Quick suspension/driveline question.

[W7NB]

For those who saw my Yeti build thread my latest add was a 4 inch rough country lift kit. The truck looks and drives good and was level to begin with, but as soon as I loaded in my tools and search and rescue gear (probably 300+ pounds) the back end is low again. Also, when I did the lift even with the wedge to turn the back axle up my driveline is a little short for my taste and has developed a shake ove 60mph.

I need to crawl underneath tonight and change the fuel filter and install my lengthend rear brake line, and was considering installing my zero rates to level the rig back up. So question is, while I'm doing that should I slide my axle forward an inch or inch and 1/2 to gain back some driveline? The drive angles aren't bad so I don't think that would be a problem but am I opening myself up to other problems?

 

[resurrected_jimmy]

if you flex much you are setting yourself up to crunch some sheet metal. I don't think moving your axle forward is going to help with the vibration either. You really just need to get your shaft re-tubed to the proper length and have it balanced.

 

[gmc4cw]

if you move the axle down one inch and then move it forward one inch your angle is going to get worse then it is now. You have a couple of options. I would install the zero rate and move the axle back one inch. then have your driveshaft lengthened. or a slip yoke eliminator kit for the t-case would help with the driveline angles. but then you would need a different shaft then the one you have now.

 

[BigEasy]

Did you install new U-joints when you did the lift? If not, maybe the little bit of extra angle is killing one of your old joints.

And a question for anyone that knows, is there an aftermarket SYE kit that will allow us '90-91 guys to keep the electronic speedo sender? Or if we use a Dodge back half to kill the slip yoke, do the '90-91 Dodges have the same speedo sender?

 

[pauly383]

Mine was level as can be , maybe a little higher in the rear , until I kept adding stuff to the truck .

Try moving some forward , I.E storing things closer to the front of the rig .

Vibes is why they make CV shafts . Easier way out from a work standpoint .

 

[W7NB]

I need to empty mine back out and see if I am level or a tad high and see if it changes the vibration. It's not there (or at least not noticeable) until 65 mph or so. I'll take pictures of the driveline angles and post them tomorrow and see what everybody thinks.

I did put in new u-joints when I did the lift, but they have been known to be bad. I grabbed the shaft and wiggled it but don't feel any slop.

 

[55Willy]

I grabbed the shaft and wiggled it but don't feel any slop.

sorry I had to

 

[W7NB]

sorry I had to

Doah!!!