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 Post subject: Driveshaft Problems
 Post Posted: Wed Oct 07, 2009 10:41 am 
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After I tore up a bunch of stuff with the reverse at the stripe deal last fall, I replaced the drive shaft because one of the ears on the shaft yoke was loose to where the U joint cup would fall out. Got a new shaft and had it balanced and when I installed it there was only about .005 runout on both ends, which is acceptable. Well, as time has gone by I've acquired a vibration up on top end that has gotten worse.

This morning I jacked the car up to check the driveline and I put an indicator on the shaft at the transmission yoke and now I got .025 runout and the joint is LOOSE inside the shaft yoke???? The cups appear to be tight but the cross bar seems to move side to side inside the cups. So I went to the pinion yoke end and check that and it's got .015 runout in it????

There is NO side to side play in either the slip yoke or the pinion yoke? It's all in the yokes on both ends of the shaft itself?

So, has anyone else run up on this problem before?

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 Post subject: Re: Driveshaft Problems
 Post Posted: Wed Oct 07, 2009 1:48 pm 
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Well, looks like more money to spend! Found out that the driveshaft yokes that most shops use are NOT strong enough for my application! Strange states that they aren't good for over 700HP and that's the reason I'm having the problems with'em. There is a 4130 forged weld on yoke that they sell for high power applications, which they recommend being welded to a 4130 tube.

So looks like I'm going to have to shell out big bucks for a driveshaft now? DAYUMNIT!

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 Post subject: Re: Driveshaft Problems
 Post Posted: Wed Oct 07, 2009 3:51 pm 
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It's good that you got it figured out without testing the DS loop O:) . I've never had a problem with mine and I have always had Republic (local shop) build them.

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 Post subject: Re: Driveshaft Problems
 Post Posted: Wed Oct 07, 2009 4:21 pm 
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Ken, I got mine here and it's guaranteed..If you beak it they replace it
http://www.dennysdriveshaft.com/

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 Post subject: Re: Driveshaft Problems
 Post Posted: Fri Oct 09, 2009 11:54 am 
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Barry, NOWHERE in his ad does he state that he uses 4130 shafts or yokes? At least I couldn't find any reference to that.

Ok so I went to pick up my driveshaft from Truck Body and Kenny, the guy that does them told me that the yokes on that shaft were made in Korea and that may be the problem. So he offered to make me another one at cost with Spicer yokes instead so I'm going to give it one more try. He is going to send the old ones back to the manufacturer to see if they will pay for replacing them.

Did I mention that I'm cheap? ;-)

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 Post subject: Re: Driveshaft Problems
 Post Posted: Sat Oct 10, 2009 7:11 am 
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http://www.dennysdriveshaft.com/p991_3. ... ckage.html


Being cheep can get you in trouble most of the time and going over a buck fifty I just didn't want to have that thing swinging around in the car with me O:) ...

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Last edited by Beretta on Sat Oct 10, 2009 8:56 am, edited 1 time in total.

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 Post subject: Re: Driveshaft Problems
 Post Posted: Sat Oct 10, 2009 7:22 am 
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Ken0069 wrote:
Did I mention that I'm cheap? ;-)


LOL,....is this possible and race also??? You have to hate money if you decide to go racing. I tell my friends who decide to go that it ought to be illegal. :---) Much more addictive then any drug out there and once you get hooked the habbit is almost impossible to kick.... ](*,)

Glad it was an easy problem to track down for you. Caught it at the right time aslo..

Don

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 Post subject: Re: Driveshaft Problems
 Post Posted: Sat Oct 10, 2009 10:12 pm 
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Location: Australia
two words for you Ken

" Mark Williams "

i know they are a little more expensive than any of the others but remember at speed its your life that you may be playing with, i would spend the extra for peice of mind

Remember
You carnt take it with you so you may as well spend it now

regards
rod

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