0235SS93

iTrader: (1)

I have a 2005 GMC Sierra 1500 RCSB 2WD. Right now it has DJM 2" rear drop shackles to level it out. I'm running 20" wheels wrapped in 275/55R20 rubber. I'd like to drop it 2 more inches all around. I'm on a tight budget and I'd like to maintain ride quality and maybe enhance handling. Below is a list of components I plan on installing. I just want to run them by you guys and see if I'm on track. Will I need a pinion shim kit? If so will I need 1,2,3,4, or 6 degree shims?

McG's 2" front drop spindles for 1500 2wd 16"+ wheels
McG's Shorter Rear Bump Stops
DJM 2" rear drop hangers
Belltech Sport Truck Street Performance Shocks all around
All for around $695+shipping
$720+shipping with pinion shims

Sound good?

Chris05

might add helper bags to the rear if not notch it.

gs7793

iTrader: (8)

sounds good to me! i need a 2/4 drop so bad..

budhayes3

iTrader: (19)

Sounds like a plan...just curious why you listed DJM hangers, and not Belltech or McG? Seems like I've read mostly negative about DJM lately.

As far as the shims go, you could measure your pinion angle or go with trial and error. When I lowered the rear of my 4x4 by removing the lift blocks and installing Belltech 2" drop shackles, I actually cured a vibration that I had around 65mph So needless to say, I didn't use any shims. If you did require shims, I'm going to guess that 2* would do the trick...but that's just a guess.

SLOXCAB

iTrader: (7)

add a c-notch kit to that cause you will hit every so often

budhayes3

iTrader: (19)

Occasionally...a notch is nice but not a complete necessity with a 2/4...

0235SS93

iTrader: (1)

A notch with a 2/4 drop? Really? Huh, didn't think that would be part of a 2/4...I went with DJM because they were cheaper. But belltech or McG's could be sprung for I guess. I don't have a lot of roads that are rough enough to need a notch really. there is a road to my friends house in town that's rediculous, but I can avoid it.

0235SS93

iTrader: (1)

How exactly would I go about measuring my pinion angle? And what is an optimum angle?

2001CamaroGuy

iTrader: (5)

pmed you... I'm selling DMJ hangers and shackles for $120 shipped (setup will give anywhere from 2"-5" drop depending on how you set them up). I never had a single issue with them and am only selling them since I went to a 4link/bags.

You don't NEED a notch for 4" but it's a good idea. I found I was really close to sitting on the bump stop when I had mine set at 4".

budhayes3

iTrader: (19)

You use a 360* angle finder with a magnetic base (sounds expensive but it isn't, you can get it at Sears, carpenters use them)....I haven't done this in a long time, but from what I remember, you attach the angle finder to the driveshaft and record the reading, then remove the driveshaft and put the angle finder on the face of the pinion yoke and record that reading, then find the difference in the two and adjust accordingly.

On different applications (such as drag racing), I've heard of guys adjusting their pinion angles to compensate for the torque that moves the rear end, but...I *think* that the pinion angle should be around -2 or -3* for most applications, but I'm not 100% sure. Hopefully someone who definitely knows can chime in. I do know that you want your pinion angle to be at 0 when the vehicle is under power