jack bauer
Well-Known Member
Does 4Auto mean that there is always power to the front wheels or only under certain conditions?4Auto is default, I believe it's the same Rock-Trac FT case (MP3022 4:1) with 2 hi left off the selection.
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Does 4Auto mean that there is always power to the front wheels or only under certain conditions?4Auto is default, I believe it's the same Rock-Trac FT case (MP3022 4:1) with 2 hi left off the selection.
On the Rub FT RT in 4Auto, the FAD is connected all the time, and the T-Case is in 2Hi normally. When wheel slip happens, it shifts to 4hi (quickly) and back to 2hi when slip stops.Does 4Auto mean that there is always power to the front wheels or only under certain conditions?
Got it.On the Rub FT RT in 4Auto, the FAD is connected all the time, and the T-Case is in 2Hi normally. When wheel slip happens, it shifts to 4hi (quickly) and back to 2hi when slip stops.
Yes, I think so in most circumstances. However, I think it has more to do with the solid axles (slip on one side will get "transmitted" to the other side whereas in a vehicle with independent suspension that does not happen as much). In your usual snowy roads, an AWD vehicle seems more stable. The Jeep is better at getting unstuck.So would you say on road in say a snow storm an audi with awd would be far superior to a JL in 4 hi or 4 auto?
Would it have killed them to show that it is activated and shows slippage?The Full Time cases aren't AWD, they are Automatic 4wd Hi. No center differential.
Runs in 2wd until slippage is sensed, then shifts to normal 4hi.
I don't think that's how it works. If it shifted into normal 4Hi then the front and rear axle are effectively locked together and both axles would be spinning at the same speed. No slipping. The tcase wouldn't know when to shift out of 4 hi. There needs to be some kind of clutch in the tcase to allow the slip so the front axle and the rear axle can spin at different speeds or the driveline would bind up. Otherwise going through turns would bind the system and it wouldn't be able to shift itself out of 4hi.On the Rub FT RT in 4Auto, the FAD is connected all the time, and the T-Case is in 2Hi normally. When wheel slip happens, it shifts to 4hi (quickly) and back to 2hi when slip stops.
? You can shift into and out of 4 hi whenever you want, the clutch simply disengages.I don't think that's how it works. If it shifted into normal 4Hi then the front and rear axle are effectively locked together and both axles would be spinning at the same speed. No slipping. The tcase wouldn't know when to shift out of 4 hi. There needs to be some kind of clutch in the tcase to allow the slip so the front axle and the rear axle can spin at different speeds or the driveline would bind up. Otherwise going through turns would bind the system and it wouldn't be able to shift itself out of 4hi.
BTW I'm not trying to start an argument, I'm just thinking out loud. In truth I don't know exactly how the system works. I've heard they stiff have a FAD which just blows my mind. Not the way I would have done it, but I hear it works well.
As for durability they put it's behind the 392 and the 4xe (those electric motors with the 2.0T makes for a lot of torque) so... That should say something. Supposedly the 392 doesn't have a 2Hi option on the shifter. It only has 4Auto, 4Hi and 4Lo
Mike wondering worst case scenario say that does eventually need to be replaced or repaired what type of money are we talking ? I plan to keep mine long term.Wet clutch is just a CHEAPER way to replace the job of mechanical center differential(Torsen or lockable).
Yes it's smooth, I can cornering way faster and under way heavier throttle in heavy rain in my 392 and not sliding a bit. It's heavenly on road specially in rain and snow pavement. However it's durability and longevity is really unknow.......