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General Forums => The Mess Hall => Topic started by: FourbangerYJ on May 28, 2010, 03:00:20 PM

Title: Flat towing with a auto
Post by: FourbangerYJ on May 28, 2010, 03:00:20 PM
My neighbor has a TJ with a auto. He is wanting to flat tow. I have never done it so I told him I would ask what to do with gear selection.

Tranny = N
T-case = N

is that how it should be?
Title: Re: Flat towing with a auto
Post by: Bounty Hunter on May 29, 2010, 06:36:29 AM
NO.  Tranny in Park and transfer case in neutral.  Check the owner's manual, it will state the same thing.

If you put the tranny in neutral, it's possible that the viscous properties of the transfer case fluid will spin the transmission and burn it up since the internals are spinning without the pump pushing fluid throughout the tranny.
Title: Re: Flat towing with a auto
Post by: oldjeep on May 29, 2010, 07:32:07 AM
And if you have any lockers, disconnect the rear driveshaft and put the tcase in 2wd.  Most NP231's lock the front and rear output shafts together in Neutral which makes the flat towed vehicle not steer as well if there are lockers in it.

Regardless of the lockers, rear driveshaft removed and tcase in 2wd keeps the fewest parts spinning and makes tcase issues less likely.
Title: Re: Flat towing with a auto
Post by: Torch_Ind on May 29, 2010, 08:10:47 AM
And if you have any lockers, disconnect the rear driveshaft and put the tcase in 2wd.  Most NP231's lock the front and rear output shafts together in Neutral which makes the flat towed vehicle not steer as well if there are lockers in it.

Regardless of the lockers, rear driveshaft removed and tcase in 2wd keeps the fewest parts spinning and makes tcase issues less likely.

with the rear shaft out and front shaft in would it no leak fluid out the rear of the t-case? 

Just asking I have never towed most I did was loose a rear shaft and had to pop bottle it to drive home in front wheel peal lol
Title: Re: Flat towing with a auto
Post by: sharpxmen on May 29, 2010, 08:50:19 AM
with the rear shaft out and front shaft in would it no leak fluid out the rear of the t-case? 

Just asking I have never towed most I did was loose a rear shaft and had to pop bottle it to drive home in front wheel peal lol

unless he's got an SYE or some newer t-case (they got smarter in time and the seal is no longer on the slip yoke).
Title: Re: Flat towing with a auto
Post by: oldjeep on May 29, 2010, 08:58:00 AM
with the rear shaft out and front shaft in would it no leak fluid out the rear of the t-case? 

Just asking I have never towed most I did was loose a rear shaft and had to pop bottle it to drive home in front wheel peal lol

You just disconnect it at the rear axle and wire/bungy cord it up out of the way.  Even with my SYE I've got no reason to fully remove the driveshaft (I use a tow dolly)
Title: Re: Flat towing with a auto
Post by: jagular7 on May 29, 2010, 09:28:35 AM
The output of the TJ tcase is not sealed with the rear ds yoke like earlier Wranglers. You can totally remove both front and rear ds and not have any issues. You can remove either front and rear ds from the pinion yoke and hang them up off the frame and not have an issue.
Title: Re: Flat towing with a auto
Post by: FourbangerYJ on May 29, 2010, 11:52:55 AM
NO.  Tranny in Park and transfer case in neutral.  Check the owner's manual, it will state the same thing.

If you put the tranny in neutral, it's possible that the viscous properties of the transfer case fluid will spin the transmission and burn it up since the internals are spinning without the pump pushing fluid throughout the tranny.

 :thumb: Thanks.
Drivetrain is all stock.