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Unread 01-25-2014, 08:53 AM   #1
ZJNewbi3
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Weird question?

So, if I have a 249tc and go to a car wash that has the auto puller where you shift into neutral, should I be throwing the tc in neutral or the transmission?

I only go to these in the winter and don't want to destroy the VC in the 249 before I get everything for my case swap...

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Unread 01-25-2014, 09:48 AM   #2
zj97ltd
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I wouldn't worry too much about it. It's a short distance and a straight line, just put the tranny in neutral and enjoy the bubbles.
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Unread 01-25-2014, 12:31 PM   #3
Technohead
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Destroy the VC? Sounds like you have been reading bad information posted on JeepForum by people who have no clue what they are talking about.
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Unread 01-25-2014, 04:21 PM   #4
ZJNewbi3
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Originally Posted by Technohead View Post
Destroy the VC? Sounds like you have been reading bad information posted on JeepForum by people who have no clue what they are talking about.
Well, I read a lot about only using flat tow for your ZJ (if it breaks down or if your hauling it) or else you could ruin the 249? Since the car wash uses that tuging mechanism I thought it was almost the same as towing (not flat), but maybe not?
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Unread 01-25-2014, 04:29 PM   #5
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If your Jeep or any 4x4 breaks down, you should be using a flat deck or dollies. Most peoples knowledge extends to the point of bashing the case, but not knowing why they are doing it. All they hear is OMG no 2wd and I want good mileage.

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Unread 01-25-2014, 04:39 PM   #6
ZJNewbi3
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Quote:
Originally Posted by WhiteOut View Post
If your Jeep or any 4x4 breaks down, you should be using a flat deck or dollies. Most peoples knowledge extends to the point of bashing the case, but not knowing why they are doing it. All they hear is OMG no 2wd and I want good mileage.

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I would like to know how not flat towing the jeep would ruin the case? I am aware however that the 2wd in the 242 only MINOR-LY improves mileage over the 249 AWD. I dont care about the mileage, I just want full 50/50 split in the 242s 4wd part time. Summer: 2wd, winter: 4full, stuck: 4part or 4lo.

What I read so far, my 249 doesnt offer the 50/50 power split unless (and correct me if I'm wrong) the system senses a slip and engages 50/50. Otherwise, the power is split 20 front / 80 rear. Is this correct? (Trying to learn here so be nice )

Quote:
Originally Posted by zj97ltd View Post
I wouldn't worry too much about it. It's a short distance and a straight line, just put the tranny in neutral and enjoy the bubbles.
Thanks for taking my worry away!
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Unread 01-25-2014, 04:46 PM   #7
WhiteOut
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Yeah, power is split until it slips, then is gets distributed. The big advantage the 249 has in a bigger chain and it locks the front and back axles together in 4lo. The lock function is only on the 96-98 models though

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Unread 01-25-2014, 05:10 PM   #8
ZJNewbi3
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Yeah, power is split until it slips, then is gets distributed. The big advantage the 249 has in a bigger chain and it locks the front and back axles together in 4lo. The lock function is only on the 96-98 models though

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By "lock" you mean 50/50 correct? I own a 95...maybe instead of 242 swap I can rebuild and throw in a 96-98 249? Would be stronger and an easier swap but probably not cost effective.
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Unread 01-25-2014, 05:10 PM   #9
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Quote:
Originally Posted by ZJNewbi3 View Post
I dont care about the mileage, I just want full 50/50 split in the 242s 4wd part time. Summer: 2wd, winter: 4full, stuck: 4part or 4lo.

What I read so far, my 249 doesnt offer the 50/50 power split unless (and correct me if I'm wrong) the system senses a slip and engages 50/50.
Its true that from 93-95 the 249 does not lock the front and rear in part time 4LO. This ranks as one of the most bone headed decisions in the history of Jeep.

The 242 does have the full lock in both part time modes but full time behaves like an open diff and is nowhere as effective as full time in the 249.

Both the 242 and 249 hang too low.

What you really need is a 231. Simpler, more clearance, more aftermarket, higher torque capacity (than the 242)
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Unread 01-25-2014, 06:06 PM   #10
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Quote:
Originally Posted by Technohead View Post
Its true that from 93-95 the 249 does not lock the front and rear in part time 4LO. This ranks as one of the most bone headed decisions in the history of Jeep.

The 242 does have the full lock in both part time modes but full time behaves like an open diff and is nowhere as effective as full time in the 249.

Both the 242 and 249 hang too low.

What you really need is a 231. Simpler, more clearance, more aftermarket, higher torque capacity (than the 242)
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Unread 01-25-2014, 06:07 PM   #11
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There is no worry about the transfer case in the car wash because all four tires are still on the ground. The worry comes from when you try to move the vehicle with only one axle's tires touching the ground and the other being held still (as in on a sling lift tow truck).

Hence why a 249 ZJ must always be either flat towed (with the transfer case in neutral and the transmission in park) or on a flatbed with all four tires off the ground. So long as all four tires are allowed to rotate freely or all four tires are held motionless, the transfer case is fine.
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Unread 01-25-2014, 06:17 PM   #12
ZJNewbi3
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Quote:
Originally Posted by Technohead View Post
Its true that from 93-95 the 249 does not lock the front and rear in part time 4LO. This ranks as one of the most bone headed decisions in the history of Jeep.

The 242 does have the full lock in both part time modes but full time behaves like an open diff and is nowhere as effective as full time in the 249.

Both the 242 and 249 hang too low.

What you really need is a 231. Simpler, more clearance, more aftermarket, higher torque capacity (than the 242)
Don't really care too much about the clearance cause the wheeling I do isn't too extreme. The 231 has 2wd, 4hi, n, 4lo correct? Does it lock 50/50 in 4hi? And isn't the 249 the strongest out of the three? Is the 231 less of a headache to swap? (No drive shaft or shifter linkage issues) I do know the input gear has to be changed (thanks to the awesome swap right up!)
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