driveshaft issue after flip kit?

gary03l · February 7, 2016

We installed the mcgaughys 5/7 drop on my brother 2015 sierra single cab. front went smooth but the rear after the install we tried to put the driveshaft back on and it doesnt clear. has anyone had a similar issue?

Silver ice 6.2 · February 7, 2016

Drive line needs to be shortened

07Softail · February 7, 2016

No problems here.

RT

1911-A1 · February 7, 2016

Your diff is a lot higher now.looks like the truck is sitting on it's wheels.from your pics it looks like you just need to jack the frame a little to drop the axle and it looks like it will drop right in.make sure you have enough play in the slip yoke when you're done though.

good luck

gary03l · February 7, 2016

Your diff is a lot higher now.looks like the truck is sitting on it's wheels.from your pics it looks like you just need to jack the frame a little to drop the axle and it looks like it will drop right in.make sure you have enough play in the slip yoke when you're done though.

good luck

the truck was in the air. we pushed the drive shaft all the way in and it looks like if there was anyway to put back in, there wouldn't be any play.

1911-A1 · February 7, 2016

No more ideas here.Hope you're at least having some nice weather in Oceanside,I lived in Carlsbad long ago.

Best of luck

GeorgiaBII · February 7, 2016

Carefully remove the 2 end caps of the joint. DO NOT lose any of the rollers.

Slip the joint into position from the side and reinstall the caps.

That will get the shaft installed very easily.

But you will probably need to shorten the shaft.

First time I've ever heard of lowering a 4wd truck!

muddkatt · February 7, 2016

7 inch drop has taken all of the extra play out of the driveshaft. You will need to have it shortened, and balanced.

gary03l · February 7, 2016

Carefully remove the 2 end caps of the joint. DO NOT lose any of the rollers.

Slip the joint into position from the side and reinstall the caps.

That will get the shaft installed very easily.

But you will probably need to shorten the shaft.

First time I've ever heard of lowering a 4wd truck!

2wd

7 inch drop has taken all of the extra play out of the driveshaft. You will need to have it shortened, and balanced.

you know how much does it need be shortened ?

GeorgiaBII · February 7, 2016

ahhhh I missed that part for some reason.

BUt what I said will get the shaft back on for you.

07Softail · February 8, 2016

This is KRAY! KRAY! having to shorten a drive shaft after lowering!! Mine slipped in with 1 1/2 play GM is really off in manufacturing tolerances these days!

RT

GeorgiaBII · February 8, 2016

2wd

you know how much does it need be shortened ?

You will need to take a measurement from the pinion to the output shaft of the transmission. Take that measurement with weight on the wheels.

Take that and the shaft to the local drive shaft place and have them take care of it.

This is KRAY! KRAY! having to shorten a drive shaft after lowering!! Mine slipped in with 1 1/2 play GM is really off in manufacturing tolerances these days!

RT

Not really. GM designed the truck to ride at a given height. This gent has radically changed the geometry of the drive line. This isn't unexpected.