No gears with 35"
JK Freak
Joined: Mar 2011
Posts: 791
Likes: 0
From: Vancouver, BC
Regearing will let you run at higher rpm. But so is running a lower transmission gear. You can get higher rpm either way. In the end it doesn't make a difference since you're running at same higher rpm.
JK Enthusiast
Joined: Sep 2012
Posts: 467
Likes: 1
From: Ohio
Originally Posted by TheTerminator
Regearing will let you run at higher rpm. But so is running a lower transmission gear. You can get higher rpm either way. In the end it doesn't make a difference since you're running at same higher rpm.
JK Super Freak
Joined: Feb 2011
Posts: 1,106
Likes: 1
From: Houston,TX
Maybe I am missing something but isn't the OP asking if running bigger tires with stock gearing DAMAGE the eingine/transmission, not will it feel like crap to drive.
One would assume that adding bigger tires and weight would put more stress on the drivetrain and engine to work that way it is supposed to so it could cause premature wear on the eingine. By regearing, you are putting the proper gearing for the transmissiona and eingine for the setup you have so the stress is reduced.
Others might argue that it won't make any differnece on the stress on the tranny/eingine. Compare a stock JK running 3.73 gears vs 4.10. Does one Jk expect to have a shorter lift span over the other??
At least, the above is what I gethered from the OP. We all agree that regearing changes how it feels when driving but Maybe I just missed the answers on whether or not the eingine and/or tranny is compromised by not regearing when mods are done.
I honestly don;t know the answer so hopefully someone will chime in with an explanantion.
One would assume that adding bigger tires and weight would put more stress on the drivetrain and engine to work that way it is supposed to so it could cause premature wear on the eingine. By regearing, you are putting the proper gearing for the transmissiona and eingine for the setup you have so the stress is reduced.
Others might argue that it won't make any differnece on the stress on the tranny/eingine. Compare a stock JK running 3.73 gears vs 4.10. Does one Jk expect to have a shorter lift span over the other??
At least, the above is what I gethered from the OP. We all agree that regearing changes how it feels when driving but Maybe I just missed the answers on whether or not the eingine and/or tranny is compromised by not regearing when mods are done.
I honestly don;t know the answer so hopefully someone will chime in with an explanantion.
JK Forum Regional Rep
Joined: Jul 2011
Posts: 810
Likes: 0
From: Norco, CA
I ran 35's with the stock gearing 3.73 with an auto trans on the 3.8 engine for a while on the trail and the road. After upgrading to 35s I occasionally would see the hot transmission oil warning when doing long uphill climbs (in 4-Lo & overdrive off). After installing a trans oil cooler I have not seen this warning. Your call if you view the warning as damage, I did.
JK Enthusiast
Joined: Jun 2011
Posts: 176
Likes: 0
From: Brazil
I had my 3.8 auto with stock 4.1 and 35s for some weeks. My trans got hot easily on the city! 4LO was doable... Highway was a dog...
Then, changed to 5.13...
Night and day, for me and for my jeep! Cooler trans, perdormance is back... Highway I can drive with no problem...
I think someone can do 35 and lower (number) gear, but I think nobody should do it...
For sure we get easy on the drivetrain with the right gear...
Then, changed to 5.13...
Night and day, for me and for my jeep! Cooler trans, perdormance is back... Highway I can drive with no problem...
I think someone can do 35 and lower (number) gear, but I think nobody should do it...
For sure we get easy on the drivetrain with the right gear...
JK Freak
Joined: Mar 2011
Posts: 791
Likes: 0
From: Vancouver, BC
I ran 35's with the stock gearing 3.73 with an auto trans on the 3.8 engine for a while on the trail and the road. After upgrading to 35s I occasionally would see the hot transmission oil warning when doing long uphill climbs (in 4-Lo & overdrive off). After installing a trans oil cooler I have not seen this warning. Your call if you view the warning as damage, I did.
JK Freak
Joined: Mar 2011
Posts: 791
Likes: 0
From: Vancouver, BC
Why is that?
Calibrating the speedo and the "OD" button takes care of that. Mine doesn't hunt at all. If you just leave it in "D", then yes, it could hunt depending on road conditions.
especially with your auto hunting gears.