Hey guys, Im wanting to lower my 2014 RCSB. Ive read so many threads that my head hurts. Im just wanting an aggressive stance without getting too crazy with the suspension. Im looking at the 2/4 drop kits and was curious which would be best and any issues I would have. Ive heard of some guys having problems with the driveshaft and was curious if this was an actual problem or just a case by case kinda basis. Any help would be appreciated!
Go w/ the Belltech kit. I had tons of issues w/ rear swar w/ the Mcgaughys kit even WITH a Hellwig rear sway bar. I have a 2016 R/T w/ 27,000 miles, had 15,000 when originally kit installed. I never could sort it out. Here was all the issues w/ the Mcgaughys kit that I had w/ ride quality & sway.
1st the sway bar endlinks supplied are 2.5" too short to make the rear sway bar level. The sway was cocked upwards too much. Installed the Hellwig rear adjustable links to get the sway back level w/ the frame. That helped but didnt solve.
2nd the kit uses the stock shocks. Installed the Belltech Street Performers. No luck, same problem. Rides much better but same problem.
3rd the Mcgaughys panhard bracket is 1" too long resulting in the panhard being unlevel. I installed the Belltech bracket. The Belltech bracket is 4" center to center where as the Mcgaughys is 5". Again that helped but didnt solve.
4th I cut a coil off the springs to help level the truck & the panhard a lil more. The truck sat 2" higher in the back than the front w/ the untouched Mcgaughys springs. That leveled the truck better & got the panhard completely level but the sway was much worse. The rear of the truck felt very unstable & like it was on ice skates.
So now I have givin up on the Mcgaughys rear kit completely. I ordered the rear Belltech kit from Summit for $140. The Mcgaughys kit isnt built right. The springs only lower a reg cab 3" instead of 4" the panhard bracket & end links wouldnt line the suspension up right until the truck is at a 5"+ rear drop. So w/ that being said nothing in the rear kit lines up w/ each other to correct the geomatry.
Also note worthy all bolts torqued to spec. No loose bolts or loose jam nuts on Spohn panhard bar.
The truck w/ the Belltech rear kit rides much better. No rear sway so far(has been installed for about 500 miles so far) alot less body roll, panhard is level & the truck is almost level. Much better.
We will see how the Belltech kit compares over time & on the track. I have heard of several people who have swapped who are very happy. I couldnt even make a full 1/4 mile pass w/ the Mcgaughys kit on my truck.. At 90 mph & above it was scary.
QA1 TS-905 shocks are supposed to help w/ the problem but $350 for 2 shocks is a hard pill to swallow.
The driveshaft issue is just the reg cab 8 speeds. They are failing due to reaching critical speed, not due to poor alignment. They reach critical rpm at 5350 rpm which is reached at 130 mph on factory tires & 110 mph on short track tires. Just dont get up to 130 mph & you should be good. There is a fix that Matt from Moes is working at the moment w/ a driveshaft shop.