fillpot

iTrader: (1)

O




Ok guys 13 gmc ext cab lowered 7 and 4 with mcgaugheys kit, got some vibriation so checked the pinon angle and I'm at -1.5 haven't checked the trans, is this in the ball park? THANKS!

oakley6575

iTrader: (5)

You need to measure the the trans output angle and compare them to the pinion angle. Should pretty much be equal and opposite but the u joints need 1/2 a degree differential to oscillate and lube themselves properly.

fillpot

iTrader: (1)

Thanks bro, yea I'm going to get it up on some wooden boxes my buddy has tomorrow, he uses the boxes to scale cars, then I can check it all out good, I hope they'll hold the bitch up lol. THANKS!

fillpot

iTrader: (1)

Guys just done some checking and it looks like I'm 10 degrees up on the pumpkin and 0 on the drive shaft with the suspension loaded, what should it be. THANKS!

Jeebalow

iTrader: (3)

The trans and pinion should be parallel. So if your trans is 3 degrees down you would need the pinion to be 3 degrees up and then just make sure you have at least between 0.5 and 1 degree at each u joint to ensure they don't destroy themselves.

Edit-this is assuming a single piece drive shaft. 2 piece is a little different . Here's a manual from spicer/dana

fillpot

iTrader: (1)

Thanks bro good info!

iamkeniff

iTrader: (16)

where are you getting your angle at on the rear end? you are suppose to check it at the pinion yoke vs driveshaft not the actual rear end.

fillpot

iTrader: (1)

Yea that's where I'm getting it at, the trans spacer didn't help **** time to start shimming. THANKS!

iamkeniff

iTrader: (16)

Pull the trans spacer so you wont have to run as much shim imho.

Normally a MCG flip kit needs 4* shims.
Make sure you get the shim kit that has the new longer bolt. Stay away from aluminum if you plan on making power. Steel is where its at
Unless you want to get new leaf perches welded on like i did

fillpot

iTrader: (1)

That's where I was going to start, man the pinon seems real high though? THANKS!