rear drive shaft confusion. looking for more real world insight

[JT88K5]

If you can find a cheap 241 from an 89 (found one for $100) and do the sye kit $500. Then get a new cv shaft $500. should work. Gonna have to shim the axle to make it 1-2 degrees under the shaft angle. I hav the same setup on my 87 k5. No vibration at all up to 75 or 80. I'm scaret to go any faster. As someone else said earlier, do it once and do it right. Only because I had the money and would rather drive it than wrench on it repeatedly... well that and octane convinced me it was the right thing to do, glad I took his advice. If you do sye kit on a 241, make sure you have a heavy duty set of snap ring pliers $30.

 

[Mastiff]

I ran CV on my 208 slip yoke for years with no issues. The shaft was from Tom Woods, so I don't know if he changed his tune or what. I recently did the Tom Woods 208 SYE and it seems sound. I'm personally not convinced that there's any especially compelling reason to go to 241, though I suppose I would if I could get one for $100 - the case will be off the truck in any case. They were not to be found here in the required year, especially not for $100.

The SYE is certainly the right way, but there is expense and it's not a minor install job. The SYE CV will work, and IMO non-CV is pushing it with 4" lift and 14bff. My lift came out closer to 5" and the angles look pretty steep.

 

[brans87]

Here it is finished! Vibrations 95% gone think small shim will take care of that and make it ride like a dream.

1350 u joints and drive shaft is a monster compared to factory!

 

[Kenny78]

I know you have it finished, but for others they might look into adapting a dodge 208 for a fixed yoke rear. Not completely bolt in but can be cheap if you have good junkyards. For the double cardan(don't laugh) I used a front driveshaft with a conversion joint. It probably has 5-6000 road miles and decent amount of easy wheeling as the blazer still has 1/2 ton axles.

It sure eliminated the driveshaft vibrations.