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Old 03-01-2014, 08:31 AM   #1
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"95 Flat Tow Issues

When I try tow Flat Tow my "95, the tires straighten about 1/2 way through the turn. I have a 4.0,auto, 4" lift , locker ft and back, a high steer setup. Not sure what, if anything, I can do to correct this. Someone said to remove the shims in the ft. axle to change the caster but that would cause a viberation in the ft drive shaft. Anyone got any suggestions?

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Old 03-01-2014, 10:24 AM   #2
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my guess would be that the lockers might be causing it

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Old 03-01-2014, 02:07 PM   #3
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The front axle shouldn't have any shims on it at all.

Trans should be in gear with the t-case in neutral. Like Harley said...locker could be causing it. Are they lunch box lockers?
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Old 03-02-2014, 10:01 AM   #4
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Yes, they're lunch Box. The rear also has shims.
Think I'll try taking them out of the ft. and see if it changes anything. I like the locker in the ft. for wheeling, would use that more than I would need to tow.
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Old 03-02-2014, 12:30 PM   #5
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From what I understand it is the lockers that keep the wheels from rotating separately.

cb
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Old 03-02-2014, 12:54 PM   #6
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Yes, the rear springs should have shims to angle the pinion toward the t-case.

The front is a different animal, if you use shims, then you change the caster angle and that throws the steering geometry into a whole different world of mathematical equations. Its possible to get it to work with shims, but I would bet that it will wear tires in a heart beat. Plus an alignment shop will never be able to get it properly lined up with the caster angle being off.

Is this the reason that you are flat towing it? Because its a handful to drive out on the road at highway speed?
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Old 03-02-2014, 12:58 PM   #7
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are your shackles stock length...if not,that could be why someone shimmed the front
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Old 03-02-2014, 03:00 PM   #8
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Do you still have the CAD operational on the front axle? If it is, this is where your problem is. Once you shift the t-case lever out of 2wd, the vacuum signal is in the lines for the CAD to be engaged. So, even in neutral on the t-case, the CAD is still engaged, and locking both axles together, causing the steering problems when you are trying to flat tow.
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Old 03-02-2014, 09:34 PM   #9
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I had the alignment done about a year ago with no problems. The shackles were change with the lift. I want to tow behind my trailer or p/u for weekend trips. I think the CAD idea might be the problem but how can that be fixed?? Thanks for the come backs.
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Old 03-03-2014, 07:33 AM   #10
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Quote:
Originally Posted by 0III0forlife View Post
Do you still have the CAD operational on the front axle? If it is, this is where your problem is. Once you shift the t-case lever out of 2wd, the vacuum signal is in the lines for the CAD to be engaged. So, even in neutral on the t-case, the CAD is still engaged, and locking both axles together, causing the steering problems when you are trying to flat tow.
Only if he has the engine running while he is towing it. You can not have vacuum if the motor is not running.
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Old 03-03-2014, 08:12 AM   #11
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Only if he has the engine running while he is towing it. You can not have vacuum if the motor is not running.
I gave your response some more thought and you could be correct if the OP is shifting the TC into neutral with the engine running. It takes vacuum to engage the CAD but also vacuum to disengage the CAD. I bet the OP may be doing this, then shutting the motor off.

OP, is this how your are doing it?
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Old 03-03-2014, 08:37 PM   #12
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Yes, I believe I did have the engine running when shifting the Transfer case into N. So your saying shift with the engine off. That will keep the the ft. axle unlocked and out of 4wheel?? I'll try anything at this point.
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Old 03-03-2014, 09:39 PM   #13
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I think it would be most difficult to determine that the TC is in fact in neutral without running the engine to test it. I cannot feel a neutral in mine.
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Old 03-03-2014, 09:46 PM   #14
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What about just pulling off the vac lines from the cad then fire it up and put in neutral? That would ensure no vac on the CAD for a true test.
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Old 03-04-2014, 11:17 AM   #15
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I think it would be most difficult to determine that the TC is in fact in neutral without running the engine to test it. I cannot feel a neutral in mine.
Put tc in neutral, transmission in gear and if you can roll jeep then tc is in neutral.
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Old 03-05-2014, 09:56 PM   #16
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All great comebacks, gonna try out putting T-case in neutral with engine off. Tranny in park, steering wheel unlocked. I'll let you know if it works, but not til the weekend. Gotta work and going out on Sat. wheeling. I'll try it out when we get back. Thanks

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