Bracket Talk
What Driveshaft, and What Length?

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October 20, 2022, 09:38 AM
FootbrakeJim
What Driveshaft, and What Length?
The 68 Camaro roller I am setting up has been back-halved with a 9 Inch rear and Ladder Bars.
It was used with a BBC/Glide by the previous owner. I am going with that same combo. I did not get a driveshaft with the car.
Two Questions for ya:
1. Whose shaft would you guys recommend? (This will be an over-tired, under-powered car by today's standards. 32x14 tire, 900-950-ish HP).
2. How do I measure for the proper driveshaft length, once the engine and trans are in the car? Should I set the ladder bars at the middle hole, and rear axle at mid-range of travel? Do I measure from tailshaft end to centerline of yoke saddle on rear?
As always, thanks in advance for your advice and guidance! Wink

This message has been edited. Last edited by: FootbrakeJim,


Dan "Jim" Moore
Much too young to feel this damn old!!
October 20, 2022, 09:47 AM
Mike Rietow
quote:
Originally posted by FootbrakeJim:
The 68 Camaro roller I am setting up has been back-halved with a 9 Inch rear and Ladder Bars.
It was used with a BBC/Glide by the previous owner. I am going with that same combo. I did not get a driveshaft with the car.
Two Questions for ya:
1. Whose shaft would you guys recommend? (This will be an over-tired, under-powered car by today's standards. 32x14 tire, 900-950-ish HP).
2. How do I measure for the proper driveshaft length, once the engine and trans are in the car? Should I set the ladder bars at he middle hole, and rear axle at mid-range of travel? Do I measure from tailshaft end to centerline of yoke saddle on rear?
As always, thanks in advance for your advice and guidance! Wink


Measure from the center of the U joint cap on the pinion yoke, to the backside of the tailhousing. If the driveshaft company can't work with that, you're at the wrong place.

Driveshaft brand depends on your budget.

If I have 1000 hp, I want a driveshaft good for 2000 hp.
October 20, 2022, 10:02 AM
1320racer
Mark Williams and follow their guide as to how to measure
October 20, 2022, 10:14 AM
Mike Rietow
It ain't a bad idea to slide the yoke all the way in and pull it back out an inch, measure center cap to center cap.

To verify the yoke slides all the way in the tailhousing.

You can do it either way, some T400 (out of RV's) won't slide in without work done on the output shaft)


October 20, 2022, 11:27 AM
Footloose
Mike that is pretty much the way I was taught. Except some times a little different if its a jacked up 4X4.
October 20, 2022, 12:18 PM
Al Alguire
What Ed said.....


"I am not ashamed to confess I am ignorant of what I do not know."
Marcus Tullius Cicero
October 20, 2022, 08:01 PM
Eman
Place the car on a 4 post lift or on boxes so the chassis is loaded. Then measure from tail housing to flat of rear yoke.
I bought a Strange driveshaft and they have a guide on their site for measuring as does MW.
October 20, 2022, 10:48 PM
BG7X77
Mark Williams and Rossler Transmissions have the best explanations of driveshaft length and angles. Make sure the angle are correct BEFORE measuring for any length. Just my 2 cents.


BG
October 21, 2022, 06:21 AM
inferno camaro
I have used precision shaft technologies twice with very good luck. Price and quality were very good and they will tell you how they want it measured.
October 21, 2022, 07:31 AM
1320racer
I don't buy parts with the hope of being lucky, especially driveline parts that when they fail will result in costly repairs if not wrecking your car.

Mark Williams is the gold standard of drag racing driveline components.
October 22, 2022, 08:43 AM
nomad
I have a new Mark Williams driveshaft. It's got about six licks on it now. It fit well and as it's moly it's a bit lighter. It fit just right. And it matches the brakes.


nomad
Bruce Guertin


Easily distracted by bright shiny objects.

Wife says I'm a new adventure every day.


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