XR1 driveshaft length w/Falcon trans

[racert22]

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

[racert22]

No one knows?? H*lluva tech forum lol

[keeks]

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

[MasterSbilt_Racer]

No one knows?? H*lluva tech forum lol

You asked for a Falcon
Lol

[JLyons]

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

[keeks]

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

[MachineMasters]

I would guess a 37" shaft would work.

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

[Lizardracing]

I would guess a 37" shaft would work.

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

[MasterSbilt_Racer]

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.

[Lizardracing]

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.

[CCHIEF]

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.

[collateralDamage]

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.

[Lizardracing]

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/application/files/6215/7444/2095/Transmission__Drive_LineBellAll_Website.pdf