When I get my 2WD 03 Crew, I want to lower the rear 2" to level it's appearance out. I was told that I would need shims for a one piece shaft and wouldn't need shims for a two piece shaft. Do the Crew's have one or two piece drive shafts?
Thanks, Jim

 

The SuperCrews have a one-piece aluminum driveshaft. You "may" need shims.

 

aren't their driveshafts steel?

anyway, i haven't heard of anybody needing shims for a 2" rear drop. So you should probably be fine. I just lowered my HD 2" and its the same lenght as your screw, so i wouldn't worry.

but i'm not saying that its a definate

 

It depends how you lower it. If you use the easiest way of putting in 2" drop shackles, then you do not need shims. I have a 2001 screw KR that I lowered the rear 2" with drop shackles, and have had no problems at all with it.

 

So from this thread I can infer that the back end won't ever "settle" to level?
And on the subject of lowering, who has done a 3-4 and can advise the amount of wheel travel they lost and any increase in ride harshness?

 

Thanks for all the responses guys, I appreciate it. I am planning on using 2" drop shackles. I may just have a shop do it, I was quoted $150 out the door. Then I won't have to worry about the shims, the shop should know and if it's not right, I can always take it back.
Jim

 

Its not that hard to do it yourself if you have a couple jack stands and a jack. Just put the frame on stands so the wheels are barely off the ground, jack up the rear axle a little to take the tension off. Take off 2 bolts on each side, put in the new shackles, put bolts back in, and lower the truck again. Took me about 10 minutes a side after the truck was in teh air. Pretty easy mod, and it will save you 100 bucks too

good luck

 

Yeah, it took me all of half an hour to do.

 

When I did mine I took a 2 foot level and set it on the flat part of the rear end housing and drew a line on my drive shaft, with the truck sitting on all four tires and level ground. I then installed the shackles and put the tires back on and let the truck back down, then I crawled back under it and put the level back on the rear end differential and checked the line I made previously, it was off by more than a half an inch so I raised the truck back up and took the u-bolts off the rear end and turned the factory shims 180 degrees, put it all back together and it was about an 1/8 inch out then. I have not noticed any vibration yet and I have almost 34,000 miles on it. With all that it only took and hour and a half and I took my time. Hope this helps and sorry for the long post.