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73-87 Chevy _ GMC Trucks => Brakes, Frame, Steering & Suspension => The Lows (Lowering/Drops) => Topic started by: 4chevyman on October 05, 2009, 04:30:27 pm

Title: pinion angle
Post by: 4chevyman on October 05, 2009, 04:30:27 pm

everyone talks about having the correct pinion angle after lowering, but noone says what it is.  What is the correct pinion angle for a 1/2 ton longbed and the correct way to find it?  I know I will have to get one of those angle finding dohickies at the Home Depot, but where is the correct place to put it on the pumpkin?  I'm quite aways off from setting it as the truck is total taken apart.  I painted the frame last weekend.  I would imagine that one would need to have the truck totally assembled so it would have the correct weight/ride height.

Title: Re: pinion angle
Post by: Captkaos on October 05, 2009, 04:33:27 pm

This has been discussed here, but...
put it on the end of the yoke of the rearend and it should be about 3-4 degrees UP
put it on the END of the output shaft of the transmission (on the seal face) and it should be 3-4 degrees DOWN.

Title: Re: pinion angle
Post by: 4chevyman on October 05, 2009, 04:44:26 pm

Thanks again, Captain!  Hey do you ever go out to pullapart.  I love that place.  so much junk, so little time!

Title: Re: pinion angle
Post by: HAULIN IT on October 05, 2009, 04:45:37 pm

 Yes, you want it as close to "driving weight" as possible. Setting it up with the bed, back bumper, gas tank, ect. off (while it would make it easier to do ;)) will not give you accurate data for going down the road. Lorne 

Title: Re: pinion angle
Post by: Captkaos on October 05, 2009, 04:58:38 pm

I go every once in a while. 

Do you live in Brookwood?  I am there everyday.

Title: Re: pinion angle
Post by: VileZambonie on October 05, 2009, 04:58:48 pm

http://www.carcraft.com/howto/91758/index.html

Title: Re: pinion angle
Post by: 4chevyman on October 06, 2009, 12:25:33 pm

Yeah, I live close to Rocky Branch which is west of Brookwood on 216 toward t-town

Title: Re: pinion angle
Post by: Captkaos on October 06, 2009, 01:11:40 pm

Ah different brookwood then I am in Birmingham.