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Old 03-31-2012, 04:18 PM   #1
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4Lo Linkage

Alright, so this is something I've been meaning to address for a while but haven't gotten around to. The previous owner said that when he was rebuilding the transmission he didn't reconnect the 4Lo linkage. 2Hi and 4Hi work fine, and 4Lo acts like neutral. The question is, what's the process for getting in there and reconnecting it? I don't have a lot of experience with transmissions, so any help would be great. Thanks in advance!

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2.5" on the suspension, 1" on the shackles, 2" on the body, 4.88 Superior Gears, 35" Goodyear MT/R with Kevlar, MSD-6 Offroad ignition box, Flowmaster Exhaust, Warn 9.5Ti Winch, Detroit Tru-Trac Front, Detroit Locker Back

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Old 04-01-2012, 11:07 AM   #2
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the 4lo linkage is the same lever as the 4hi linkage connected to the transfer case

the body lift you have may be preventing the lever from going all the way into 4lo
or he screwed up something inside the transfer case

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Old 04-01-2012, 11:14 AM   #3
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There is also the possibility that the linkage just slipped out of adjustment. There is a lock bolt holding the linkage in the proper place on the actual Tcase shift lever. If this gets bumped out of it's correct spot, it won't go into 4Lo.

Remove your shift boots & cover plate from the trans tunnel inside the jeep & see if the linkage is loose or hitting anything.
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Old 04-02-2012, 12:59 AM   #4
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Alright, so with the boot/cover off it now does shift into 4Lo, but makes some awful grinding/popping noises while moving. This was done on deep gravel, so it's not a front/rear binding issue. Any ideas?
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2.5" on the suspension, 1" on the shackles, 2" on the body, 4.88 Superior Gears, 35" Goodyear MT/R with Kevlar, MSD-6 Offroad ignition box, Flowmaster Exhaust, Warn 9.5Ti Winch, Detroit Tru-Trac Front, Detroit Locker Back

"She may not look like much, but she's got it where it counts, kid. I've made a lot of special modifications myself." -Han Solo
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Old 04-02-2012, 07:33 AM   #5
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Make sure the lever on the Tcase is going full-travel into it's proper position. You can tell when you hear a solid 'clunk' from the case. Sounds like 4Lo is not fully engaging.
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Old 04-02-2012, 11:35 AM   #6
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I think that might be it. This is as far as it'll go by itself and stay:




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And if I hold it farther down it just grinds. Can I just grind out a bigger shift throw with a dremel or is there something else I should be doing?

EDIT: sorry for the sideways picture, here's a better one
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2.5" on the suspension, 1" on the shackles, 2" on the body, 4.88 Superior Gears, 35" Goodyear MT/R with Kevlar, MSD-6 Offroad ignition box, Flowmaster Exhaust, Warn 9.5Ti Winch, Detroit Tru-Trac Front, Detroit Locker Back

"She may not look like much, but she's got it where it counts, kid. I've made a lot of special modifications myself." -Han Solo
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Old 04-02-2012, 11:41 AM   #7
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At the bottom of the shaft there is a bolt that captures a rod going thru a square chunk of metal. By loosening that bolt you can make adjustment on the 'throw' of how much/direction the actual lever on the Tcase moves.

If that doesn't do it, then yes, you may need to clearance the transmission tunnel enough for the shifter to clear. Not uncommon w/ a 2" body lift.
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Old 04-02-2012, 01:14 PM   #8
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Do you mean this one?


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2.5" on the suspension, 1" on the shackles, 2" on the body, 4.88 Superior Gears, 35" Goodyear MT/R with Kevlar, MSD-6 Offroad ignition box, Flowmaster Exhaust, Warn 9.5Ti Winch, Detroit Tru-Trac Front, Detroit Locker Back

"She may not look like much, but she's got it where it counts, kid. I've made a lot of special modifications myself." -Han Solo
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