CV driveshafts

[GaryMB]

I'll be needing to know what pinion angles to set when I install my dana 44's in my CJ; I know that I'll need a CV for the rear to accomodate my 4.5" lift, which means pointing the pinion strait at the T-case. What about the front, though? Do they often require CV's like the rear does (I'm hoping to be able to use 4x4 at high speeds for going up to the mountains in the winter)? Also, I'll be doing a shackle reversal, so the front shaft will need to be able to compress/extend more than the stock one. Any ideas on what pinion angle to set in the front, and any suggestions on where to get driveshafts besides the local driveline shop?

 

[Joopin]

I did my SOA, put a CV in the rear, and just had the front shaft lengthened. No need for a CV in the front for 4.5".

 

[Bounty__Hunter]

You don't 'need' a CV shaft in the front, just set the front pinion angle the same as stock so the caster is the same as stock.

Driveshaft 401 Should be all you need to know on setting pinion angle for the proper ujoint angles, but in this instance I think the caster should be priority for proper handling, with not enough poor ujoint angle to notice.

 

[redrooster]

4wd won't stay engaged

Bounty is right. Set the pinion angle in the front the same as it was from the factory for the vehicle it came out of. Otherwise a cut and turn of the knuckles will be required to get the caster correct.
More than likely you won't need a CV in the front.
I would set the rear pinion angle 3 degrees below pointing straight at the transfer case yoke. That way you will compensate for sagging springs over time and also for when you hammer down and the pinion wants to rotate upward.
When you move the perches either front or rear, merely tack weld them in place until you get the supension finished and have the drishafts installed. When you are satisfied with the location of your shaft and pinion you can go back and weld them in.

 

[currupt4130]

RE: engine dies? is it overheating?

when you do the front, ideally you want the pinion at the same angle as the transefercase output. having it a little off wont hurt much, just be careful its not too much. its not like your dricing it on the street in 4wd much, right? you shouldnt have any problem if its not perfect