Author Topic: How To Make A Spare Driveshaft  (Read 189 times)

EDNY

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33 Chevy 5 Window, 34 Chevy 3 Window, 37 Chevy 4dr sedan

sammons

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Re: How To Make A Spare Driveshaft
« Reply #1 on: March 13, 2019, 09:51:19 PM »
Lol, hell that's the way I cut mine down for good drive shaft :)  They forgot to mention to scribe a line to keep driveshaft yokes in correct time. Also scribe a line on any factory weights to put back on if you have to cut that end off.  Never had one vibrate when done, just lucky I guess! ;)

Rattiac

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Re: How To Make A Spare Driveshaft
« Reply #2 on: March 13, 2019, 10:48:01 PM »
Ooh that is cool. ;D Thanks.

Speaking of which,, I have a slight vibration I cannot get rid of at about 68-70mph.
 So for awhile I've just stuck to 63-65.

I've made sure front and rear pinion angles are good with small improvements. (Adjustable upper control arms & shims). Even had em balanced .
Might take a to a driveshaft shop one of these days.
« Last Edit: March 13, 2019, 10:49:32 PM by Rattiac »

sammons

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Re: How To Make A Spare Driveshaft
« Reply #3 on: March 14, 2019, 12:12:24 AM »
Rattiac, not sure if your Jeep has the rear drive middle slip yoke, but worth a look.

When I got my '46 CJ up and running, I replaced the clanking U-joints. Then a couple months they were clanking again. Thought cheap replacement and got better ones. Couple months... again. My buddy Tom came in as i was pulling shaft and said "didn't you just replace those" I said yep, twice. All grooved up again. He noticed the yokes didn't quit line up. I never pulled slip yoke apart, but apparently somebody had. It was off one spline. Reset splines, never had a problem after that. Now.....an old jeep not capable of much over 50mph and mostly dirt roads, I wouldn't have noticed a vibration anyway. ;D

Rattiac

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Re: How To Make A Spare Driveshaft
« Reply #4 on: March 14, 2019, 02:12:11 PM »
Yeah I have the SYE (slip yoke elimintor).

chopper526

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Re: How To Make A Spare Driveshaft
« Reply #5 on: March 14, 2019, 05:33:18 PM »
Speaking of driveshafts, can anyone recommend a company to make me a new one. The one I have in my coupe right now is an inch or two, too short.
Tighten it up til it strips, then back it off a quarter turn

FATnLOW

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Re: How To Make A Spare Driveshaft
« Reply #6 on: March 14, 2019, 10:32:12 PM »
Can't you get a longer front yoke??   Cheaper than building one ..due to buying new yokes  anyways......
« Last Edit: March 14, 2019, 10:34:54 PM by FATnLOW »

chopper526

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Re: How To Make A Spare Driveshaft
« Reply #7 on: March 14, 2019, 10:44:02 PM »
The front yoke is pretty long, but the longer the yoke just means the "U" joint is further away from the tail shaft, and I think that causes the ability for more wobble in the "U" joint, and the shaft, overall......at least that's what I am thinking.
Tighten it up til it strips, then back it off a quarter turn

FATnLOW

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Re: How To Make A Spare Driveshaft
« Reply #8 on: March 14, 2019, 11:06:19 PM »
Speedway has front yokes from 5.5" to 8" long. ..guess your concern of the long yoke putting more pressure and wobble would be a question for driveline shops... :-\ :-\

chopper526

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Re: How To Make A Spare Driveshaft
« Reply #9 on: March 14, 2019, 11:25:01 PM »
Yes, exactly. For example: I don't want the U joint to be 8" from the end of the tail shaft if the optimum distance is 4". The rpm's of the drive shaft and the force on the U joint I imagine could be pretty substantial and increase as the U joint is moved further away from the end of the tail shaft. I think the best, safest solution is a new driveshaft.
Tighten it up til it strips, then back it off a quarter turn

 


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