Thread: Trans build options in 2019

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  1. #1 Trans build options in 2019 
    GTP Level Member 04lss's Avatar
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    Hi folks,

    I know there are plenty of threads on how to build a trans, but im finding that parts have gone out of production on certain things. Notably the 7/8" chain

    my "plan" is to run a z3 turbo kit with the precision 6262 turbo on e85 etc making about 400-420whp

    The idea would be to very ... VERY carefully run a stock HD trans while building another one on the side.

    I know i would want to do the 300m input shaft.

    My understanding is that the stock chain fails somewhere after 350? whp. I have been trying to source a 7/8 single chain, but it appears they are out of production now. I recall reading that the GXP chain is compatible and stronger.

    A few questions:

    1. Where do i source something like this

    2. is it a double chain, or single?

    3. will it hold 400whp

    4. Can i just grab the trans from a GXP or v8 impalla?


    5. What else do i need? Ive read that the flex plate potentially needs to be upgraded, and maybe the Torque converter? are there still good sources for these?
    2017 GTI 6mt 320whp 400wtq , 2012 Volvo S60 T6 300hp of Swedish safety, (Sold) 2019 Ford Mustang GT. 460 screaming eagles. 2004 Buick Regal GS "Gramps" Intercooled, corn fed, ported g3 m90, 1.9 rockers, 80# injectors.
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  2. #2 Re: Trans build options in 2019 
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    don't know answers to anything else but ive heard the ls4 trans is just as bad if not worse than ours and I don't believe it is a direct bolt in
    2004 gtp SD headers, e85, #60 injectors, Walbroh 255lph, junkyard custom fender well intake, lq4 MAF, 2.8 Pulley, 1.95 rockers, l76 springs, ssic w/ vw rad shift kit and tranny cooler 275/45r17. BMR trailing and rear control arms, zzp STB's, tubular control arms, Dorman and Addoco sway bars, intense coilovers, all poly. avid av-20s
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  3. #3 Re: Trans build options in 2019 
    GXP Level Member GTPpower's Avatar
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    Gxp chains are stronger than the 7/8. They are holding 500+. I've seen 7/8 chains stretch with as little as 300hp.

    You can buy the gxp chains from dave or other parts. Hv093 is the part number.

    They are double chains.

    You can get them from an ls4 car...actually I think all 4t65e's 2005 and later had them. But they are about $100 brand new, so I wouldn't even mess with used chains.
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  4. #4 Re: Trans build options in 2019 
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    my bad didn't read the whole original post like a scrub
    2004 gtp SD headers, e85, #60 injectors, Walbroh 255lph, junkyard custom fender well intake, lq4 MAF, 2.8 Pulley, 1.95 rockers, l76 springs, ssic w/ vw rad shift kit and tranny cooler 275/45r17. BMR trailing and rear control arms, zzp STB's, tubular control arms, Dorman and Addoco sway bars, intense coilovers, all poly. avid av-20s
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  5. #5 Re: Trans build options in 2019 
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    I believe Triple Edge Performance is your only option nowadays. If you did it yourself Intense Racing and ZZP have the parts.
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