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I've successfully replaced my carb, my water pump and installed a petronix kit, can do timing, plugs etc.

How difficult is the universal job? My concerns are the leaking auto trans at the yoke after I pull the driveshaft. Will an old rag stop the flow? My parts stores sell two different replacements, one with "outside" snap rings. Which do I need?

My car is a '66 GT 289 4 bbl automatic. I have a '65 Mustang factory manual, plus Chilton and Haynes for reference.

I have a serious vibration in the driveline which these mauals strongly point to the driveshaft as the culprit.

Thanks in advance for your help.
 
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A bad ujoint will often clunk coming from a dead stop.

If you want to do it yourself, go right ahead - it's not a hard job at all. If you don't have a plug for the tranny tailshaft (you can buy one at autozone), simply keep the front wheels on the ground and raise the rear on jackstands. Otherwise, a quick stuff of a rag will get most of it.

PS: if you don't have a large bench vise it's considerably harder to do this yourself...

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No biggie...you can do it..

But first...put the car on stands and inspect your u-joints and rear trans yoke...

Check the front and rear u-joints for slop while the driveshaft is still in the car by attempting to wiggle it back and forth in the different planes of the joint.

You can pull the rear u-joint....carefully... and inspect the cups for slop....just leave the front yoke in the back of the trans...

Try wiggling the front yoke in the back of the trans...you might feel a slight play but shouldn't be able to see anything...(clearance shouldn't be much over.005")...any more and you'll need to inspect the yoke and possibly replace both it and the bushing in the trans...

Do your diagnostics first and get back to us.....some of the repairs you can easily do and others might be best left to a shop...

Good luck!



Pat
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As far as the snap rings go just look at the ends of the cups on your current u-joints. If you see those C shaped wire clips up against the outside flat ends of the u-joint cups those are outside snap rings. I think on the mustang the snap rings are only on one pair of the cups or maybe it depends how thick your drive shaft is.

I had to take mine down to my local Napa for them to measure to make sure they ordered the right ones. Also, the Spicer joints are supposedly the best so you might as well get the best.




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if you have access to another car then take the u joints out and take them to a parts store to compare. Also to compare if the ends are the same size. Aparently for a 69 302, on 1 u joint it had 2 size ends. That way you'll know if they are in or out snap. Mine were in, but I think my driveshaft came off a different car. To prevent tranny fluid spilling park the car on a decline facing downwards or chock the front and put the rear up high jack stands. Also, rumbling from the driveshaft could be because it isn't balanced.
 

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Hmmm, I must be missing something ... in all the U-joints I've replaced in my lifetime, I've never plugged the tranny tail shaft, and never lost any fluid because of it. I guess it's because I find the easiest way is to lift the rear and put it on chack stands preventing fluid loss just from it flowing to the front?

U-joints, IMHO are very easy to replace, but I like lotamud's advice of taking out the existing and carrying them with you to the parts store to compare.



If you always do what you've always done,
You'll always get what you've always got

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