Which way to add a tapered block

[thebird00]

I know the driveshaft angle thing has been covered alot, but I was helping a bud put a lift on his 93 Dodge which is new front springs and a block in the rear. The block is tapered pretty good. My question is which way should the taper go? With the taper like superlift recommends it (short to the front and tall part to the rear), it puts the differential and driveshaft at zero angle. The angles are about equal between the T case and diff with the block turned around. Just looking for opinions. Thanks

 

[jamber2541]

you have it right, short side forward and tall side to the rear

 

[thebird00]

If it isn't a cv driveshaft shouldn't the diff angle be equal to the transcase angle though?

 

[DEMON44]

yes. ideally

 

[thebird00]

So would you have the diff pointing down and the angle right or would you have the diff up and the angle at zero? I always thought this would give you vibrations and make the u joints fail cause they were operating at zero angle.

 

[4X4HIGH]

I think you are measuring the angle incorrectly. In order to have zero angle the pinion has to be pointing straight ahead. Every pinion i've ever seen points up slightly.

 

[thebird00]

I'll try to get some pics up with it both ways. When I put my cv shaft in my longbed I was told to move the perches to line the pinion and driveshaft up with 1-2 degrees angle down to allow it to run at zero under throttle. I thought with no cv, the pinion and transcase where supposed to be parallel.

 

[4X4HIGH]

That is correct. If you're measuring correctly then don't worry about which way the blocks are installed as long as the angles are correct.