1971 C10 pinion angle

[silver7]

Looking for any advice on the correct pinion angle for 71 C10. I need to replace my current 12 bolt housing and the replacement doesn't have the leaf spring perches in the correct location I need. Before moving and welding I want to make sure they are moved to the correct location to ensure an OEM pinion angle. I can't say the original housing was stock so I want to make sure I set me current housing at the currect pinion angle since the superlift springs I bought came with a wedge set to keep the OEM pinion angle. Thanks in advance for any advice!

[oldno7]

Well I was asking ?'s about the same thing not to long ago. The best I came up with is it should be around 2-3 degrees down so when you accelerate it will twist upward If your truck is still together take plenty of measurments and try to mark everything the best you can to realign everything. You can usually pick up sometype of angle measuring device from your local farm store try to get a measurment with the driveshaft in the truck then you can use that same measurment when you put the new housing in measure how far out your current housing is on each side (from the frame) like they say measure twice and cut once hope this helps a little oldno7

[silver7]

I have heard 2-3 degrees to the driveshaft and to ensure the transmission to driveshaft angle is the same as the pinion to driveshaft angle. I will have traction bars installed so I won't get as much axle wrap. Thanks for the advice!

[LONGHAIR]

Originally Posted by silver7

...the superlift springs I bought came with a wedge set to keep the OEM pinion angle.

If you are really using lift springs on the rear, this must be a 4x4?

Lift springs bring in a whole new perspective here.....
The wedges are there to tip the pinion up to reduce the over-all angle. Although I wouldn't say that this is exactly the correct thing to do, it is the easiest and cheapest, that's why the lift companies do it.

[silver7]

Yes, my truck is a 4x4 and has 6 inch Superlift lift springs. I understand the reason for the wedges, I just wanted to bring my pinion angle back to oem specs so the wedges which came on my new springs would put my pinion angle where it is supposed to be. If I don't set it right the wedges on the springs may cause issues when I get them installed. Thanks for the help.

[leddzepp]

Lowering your transfer case also helps.

[silver7]

I measured my current angle on both my current and soon to be axle housing with a magnetic angle finder and they both show a +10 degree angle.

[sgt1022]

I'm running into same delima. My C10 is 2wd with 3"lowered rear springs and 2"dropped spindles. My front end weight isnt exact though. Front end isnt completed. Should I wait until everything is back together to check pinion angle?

[HO455]

This thread should help. And if you look at page 14 towards the bottom of my WMB thread below I have some info and photos of my 2wd Burban angles and how I adjusted them.

http://67-72chevytrucks.com/vboard/s...d.php?t=522180

[HO455]

Originally Posted by sgt1022

I'm running into same delima. My C10 is 2wd with 3"lowered rear springs and 2"dropped spindles. My front end weight isnt exact though. Front end isnt completed. Should I wait until everything is back together to check pinion angle?

Yes, you should.

[HO455]

Originally Posted by silver7

I measured my current angle on both my current and soon to be axle housing with a magnetic angle finder and they both show a +10 degree angle.

Were they both installed and the vehicle at ride height and loaded normally?

[Sheepdip]

Originally Posted by silver7

I have heard 2-3 degrees to the driveshaft and to ensure the transmission to driveshaft angle is the same as the pinion to driveshaft angle. I will have traction bars installed so I won't get as much axle wrap. Thanks for the advice!

This is the correct angle to shoot for in the down position to allow for axle torque, you do not want it flat as it will not rotate the needle bearings and they will soon flatten to make a clunking noise.