Ideal pinion angle is 1°-3° in stock applications; this is the guideline we’ve always used. We’ve had a few customers report a driveline vibration around 70mph when under power from the rear driveline. All have provided specs withing the 1°-3° range. We brought an affected vehicle into the shop and installed these 2° pinion shims which alleviated the issue.
The end pinion measurement on the two tested vehicles was 4° and 5°; both were perfectly smooth under power at all speeds. This caused us to toss the accepted 1°-3° spec out the window accepting the higher figure for lifted applications; after all, you can’t argue with results!
Please note, these will NOT combine with any lift block. Customers running blocks will need to seek a tapered block solution. These will also NOT work with OEM leaf springs or add a packs.
Customer Reviews
I bought the Carli Suspension 2° Pinion Shim Kit for my Super Duty to fix a slight highway-speed vibration. You know — the kind that makes you question your tires, your driveshaft, and sometimes your life choices. Well, let me tell you… this little wedge of aluminum didn’t just fix the vibration. It fixed my entire outlook on life. The moment I hit the highway after installing it, the vibration disappeared so fast I thought I accidentally entered a different dimension. My truck was smooth. My soul was smooth. Birds started singing. My credit score went up. I suddenly understood math again. But the real MVP? CJC Offroad. Their customer service is elite. I called with a couple questions and they treated me like I was ordering suspension for a trophy truck instead of a shim the size of a Pop-Tart. Friendly, fast, and they actually know what they’re talking about — rare traits these days. If your truck has a vibration, buy these shims.
After doing a level from Carli on my 2021 f250 I had a bad vibration/ grinding noise from the rear end. This kit solved my issue completely!
Super happy with the service I received! Can’t say enough on how these guys take the time and care to get a guy set up right! Works as advertised!
Thanks CJC!
I installed Carli 2.5"-3" pintop lift on my 2022 F250 Platinum. I noticed a vibration when traveling 75mph and let off the accelerator. I was chasing my tail. Luckily these 2° plates fixed the issue. No more vibration, no more grind noise. Customer service reps have been fantastic throughout the whole process! Thank you all!
