of the Drivetrain category; While I had my car in the shop for the rear end my m6 tranny has started jumping out of ...

  1. #1
    Story of My Life!! BIG D's SS's Avatar
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    Jumps out of third

    While I had my car in the shop for the rear end my m6 tranny has started jumping out of 3rd gear. while it was still under warranty I am having it fixed. The mechanic said he thought it was the third gear synchronizer. WHat do ya'll think??????????????

  2. #2
    "Lucky" Luciano
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    It's one of the following:

    Synchronizer damaged or excessively worn.

    Blocking ring damaged, worn index slots or friction surfaces worn or damaged.

    Excessive countershaft end play.

    Shifting fork loose on shift rail, worn or damaged fork or fork pads.

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    Member Daniel P.'s Avatar
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    mine dont really slip out of third but when im shifting to third from second at anything over 4 grand its like its not there but 2 and 3th are but if i shift at say 3500 its fine, what is the deal? It may just be me though ive never had a six speed before 2 weeks ago

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    The aluminum 3/4 fork in ALL Fcar T56s is crap. You will need an iron/ upgrade part and perhaps syncro parts if you let it go too long.Do NOT let the dealer/ repair shop put an aluminum 3/4 fork back in. The iron part is available in the GM system.

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    Story of My Life!! BIG D's SS's Avatar
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    I have heard that about the 3/4 fork. My buddy has tore out 3 of them before someone told him about the new fork. Thanks for the info.

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    The 3/4 shift fork is bent, get a steel one. It's a Viper part.

  7. #7
    rays00ramair
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    mine was the keepers that hold the clips on the synchros.rebuilt by more performance works great now.

  8. #8
    Modding is an Addiction bww3588's Avatar
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    Quote Originally Posted by Daniel P.
    mine dont really slip out of third but when im shifting to third from second at anything over 4 grand its like its not there but 2 and 3th are but if i shift at say 3500 its fine, what is the deal? It may just be me though ive never had a six speed before 2 weeks ago
    you need a shift skip eleminator. the shift skip module makes it so when the engine is wound out you have to skip a gear or 2 two. http://www.slponline.com/view_product.asp?P=21008

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    WOW , b -dub-dub3588, you have royally missed the point!!

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    Modding is an Addiction bww3588's Avatar
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    Quote Originally Posted by 30thbird
    WOW , b -dub-dub3588, you have royally missed the point!!
    whoa. yea i was replying to another post and got mixed up or somthing. sorry about that/

  11. #11
    Awaiting Activation Liquifire's Avatar
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    Quote Originally Posted by big d's ss
    While I had my car in the shop for the rear end my m6 tranny has started jumping out of 3rd gear. while it was still under warranty I am having it fixed. The mechanic said he thought it was the third gear synchronizer. WHat do ya'll think??????????????
    So was it the fork????

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