5 tire rotation on a 392 or 4auto t-case?

[stumblinhorse]

With all the issues caused by different tire sizes with past/current clutch t-cases, who is doing 5 tire rotations on JLs with the MP3022? Coming up on my first rotation with my 35s. Just don’t want the dreaded “service 4wd system” warning with tire size issues.

Sponsored

 

[multicam]

Do five tire rotations. Won’t you be more worried if you have to swap in a brand new spare when one of your tires pops and they all have 46,000 miles on them?

 

[stumblinhorse]

I changed the title since I am not sure some of 392 crowd knows what I am talking about.

Trying to find out who has done a 5 tire rotation on a 392 or any JL with the 4auto option. Someone that has done several tire rotations with or without causing a service 4WD error?

 

[Dyolfknip74]

I changed the title since I am not sure some of 392 crowd knows what I am talking about.

Trying to find out who has done a 5 tire rotation on a 392 or any JL with the 4auto option. Someone that has done several tire rotations with or without causing a service 4WD error?

I do 5 tire rotations every 5k kms with my non 392 auto tcase. In saying that, I have had Serv4wd pop up everytime I offroad. They've replaced tcase, DTCM and t-case motor and it's still doing it. Tomorrow it goes in for them to check some ground and there is also a position sensor that could be the issue as well.
Where did you see that doing a 5 tire rotation is an issue though? I personally don't think it's that at all. It doesn't pop up after a tore rotation, only off road and a few isolated incidents onrpad where gas was applied and wheels were turned in 4wd.

 

[garyji]

Can you help me with why a tire rotation would cause any issues, especially a tire size issue?? All 5 are the same size. right? You are rotating 5 every 5K right??
Not at all familiar with this issue.

G.

 

[stumblinhorse]

I do 5 tire rotations every 5k kms with my non 392 auto tcase. In saying that, I have had Serv4wd pop up everytime I offroad. They've replaced tcase, DTCM and t-case motor and it's still doing it. Tomorrow it goes in for them to check some ground and there is also a position sensor that could be the issue as well.
Where did you see that doing a 5 tire rotation is an issue though? I personally don't think it's that at all. It doesn't pop up after a tore rotation, only off road and a few isolated incidents onrpad where gas was applied and wheels were turned in 4wd.

There is a lot of history with Jeeps killing the 4auto “Quadra trac” transfer case when tires are at different wear. Simply because the sensors tell the control that the wheels are turning at different speeds enough to engage the 4WD pretty much off and on all the time, not just when actually needed.

And the issue is not after a rotation, it is after ~1000 miles of different tire size. The t-case has had it. Engaging and disengaging all the time.

 

[stumblinhorse]

Can you help me with why a tire rotation would cause any issues, especially a tire size issue?? All 5 are the same size. right? You are rotating 5 every 5K right??
Not at all familiar with this issue.

G.

Well, pretty much why I am asking who is doing what. I know that there has been countless issues on other Jeep 4auto platforms, grand Cherokee etc, of people losing their t-case when having differing amounts of wear on the tires. Didn’t know if people are doing 5 tire rotation at 3-5k miles without issue On JLs with the same t-case.

 

[Dyolfknip74]

There is a lot of history with Jeeps killing the 4auto “Quadra trac” transfer case when tires are at different wear. Simply because the sensors tell the control that the wheels are turning at different speeds enough to engage the 4WD pretty much off and on all the time, not just when actually needed.

And the issue is not after a rotation, it is after ~1000 miles of different tire size. The t-case has had it. Engaging and disengaging all the time.

Ok, that's not the issue in my case. It's been doing that since day one offroading it with 5 x exact same tires and wheels.

Can't say I've heard about your specific issue on here either. In saying that, who knows. Lol

 

[garyji]

Wow! Thanks for the update. That system needs some serious re-engineering if tire wear can cause those issues.

G.

 

[NOIDEAWIAM]

I always do the 5 tire rotation. I have never had any issues with warning lights or anything of the sort on my 392

 

[stumblinhorse]

Ok, that's not the issue in my case. It's been doing that since day one offroading it with 5 x exact same tires and wheels.

Can't say I've heard about your specific issue on here either. In saying that, who knows. Lol

I don’t have an issue. I am just aware of many issues on other Quadra trac platforms when a tire of the same size is used that is less worn than the other 3.

As you can understand this will cause an issue. Wheels moving at different speeds are what engages 4WD, transferring power up front basically. If the computer allows for 1% variation or only .1% variation matters to how responsive the system is to changing conditions. So if one tire gets rotated in and it is .5% less rotation per mile. Is that in spec to engage 4WD or not.

 

[multicam]

Wow! Thanks for the update. That system needs some serious re-engineering if tire wear can cause those issues.

G.

I don’t think it can. I can’t speak for other models (Grand Cherokee, Commander, Patriot, etc.) and technically I can’t speak for other trims (I don’t have the full time auto 4wd T-case) but I don’t think this is an issue with any Wranglers. A difference of 4000-6000 miles shouldn’t make or break the system. Three tires with 48,000 miles of tread wear and one brand new tire? Maybe.

 

[stumblinhorse]

I don’t think it can. I can’t speak for other models (Grand Cherokee, Commander, Patriot, etc.) and technically I can’t speak for other trims (I don’t have the full time auto 4wd T-case) but I don’t think this is an issue with any Wranglers. A difference of 4000-6000 miles shouldn’t make or break the system. Three tires with 48,000 miles of tread wear and one brand new tire? Maybe.

The 4auto mp3022 t case used in the 392 and other 4auto wranglers comes from the Grand Cherokee. And 4-6000 mile difference of wear has been killing those t-case for the last 10 years.

 

[Dyolfknip74]

I don’t have an issue. I am just aware of many issues on other Quadra trac platforms when a tire of the same size is used that is less worn than the other 3.

As you can understand this will cause an issue. Wheels moving at different speeds are what engages 4WD, transferring power up front basically. If the computer allows for 1% variation or only .1% variation matters to how responsive the system is to changing conditions. So if one tire gets rotated in and it is .5% less rotation per mile. Is that in spec to engage 4WD or not.

Ya, I don't think it's that sensitive. Notwithstanding sensitivity, we just aren't seeing the issues you're talking about about.

 

[commbubba19]

The 4auto mp3022 t case used in the 392 and other 4auto wranglers comes from the Grand Cherokee. And 4-6000 mile difference of wear has been killing those t-case for the last 10 years.

I understand what you're getting at.

Any AWD system can be susceptible to premature wear and failure if there is enough of a difference in tire height between the 4 tires it's driving. Most user manuals of an AWD vehicle explicitly call this out to not install a different tire size that will cause a height difference.

Now most don't consider tire wear as being enough of a reason but with A/T and M/T tires which have such deep tread and can wear enough that can cause a similar enough differentiation between rotations from a used tire with 10k miles on it vs a new.

Honestly, in a true 4wd vehicle like the standard rubicon i did 5 wheel rotations. However when I had my pickup, I didn't because the spare was a steel wheel. Even with the same height spare tire.

I'm just going to do a 4 tire rotation on the 392 and not worry about it and treat the spare as a spare.

Sponsored