SpeedViktm

2013 SCab STX, Belltech 2-3" shackles. 2 piece driveshaft.

No shim - Vibes around 45 and 65
2.5* shim - Vibes around 45, don't recall any other vibes even up to about 120. I don't drive 45 very much.
4* shim - Vibes around 65, haven't had the truck over about 80-90 and they didn't come back. 65 is not unusual for me to drive.

Sent pictures of my carrier to McGaughy's to see if the 70014 relocator will work, supposedly they sometimes fit and sometimes don't.

808MIKE

Wow all those Shims and still you got vibes at high speed. Most I read are Low Speed. I had a Slight Vibe at like 15-20mph...with my DJM 5 inch Rear Flip. Although I Had problems trying to get the damn Vibe out. Finally took it to my Mechanic frnd and he Adjusted it in about 2 tries...and Viola! It's the smoothest it's ever been since I dropped it. LOL...Only a real faint Vibe at 15-20. It Vibe free at all speeds even at 120. HAHA. I stuck with this kit as I did not want to cut up the Stock Location...In case I ever sell it I can return it to Stock no problem! Good Luck man!

SpeedViktm

I haven't put it on yet, and it's kind of a one-way trip, but I have a McGaughy's relocator to put on. In the mean time I put the 2.5* shims back in...