i just installed a six inch lift in my 76 chev /12 ton, i am being told by my local driveline shop that they cant make me any driveshafts cause of the pinion angles,the shims that came with my springs i thought would be enough for the lift, what are some things a can do? or what do i have to do? do i have to run a cv shaft? or will shims be enough? the transfer case is not dropped at all. thanks for the help

Here's an idea.Search pinon angle.Do some reading.There should be no problem with a 6" lift.

1. Are you sure that the shims that came with the springs are installed
correctly? The thick end should be to the rear to rotate pinion up.

2. I do agree that a six inch lift should not cause such an issue,
But if it is, you could always move the spring perches....

Do you have an angle finder? If not then go pick one up. With no CV on your shaft your pinion angle should be close to same angle of the transfer case output angle to work properly.

Here's some good reading to learn a bit on pinion angles.
http://www.4x4wire.com/tech/pinionangle/

Pinion angle needs to match the the t case output shaft angle.

For example, most drivetrains are installed with a 3* downwards tilt towards the rear of the vehicle.

Meaning an upwards pinion angle of 3* is ideal for proper operation.

Some applications like shortbox trucks can utilize a different method of driveshaft angle. They can use a double cardon shaft at the t case end, and change the pinion angle upwards pointing directly at the transfer case.

Really all your driveline shop needs to know is the distance from the yoke on your transfer case to the yoke on your driveshaft. This measurement is taking with the suspension at rest with the full weight of the truck.

Its up to you to work out the technicalities of the operating angles.

I have over that on my blazer and they made a regular cv shaft and they only went cv cause I asked them to.

The biggest problem that I see:

"...i just installed a six inch lift in my 76 chev 1/2 ton..."

Tell me you aren't running 35's as well...

All kidding (but not really) aside, if the employees at your local driveshaft/machine shop are too daft to figure it out in an hour or so, give Jesse a call or email http://www.highangledriveline.com/.

Cut and turn the axle to be 2 degree's down in relation to the driveline and throw the shims away - and run a c/v - Job done- Time 1-3 hours- Jess

k thanks, ya i talked around with some of the other shops here an the guy that was going to do it was a goof, a different shop was recomended, an now the shafts are made and are functioning, no problems