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  1. #1
    Join Date
    Jun 2012
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    790

    Default XR1 driveshaft length w/Falcon trans

    Anyone know the driveshaft length for an xr1 rocket with a falcon transmission?? Trans is regular falcon not roller slide also

  2. #2
    Join Date
    Jun 2012
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    790

    Default

    No one knows?? H*lluva tech forum lol

  3. #3
    Join Date
    Oct 2008
    Posts
    677

    Default

    Too many variables. Get out the tape measure. Give Rocket a call.

  4. #4
    Join Date
    May 2007
    Location
    Batavia, OH
    Posts
    10,663

    Default

    Quote Originally Posted by racert22 View Post
    No one knows?? H*lluva tech forum lol
    You asked for a Falcon
    Lol
    Droop isn't the problem.

    Arizona Speedway-2. Ohio Valley-1
    East Bay-2. Lawrenceburg-2
    All-Tech-1. Florence-1
    Volusia-1
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    Atomic-1

  5. #5
    Join Date
    Feb 2014
    Posts
    17

    Default

    I have a B/G car with driveshaft in it, Iíll save you the hassle and you bring me the XR1 and Iíll send you with the B/G and Iíll deal with the driveshaft. 😂

  6. #6
    Join Date
    Oct 2008
    Posts
    677

    Default

    ^^This is the kind of out of the box thinking that this forum is best at.

  7. #7

    Default

    I would guess a 37" shaft would work.

    Or swap for that B/G car like the above posted said

  8. #8
    Join Date
    Sep 2009
    Posts
    664

    Default

    Quote Originally Posted by MachineMasters View Post
    I would guess a 37" shaft would work.

    Or swap for that B/G car like the above posted said
    Falcons and Berts are the same length as the Saginaw 3 and 4 speeds they were developed to replace. The Brinn(most latemodels) are 2" shorter so minus 2" from what ever Rocket set up book says. I'd guess 37" as I think most SLM are 39" with a Brinn,

  9. #9
    Join Date
    May 2007
    Location
    Batavia, OH
    Posts
    10,663

    Default

    Quote Originally Posted by Lizardracing View Post
    Falcons and Berts are the same length as the Saginaw 3 and 4 speeds they were developed to replace. The Brinn(most latemodels) are 2" shorter so minus 2" from what ever Rocket set up book says. I'd guess 37" as I think most SLM are 39" with a Brinn,
    The Bert is the short transmission. Brinn is the Saginaw replacement. I don't know anything about Falcon.

    I'm fairly certain an XR1 takes a 38" shaft with a Bert.
    Droop isn't the problem.

    Arizona Speedway-2. Ohio Valley-1
    East Bay-2. Lawrenceburg-2
    All-Tech-1. Florence-1
    Volusia-1
    Jackson -4
    Mudlick -1
    Moler -2
    Atomic-1

  10. #10
    Join Date
    Sep 2009
    Posts
    664

    Default

    Quote Originally Posted by MasterSbilt_Racer View Post
    The Bert is the short transmission. Brinn is the Saginaw replacement. I don't know anything about Falcon.

    I'm fairly certain an XR1 takes a 38" shaft with a Bert.
    Correct. I spoke incorrectly.
    Falcons are popular in the Modifieds and a few SLM around my neighborhood. They are something like a cheaper, Winters made version of the Bert. They have a roller bearing in the housing instead a bushing and require a hardened yoke for best life. Like anything else, they work well if you take care of them. I've had mine for nearly 10 years. I bought it used but had a tooth broken on the input shaft and the previews owner complained of it jumping out of gear. I ground and smoothed the gear tooth and adjusted the shift forks and shifter detents and it's been flawless for me. I have a spare rebuild kit but it's still on the same set of clutches.

  11. #11
    Join Date
    Jul 2014
    Posts
    367

    Default

    XR1 with std Gen2 Bert trans takes a 37-37.5" (37" preferred) shaft. Gen2 is 21.752" from bell flange face to end of tail shaft. Measure or find your trans length and cypher! No idea how long a Falcon Trans is. I do believe they are rather long, so I'd ESTIMATE a 34-34.5" shaft in an XR1.

  12. #12

    Default

    The standard slip-yoke Falcon is about the same length as the Brinn transmission. A Falcon roller-slide is the same length as any Bert transmission, which is about 3" shorter than the Brinn. So depending on which Falcon transmission tail shaft configuration you are using i would go with what CCHIEF described.

  13. #13
    Join Date
    Sep 2009
    Posts
    664

    Default

    Original Brinn is 21.5" long
    http://www.brinninc.com/brinnoriginal.html

    Brinn Pro 2 is 21.39"
    http://www.brinninc.com/brinnpro20.html

    Original Bert and G2 is 19"
    (has option for 2 5/8 longer tail)

    GM Saginaw and Muncie 23"

    Falcon LM Trans
    Standard lenght 22 1/8"
    Short tail option 14"
    Roller Slide 19.38"-24.88"
    https://wintersperformance.com/appli...ll_Website.pdf
    Last edited by Lizardracing; 02-25-2020 at 09:10 AM.

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