Selec-trac Vibration While Stopped

[N75]

Hello all! Just traded in my 2019 Sahara 6MT for a factory ordered 2021 2-door Willys. Went with the 2.0t/8-speed which are fantastic, and also picked the Selec-trac transfer case to help keep the mud terrains grippy on wet/slushy roads.

Only about 650 miles on it, but noticed this right from the start something that doesn't feel normal.

- Shifting into 4-Hi Auto (either at a stop or while driving) is seamless
- Coming to a stop in 4-Hi Auto, say sitting at a light in gear with your foot on the brake, there is a vibration that can be felt in the pedals and steering wheel (can even feel in the seat)
- Letting off the brake and letting the Jeep roll forward stops the vibration
- Putting the Jeep in neutral or park gets rid of the vibration
- If you put the Jeep in park, kill the motor, foot off brake so it rolls/settles, then pull it out of 4-Hi Auto, it will roll/settle more like the T-case has load on it

I've tested the above in 4-Hi (so locked T-case) and it acts exactly the same. Obviously not driving locked in 4 on dry pavement except in a straight line for testing. There are no other vibrations, hesitations, or anything other than a noticeable impact on power when in 4wd. It's definitely slower which makes me wonder if the T-case is somehow binding and causing drag, but again everything else is smooth.

I've had lots of 4wd trucks (Nissan, Toyota, Ford) and AWD (torsen and haldex Audis, xDrive, etc.) and I've never had a transfer case/center diff feel like it's causing load when stopped under braking.

Wanted to check with other owners here before I make an appointment to get it checked out. Thanks!

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[Nicksdiner68]

Hello all! Just traded in my 2019 Sahara 6MT for a factory ordered 2021 2-door Willys. Went with the 2.0t/8-speed which are fantastic, and also picked the Selec-trac transfer case to help keep the mud terrains grippy on wet/slushy roads.

Only about 650 miles on it, but noticed this right from the start something that doesn't feel normal.

- Shifting into 4-Hi Auto (either at a stop or while driving) is seamless
- Coming to a stop in 4-Hi Auto, say sitting at a light in gear with your foot on the brake, there is a vibration that can be felt in the pedals and steering wheel (can even feel in the seat)
- Letting off the brake and letting the Jeep roll forward stops the vibration
- Putting the Jeep in neutral or park gets rid of the vibration
- If you put the Jeep in park, kill the motor, foot off brake so it rolls/settles, then pull it out of 4-Hi Auto, it will roll/settle more like the T-case has load on it

I've tested the above in 4-Hi (so locked T-case) and it acts exactly the same. Obviously not driving locked in 4 on dry pavement except in a straight line for testing. There are no other vibrations, hesitations, or anything other than a noticeable impact on power when in 4wd. It's definitely slower which makes me wonder if the T-case is somehow binding and causing drag, but again everything else is smooth.

I've had lots of 4wd trucks (Nissan, Toyota, Ford) and AWD (torsen and haldex Audis, xDrive, etc.) and I've never had a transfer case/center diff feel like it's causing load when stopped under braking.

Wanted to check with other owners here before I make an appointment to get it checked out. Thanks!

 

[Nicksdiner68]

Just wondering if you got the selec trac vibration resolved. I have the same issue. Thank you

 

[N75]

Just wondering if you got the selec trac vibration resolved. I have the same issue. Thank you

Nope, haven’t addressed it yet. I’m going in for my 5k service soon, I’ll be asking about it.

 

[Nicksdiner68]

Nope, haven’t addressed it yet. I’m going in for my 5k service soon, I’ll be asking about it.

Jeep at dealer as we speak and they refuse to acknowledge the vibration. They are basically telling me that the vibration is normal and get over it.
Keep us posted.

 

[DavidArmen]

Any resolution to this at all?

i added a post here for this same exact issue with my 2021 JLUR (3.6/8speed) when in 4H. Everything is perfect when jeep is in motion but when I come to a stop in 4H, there is a strong vibration inside the jeep, especially in the steering wheel. It’s especially concerning because it’s extremely smooth when I come to a stop in 2H, no vibrations of any kind. Mine has also been this way since the beginning and it’s now 15 months old and at 9k miles.

 

[N75]

I wound up selling my Jeep (2dr) as we have a baby on the way, so I never had it looked at. Likely going for a 4XE which has the same transfer case so still interested if anyone brings theirs to the dealer.

 

[BrandoHC]

Hello all! Just traded in my 2019 Sahara 6MT for a factory ordered 2021 2-door Willys. Went with the 2.0t/8-speed which are fantastic, and also picked the Selec-trac transfer case to help keep the mud terrains grippy on wet/slushy roads.

Only about 650 miles on it, but noticed this right from the start something that doesn't feel normal.

- Shifting into 4-Hi Auto (either at a stop or while driving) is seamless
- Coming to a stop in 4-Hi Auto, say sitting at a light in gear with your foot on the brake, there is a vibration that can be felt in the pedals and steering wheel (can even feel in the seat)
- Letting off the brake and letting the Jeep roll forward stops the vibration
- Putting the Jeep in neutral or park gets rid of the vibration
- If you put the Jeep in park, kill the motor, foot off brake so it rolls/settles, then pull it out of 4-Hi Auto, it will roll/settle more like the T-case has load on it

I've tested the above in 4-Hi (so locked T-case) and it acts exactly the same. Obviously not driving locked in 4 on dry pavement except in a straight line for testing. There are no other vibrations, hesitations, or anything other than a noticeable impact on power when in 4wd. It's definitely slower which makes me wonder if the T-case is somehow binding and causing drag, but again everything else is smooth.

I've had lots of 4wd trucks (Nissan, Toyota, Ford) and AWD (torsen and haldex Audis, xDrive, etc.) and I've never had a transfer case/center diff feel like it's causing load when stopped under braking.

Wanted to check with other owners here before I make an appointment to get it checked out. Thanks!

Did you ever find out what was causing this?

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