Tremor with TSB 20-2277 - Shutter on Acceleration

[MIBuckeye]

My ‘21 ranger tremor developed a vibration after putting around 1000 miles on the truck . Purchased in Nov of 21 . I took the truck to the dealer maybe three times and got into at least one heated conversation with the mechanics there. My ranger started vibrating at around 40 mph, then would stop around 45 mph, then start again at 55 mph, and stop again around 60 mph. And then around 80 mph it would start again . The vibration was a high frequency constant vibration at the lower speeds from 45-55. The higher speed vibrations were intermittent. They would start and last for 20 seconds or so then fade out for 20 seconds or so and repeat . The vibrations were the worst at 55 mph. The dealer claimed it was a characteristic of the tremor model and basically said it was the off-road suspension causing the vibrations. I didn’t accept that. After speaking to the dealership manager I was told it “could be “ the torque converter and was assured the vehicle was covered under warranty if it were to fail. I then requested the NVH testing and the dealer flat told me no and there was nothing further to discuss or they could do until there was a failure. So I started looking at the vehicle myself. The vibration apps I downloaded were telling me mostly wheel or tire issues. I purchased and installed a new set of mud tires stock size. Vibrations persisted. Purchased a new set of wheels and installed, vibrations were almost completely gone but still had some shaking. Come to find out one of the new tires was out of round. Got it replaced under tire warranty and sold that set and bought a new set of nitto trail grapplers. Vibrations gone completely. My local tire shop told me one of my stock wheels was warped from the factory. Put it on the tire balancer and spun it and the runout on the outer edge had maybe 3/8” of variance. The other 3 had very little and couldn’t be noticed with the naked eye. The bad one had a serious wobble going on. So a couple thousand dollars later and I found the problem . I added a 1” level kit somewhere along the way also which had no effect on the vibrations . BUT…. Since Ive solved my vibrations issue i have tried out a 2” level lift and a 1” shackle lift for the rear. The vibrations came back when I had that lift on the truck but only from 65mph and up. I removed the 1” shackle lift thinking the rear is what caused the new vibrations but there was no change. The vibrations were still there . I took the 2” level kit off (front) and put the 1” level back on and vibrations were gone again. My guess is the vibrations were coming from the front cv’s with the 2” level. Some trucks may handle the 2” with no problems but mine will not . I did find a diff drop kit that I considered but figured the truck looks great with the 1” level and 1” wheel spacers and left it as is. So many places vibrations can come from just thought I would share what fixed mine .

Ah man. Feel your pain. Thx for the info. My vibration persists and I've all but given up. Went away with new set of K02s now it back. Exactly at the same speeds you mentioned. Dealer road forced again and says its the tires. Some days it's smooth as silk though. I've got a few months left on my lease and then I'll just give it back and get another (once i can order one)....but I'll be putting a good 50+ miles on it before I sign the papers this time. Glad you figured yours out!

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[MIBuckeye]

I forgot to add that after running the vibration apps I asked my brother n law who owns a ‘21 ranger sport 4x4 if we could swap our wheels and tires one day to see if the vibrations followed my set to his truck . And yes they did. And my tremor was smooth as glass with his set . This told me for sure where my problem was . Either wheels or tires . And yes The tremor looked like it skipped leg day with the sports wheels and tires on.

Dealer did that with mine too and claimed similar results..

 

[burnkill]

Is everyone with a Tremor experiencing this?

 

[JalanX]

Is everyone with a Tremor experiencing this?

21 tremor stock. Owned for about year and a half now and not one vibration. It’s actually one of my favorite vehicles I have had for long distance high speed driving. Smooth at any speed & comfortable seating position for me. Great power in the mountains or for passing. Feel awful for those chasing vibes. Good news about finding out the stock wheel was out of spec causing it in that case.

 

[JasonTremor]

21 Tremor here with about 9800 miles and very smooth so far for a truck.

If a shop is road force balancing tires properly and is trained on the equipment, they should be seeing any out of round tires or wheels in the process. If they road force balance all four tires in under 45 minutes, I argue they arent doing a proper job.

 

[Dgc333]

Is everyone with a Tremor experiencing this?

I have almost 19k miles on my 21 Lariat Tremor and have not experienced any vibration. The truck is as smooth as glass.

 

[burnkill]

Cool, thanks for the feedback! I have a Tremor on order.. was beginning to get a little nervous!

 

[burnkill]

21 Tremor here with about 9800 miles and very smooth so far for a truck.

If a shop is road force balancing tires properly and is trained on the equipment, they should be seeing any out of round tires or wheels in the process. If they road force balance all four tires in under 45 minutes, I argue they arent doing a proper job.

TIL - didnt know what road force balancing was until now. Awesome - good to know! Thanks!

 

[WingShot]

Is everyone with a Tremor experiencing this?

Nope.

 

[Dgc333]

If they road force balance all four tires in under 45 minutes, I argue they arent doing a proper job.

Gee!!! My son has a tire and service center. He road force balances all tires and it does not take any longer than spin balancing, maybe 5 minutes a tire. The only difference is instead of the tire/wheel being spun by the hub in air the road force balancer has a drum that applies pressure to the tire and spins it.

 

[JasonTremor]

Gee!!! My son has a tire and service center. He road force balances all tires and it does not take any longer than spin balancing, maybe 5 minutes a tire. The only difference is instead of the tire/wheel being spun by the hub in air the road force balancer has a drum that applies pressure to the tire and spins it.

Here is a good example of road force balancing. 5 minutes per tire is outstanding!

 

[Dgc333]

Here is a good example of road force balancing. 5 minutes per tire is outstanding!

My son has the same Hunter machine in his shop. It really doesn't take but a few minutes per tire.

 

[EAC83]

I just cant leave well enough alone!...... So I ordered a diff drop kit and decided I would give the 2" level and 1"rear shackle lift another go . Installed both lifts and drove the truck for 2 days. The vibrations came back instantly but where not at severe as before and felt slightly different . Was not intermittent but more of a steady persistent high frequency vibration. Installed the diff drop and the vibrations went away and is as smooth as it was the day I drove it home from the dealer. My take away from all this is vibrations can come from many places and sometimes more than one place. My initial vibration problem came from a bad wheel . Once corrected I found that too much angle on "my" trucks cv axles will induce vibrations at highway speeds also. Some trucks may experience this. Some may not. The manufacturing process of the these cv axles could be on the looser end of the quality spectrum so that "most" will never have an issue and "some" probably will at some point. But that is most definitely one of the sources of the vibrations I've experienced. Now my truck sits the way I originally wanted it to and drives like it should.

 

[Dr3wDrop]

I just cant leave well enough alone!...... So I ordered a diff drop kit and decided I would give the 2" level and 1"rear shackle lift another go . Installed both lifts and drove the truck for 2 days. The vibrations came back instantly but where not at severe as before and felt slightly different . Was not intermittent but more of a steady persistent high frequency vibration. Installed the diff drop and the vibrations went away and is as smooth as it was the day I drove it home from the dealer. My take away from all this is vibrations can come from many places and sometimes more than one place. My initial vibration problem came from a bad wheel . Once corrected I found that too much angle on "my" trucks cv axles will induce vibrations at highway speeds also. Some trucks may experience this. Some may not. The manufacturing process of the these cv axles could be on the looser end of the quality spectrum so that "most" will never have an issue and "some" probably will at some point. But that is most definitely one of the sources of the vibrations I've experienced. Now my truck sits the way I originally wanted it to and drives like it should.

Which drop kit you go with? This is the one I installed and I have had no issues.

 

[EAC83]

Literally the one off Amazon offered by the The Suspension Specialists. I was skeptical about the price and quality initially but after receiving, the parts seemed thick and robust . Installation took about 30 minutes . Only issue I had was this simply drops the diff only and does not drop the mount on the passenger side. However, it did manage to drop the passenger side 3/4” and the driver was just over 1”. Worked out great and no more vibrations. Here is the one I installed .

https://www.amazon.com/Differential...pd_rd_i=B0861JS8QT&psc=1&ref_=pd_bap_m_rp_1_i

sorry not great at posting links . So far no issues

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