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Towing MJ with a dolly..


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231 Transfer cases before 1995 did not have a true neutral. In the neutral setting the front and rear drive shafts are connected. Do this on a dolly = VERY VERY BAD. At a minimum you would grenade the transfer case.

 

Leave the transmission and transfer case in whatever setting you prefer. Pulling the rear drive shaft is the best and easiest way to dolly it.

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The U-joint is held to the yoke with two straps that are each held on with two bolts that have a 8mm head. You need an 8 mm wrench to remove the rear shaft.

 

You'll either need to simply tie up the shaft under the bed, or slide the shaft out of the transfercase, and lose all your fluid, or somehow seal the end of the case so you don't lose any fluid.

 

Also make sure you wrap the U-joint with electrical tape so the two now free caps don't fall off.

 

This is a front axle, but it works the same. You can see where the 4 bolts are, remove them, take off the straps, and you'll probably have to shove a prybar between the U-joint and the pinion nut to pop it out of the yoke. Be careful not to pop the caps off.

 

ds-2.jpg

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231 Transfer cases before 1995 did not have a true neutral. In the neutral setting the front and rear drive shafts are connected.

Guess I'll never win this battle... :headpop:

 

Sorry Marcel but this is not true. It's been proven time and time again...

Sorry, but it IS true.

 

The Neutral position of the transfer case on the early 231 cases disconnects the transfer case from the transmission but it locks the front and rear driveshafts together. After you made this claim the last time I went out and jacked up my '88 XJ, which I bought new and which I know is all original. I verified that the driveshafts were locked together and I posted it then.

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Which side of the driveshaft do I disconnect? The one at differential or at transfercase and if at differential, would it still spin even though tied up.. Just thought I guess not since nothing to turn it because front are off the ground and not connected to no matter what

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231 Transfer cases before 1995 did not have a true neutral. In the neutral setting the front and rear drive shafts are connected.

Guess I'll never win this battle... :headpop:

 

Sorry Marcel but this is not true. It's been proven time and time again...

 

I have proof sitting in my driveway. Neither my 87 Comanche nor my 94 Cherokee have a true neutral. Come over for a visit and I'll show you.

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231 Transfer cases before 1995 did not have a true neutral. In the neutral setting the front and rear drive shafts are connected.

Guess I'll never win this battle... :headpop:

 

Sorry Marcel but this is not true. It's been proven time and time again...

 

 

I have proven to myself that mvusse is correct and you are not.

 

My findings are that the only np231's that agree with you are sealed output np231's. If it has a tail shaft that seals on the driveshaft, it does NOT have a true neutral. It will lock front to rear. Period.

 

All jeep tech from jeep says this, too. All owner's manuals say it. Lead__not_follow, you are wrong. Period

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I checked the 93 231 in the 2.5 MJ today. It does have a true neutral. I also checked the 90 242 in the shed. It does have a true neutral. Twoish years ago, when I tested an 88 231, it did not have a true neutral.

 

Perhaps the T-cases paired with CAD axles aren't true? There's a 91 231 in my 4.0 MJ that came from a 91 XJ, however that XJ did have a CAD axle, and the T-case is equipped with the vacuum switch. I'll check that one, and the 88 XJ's 231s tomorrow.

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i towed mine the other day with the trans and transfer both in neutral. the front driveshaft still was spinning.

 

Forgot about the front axle disconnect saving you. The step by step procedures in my 87 manual will put the transfer case in neutral with the front axle disengaged. I have run a CAD delete for so long I completely forgot about it.

 

I checked the 93 231 in the 2.5 MJ today. It does have a true neutral. I also checked the 90 242 in the shed. It does have a true neutral. Twoish years ago, when I tested an 88 231, it did not have a true neutral.

 

Perhaps the T-cases paired with CAD axles aren't true? There's a 91 231 in my 4.0 MJ that came from a 91 XJ, however that XJ did have a CAD axle, and the T-case is equipped with the vacuum switch. I'll check that one, and the 88 XJ's 231s tomorrow.

 

My 94 does not have a CAD axle, and also does not have a true neutral. Don't know about 242 cases as I never had one (yet). But AFAIK they were never available in an MJ.

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  • 2 months later...

I towed a 88 MJ over a 120 miles on a tow dolly with both the transmission and transfer case in neutral. Didn't seem to hurt anything. I would have preferred to drop the drive shaft but circumstances made that a non viable option. I think the CAD made it possible.

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