4WD - Low issues - Fairly sure it's not the bracket issue. - Jeep Wrangler Forum

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Old 06-03-2013, 05:35 PM   #1
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4WD - Low issues - Fairly sure it's not the bracket issue.

First: 1.) Searched, I don't believe this to be a bracket issue, but just i case I'm going to remove it and shift it by hand next time I have an opportunity.
2.) No body lift, however I do have a 4.5" RE lift which the previous owner installed.

I'm able to get into 2WD hi, 4wd hi, N, 4wd L. At no time does it pop out of gear.

Everything works fine with the exception of 4WD low. Putting it into 4WD low, it seems to engage fine, I'm able to see "4wd" illuminate on the console, however once it's in gear and I give it gas the problem seems to occur. Giving it gas it doesn't move until you give a good amount of throttle in excess of 2500rpm. It feels as if you have to rev it to a certain point until it grabs.

I tried taking video, but unfortunately video doesn't illustrate the problem very clearly.

Any thoughts?


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Old 06-04-2013, 12:33 PM   #2
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Any thoughts/suggestions, reliable ways to test/verify 4WD low?

Also, it may not be clear but the "bracket issue" referenced, I'm referring to the transfer case linkage.

Appreciate any input.

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Old 06-04-2013, 01:26 PM   #3
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Crawl under your rig and shift the linkage by hand. Make sure that the shifter is fully locked into 4low
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Old 06-04-2013, 01:34 PM   #4
Knows a couple things...

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That sure sounds like the transfer case just isn't being fully engaged all the way into 4Lo. If that is the case, the linkage has just slipped out of adjustment so it can't pull the lever on the t-case far enough. That is easily remedied with nothing more than a 1/2" wrench. Loosen the bolt on the linkage (accessed from underneath the Jeep), pull the shift rod back more into the bracket the bolt is in, then tighten the snot out of the bolt. You may be able to see the original indentation on the rod the bolt was originally holding it at to give you a good spot to move the shift rod back to.
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Old 06-04-2013, 04:06 PM   #5
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Jerry, thank you for your response.

Took what you said and went out to take a second look at the jeep with someone that has a bit more experience than I do on this front. We found that while the jeep doesn't have a body lift it does have a TC Drop. I haven't touched the bracket yet.

With that said, another issue was spotted. When in 4WD-Hi I have no reverse, zero. It sounds like it tries to engage, but I got nothing. I have it in 2hi, 4low and oddly enough the problem that's presented itself doesn't occur in 4low when in reverse.

The bracket is something that will have to be addressed, I also want to do whatever is necessary to raise the TC back up to normal. It doesn't make sense to me to raise something and lower another component. With that, I'm wondering if the driveshaft angles being incorrect could be contributing to this in some way. This is a new world to me, thanks for offering your suggestions!
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Old 06-04-2013, 05:16 PM   #6
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Sometimes when a tc drop is installed an additional bracket is added to the oem tc shift bracket that's mounted to the inside of the tunnel to drop it so the linkage stays level. I've seen at least two instances where the end of the shift linkage rod hits the bolt heads and prevents it from fully engaging the tc. On one of them we had to counter sink the bracket holes and go to flathead machine screws to make it work. While you're adjusting the linkage, take a look above the skid from the back while someone shifts it through the gears and see if there are restrictions.
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Old 07-05-2013, 03:30 PM   #7
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Removed the TC Drop, fixed the 4wd high issue where there was no reverse.
Changed TC Fluid - Was low on fluid.

Still hasn't fixed the issue. Hunting down a competent shop to review the problem ATM.
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Old 08-27-2013, 01:46 PM   #8
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Realized I never provided an update here.

A few things.
1.) the bracket was a problem originally, fixed easily.
2.) Removed TC drop, added tom woods driveshaft. Made the vehicle soooo nice.
3.) With respect to the issue where it felt like the transmission or something was binding and then launching or there was a delay in acceleration, it wound up there was no problem. Taking the jeep off-road and shifting into first, everything was fine. The same went for second gear. What I did have was horrible shifting due to what I believe was the P.O.'s lack of maintenance. A BGFlush, driveline fluid changes and it's almost completely solved the issue.

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