Blood Type J+
Well-Known Member
- Joined
- Feb 8, 2018
- Threads
- 2
- Messages
- 136
- Reaction score
- 195
- Location
- Austin, TX
- Vehicle(s)
- 99 TJ Sport 6-cyl
Interesting. The manual for my 99 TJ read as follows (bolding my own):
This transfer case is intended to be driven in the two wheel drive (2H) position for normal street and highway conditions such as dry hard surfaced roads.
In the events when additional traction is required, the transfer case 4H and 4L positions can be used to lock the front and rear driveshafts together and force the front and rear wheels to rotate at the same speed. This is accomplished by simply moving the shift lever to these positions. The 4H and 4L positions are intended for loose, slippery road surfaces only. Driving in the 4H and 4L positions on dry hard surfaced roads may cause increased tire wear and damage to the driveline components.
I took that to mean if it's not dry pavement, 4H is all good. I put on 100k miles with no problems putting it in 4H anytime the pavement was wet. As soon as I was pulling into a driveway or parking lot, I'd drop back to 2H to avoid binding and wide turning radii, though.
The JL manual:
The 4H and 4L positions are intended for loose, slippery road surfaces only and not intended for normal driving. Driving in the 4H and 4L positions on hard-surfaced roads will cause increased tire wear and damage to the drive-line components.
So no, routine driving in the rain, on pavement, in 4H is not a good idea now apparently.
This transfer case is intended to be driven in the two wheel drive (2H) position for normal street and highway conditions such as dry hard surfaced roads.
In the events when additional traction is required, the transfer case 4H and 4L positions can be used to lock the front and rear driveshafts together and force the front and rear wheels to rotate at the same speed. This is accomplished by simply moving the shift lever to these positions. The 4H and 4L positions are intended for loose, slippery road surfaces only. Driving in the 4H and 4L positions on dry hard surfaced roads may cause increased tire wear and damage to the driveline components.
I took that to mean if it's not dry pavement, 4H is all good. I put on 100k miles with no problems putting it in 4H anytime the pavement was wet. As soon as I was pulling into a driveway or parking lot, I'd drop back to 2H to avoid binding and wide turning radii, though.
The JL manual:
The 4H and 4L positions are intended for loose, slippery road surfaces only and not intended for normal driving. Driving in the 4H and 4L positions on hard-surfaced roads will cause increased tire wear and damage to the drive-line components.
So no, routine driving in the rain, on pavement, in 4H is not a good idea now apparently.
Sponsored