Ok so now that I have my new posi rear end in need new u joints. While I have the driveshaft out was going to have it checked, balanced etc. Now I've been thinking would it be better long run just to get a custom driveshaft ? For strength and longevity.

The local shop i'm going to deal with has prices listed on their website starting at $255.

Just looking for thoughts and opinions.

http://www.driveshaftspecialist.com/...Performer.html

 

Some of these cars had two piece drivelines with the rubber sleeve inside. Personally, I've not had problems with those failing, but some people have replaced those to avoid future problems. If your driveline is one piece I think you should be fine. For a street driven car with a little time on the race track I think you'll loose a u-joint before twisting the driveline. If your into serious racing then maybe it would be worth upgrading the driveline. My 2 cents worth. John

 

If it is solid and no rubber and is NOT all scaling rust...Keep it and have it balanced.

IF you have any doubts or dents in the rear REPLACE it if you can afford it. Jim

 

I was told if I'm going to exceed much more over the stock HP ratings of my engine, I should replace mine.

They said the rubber sleeve inside is 40 years old.
Then he asked me if I knew what a 40 year old rubber component looked like.

$255 is a small price to pay instead of seeing what can happen when they fail.
Is that utilizing all the same yoke, and U-joints you have ?? Sounds like it is

However, if you don't have alot of HP, keep the stocker.

 

Shafts fatigue, and it doesn't take a lot to twist one off. For that matter, yokes wear out too, and should be replaced. A newer shaft is going to be lighter, and you can upgrade to 1350 joints, never having to worry about it again basically for as long as you own the car. You can get away without replacing the yokes, but if you upgrade to 1350s, you'll have to run conversion joints, which is not only a pain, but becomes the weak link.

I say for the piece of mind, replace it, and the yokes/u-joints, going to 1350s. And if you ever do throw more power at it, you won't have to worry.

It may cost just as much to balance the old shaft as it would be to replace it, since I believe they have to take it apart. (to remove the rubber).

.

 

[quote=g77rvd;234022]Ok so now that I have my new posi rear end in need new u joints. While I have the driveshaft out was going to have it checked, balanced etc. Now I've been thinking would it be better long run just to get a custom driveshaft ? For strength and longevity.

The local shop i'm going to deal with has prices listed on their website starting at $255.

Just looking for thoughts and opinions.
[quote]
After I installed a rebuilt rear end, it needed a shorter driveshaft. So I had a new one piece built for $225 with new u-joints so that's not a bad price.
Rob