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Issues with Warn OD |
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47cj2a 
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Joined: 04 Nov. 2005 Location: wheelin the great northwest Status: Offline Points: 102 |
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 Topic: Issues with Warn ODPosted: 06 Feb. 2023 at 9:39pm |
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I am having issues with my Warn OD unit. back story,
many years ago I got the Warn OD, t90, S18 and PTO rebuild by Herm and everything bolted together. Before all of this the Warn shifted no problems. well many years latter i finally got it all into a driving jeep and the only problem is that the OD unit will not shift out of over drive. I called herm and was told to put some miles on it and it should free up. the problem is that even though i have to take the body off the jeep for paint i havnt put enough miles on the thing to free it up. any thoughts suggestions? what could be the most likely cause of this? should I just pull the whole thing apart while the body is off
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'47 cj2a strewn about
'70 cj5 '98 tj a few things zip tied here and there '93 Land Rover Defender 110 200TDI '62 Scout 80 stock '66 Coronet 2 dr post 426 Hemi 4spd '68 M35 Multi fuel '68 M416 |
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TERRY
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Posted: 06 Feb. 2023 at 10:41pm |
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Linkage hung up?
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BOULDER 48 2A
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44bz
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Posted: 06 Feb. 2023 at 10:45pm |
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I don't have any suggestions, but I put an NOS Warn overdrive in my 2a and had no issues shifting in or out. I would think your issue means something is wrong and not just a break in thing as Herm suggested...
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46 CJ2a - Buick 225, T90/D18, Warn overdrive, Rancho 2.5" lift, confer shackles, power steering, disc brakes, RandP master cylinder kit, 33x10.50 BFG KM3s
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47cj2a
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Joined: 04 Nov. 2005 Location: wheelin the great northwest Status: Offline Points: 102 |
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Posted: 06 Feb. 2023 at 11:37pm |
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As far as I can tell the linkage is not binding.
I have never heard of having to drive the thing to brake it in. Just seeing of anyone has had a similar issue and if driving it solved it
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'47 cj2a strewn about
'70 cj5 '98 tj a few things zip tied here and there '93 Land Rover Defender 110 200TDI '62 Scout 80 stock '66 Coronet 2 dr post 426 Hemi 4spd '68 M35 Multi fuel '68 M416 |
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Oilleaker1
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Joined: 06 Sep. 2011 Location: Black Hills, SD Status: Offline Points: 4348 |
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Posted: 07 Feb. 2023 at 8:27am |
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Never heard that it won't shift out. Usually won't shift in. I would pull the OD off the rear of the T case and look carefully at the bowl gear. If the fluted snap ring came off, the bowl gear can unscrew and destroy all. Herm worked on my Warn , Not Saturn, bowl gear and had to remove the planetary gears to replace a broken washer. After getting it back I discovered the pins inside the planetary gears were no longer roll pinned at the front. When they shift rearwards, it blocks the snychro collar from shifting in. I called him and got a rude response. I had a machine shop mill new holes in the replacement pins and install the roll pins that keep them from shifting back. A Saturn bowl gear has spot welded pins and a large snap ring to prevent this.
A good friend of mine had his bowl gear unscrew until he hear a loud noise. He said it sounded like $1000.00.  Not shifting is your first sign it's time to get back in there. Also, the bowl gear acts like a centrifuge and spins metal and garbage outwards and packs the bowl gear outer recesses. None of that was cleaned out at Herms while apart. That crap can lock the needle bearing rollers and then destroy your overdrive. Good magnetic drain plugs in both the cases is recommended.
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Green Disease, Jeeps, Old Iron!
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SE Kansas 46 CJ-2A
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Posted: 07 Feb. 2023 at 9:13am |
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Sometimes I wonder about Herm. It took six months for Herm to straighten out my brothers OD unit and he called every week. He got a different story almost every time he called. That was IF Herm would answer his calls.
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46 CJ-2A #64462 "Ol' Red" (bought April 1969)(second owner)(12 V, 11" brakes, M-38 frame, MD Juan tub)
U.S. Coast Guard Chief Petty Officer(ret.) U.S. Army Vietnam veteran and damned proud of it. |
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47cj2a
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Posted: 07 Feb. 2023 at 9:49am |
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yeah the more I think about it i am better of safe and just pull it all apart and see what the deal is. I have to reseal some areas of the combo any way might as well get it over with.
its been hit and miss with him over the years with me. sometimes i cant say nothing but good things and some times I wonder why i even bother
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'47 cj2a strewn about
'70 cj5 '98 tj a few things zip tied here and there '93 Land Rover Defender 110 200TDI '62 Scout 80 stock '66 Coronet 2 dr post 426 Hemi 4spd '68 M35 Multi fuel '68 M416 |
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oldtime
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Posted: 07 Feb. 2023 at 9:57am |
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Needing to be “broken in” is nonsense .
I would look to see if the shift rail poppet ball, spring and detent is functioning correctly. Edited by oldtime - 07 Feb. 2023 at 10:01am |
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Currently building my final F-134 powered 3B .
T98-A Rock Crawler using exclusive factory parts and Approved Special Equipment from the Willys Motors era (1953-1963) Zero aftermarket parts |
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mbullism
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Posted: 07 Feb. 2023 at 12:56pm |
Pretty sure "broken" is the operative word there...
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1946 CJ2A #69750 - "Plowshare"
Bantam T3-C #8502 Bantam T3-C #9704 Bantam T3-C #15849 1969 Kaiser CJ5 (sold) If you have an L134, ESN on or about J71297, we should talk :) |
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oldtime
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Posted: 07 Feb. 2023 at 1:09pm |
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Pull the poppet ball and spring out to see if it then shifts outta high range.
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Currently building my final F-134 powered 3B .
T98-A Rock Crawler using exclusive factory parts and Approved Special Equipment from the Willys Motors era (1953-1963) Zero aftermarket parts |
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Oldpappy
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Posted: 07 Feb. 2023 at 2:33pm |
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What Ken suggests is worth a try, and it may be something simple like that.
Always check the simple stuff first, but I would not drive it again until I was sure what was wrong.
If, as already suggested, the snap ring wasn't seated and came out the lock nut will back off and then the hub nut will loosen until it causes major damage to the bowl gear and possibly the input gear. The hub loosening might put it into a bind or let it back out enough that the synchronizer hub can't disengage. |
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If you can't get there in a Jeep you don't need to be there
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Bruce W
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Posted: 07 Feb. 2023 at 2:43pm |
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Oilleaker1 said,”A good friend of mine had his bowl gear unscrew until he hear a loud noise. He said it sounded like $1000.00.”
I was there. He actually said it sounded like “THOUSAND!!”  BW
Edited by Bruce W - 07 Feb. 2023 at 2:47pm |
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It is NOT a Jeep Willys! It is a Willys jeep.
Happy Trails! Good-bye, Good Luck, and May the Good Lord Take a Likin' to You! We Have Miles to Jeep, Before We Sleep. |
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Fltfndr
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Posted: 07 Feb. 2023 at 3:21pm |
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This may sound like a stupid simple possible answer but I had my T/C rebuilt and when they reinstalled it along with the O/D it would not shift either. Turned out there is two adjustment holes in the linkage and if not properly assembled, O/D will not shift
Fltfndr
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Fltfndr
1948 CJ2A Restomod "Six Pac" The object of war is not to die for your country, but make the other bastard die for his. George S. Patton |
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3A Steve
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Posted: 07 Feb. 2023 at 3:29pm |
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Had one of Herm's ODs that locked up. Figured I'd take the T90 floor cover off and look for something binding. For some reason I checked the OD shaft after taking a couple of the bolts out of the cover and it freed up. Put bolts back in and one of them locked things up again. Put a shorter bolt in and it has worked fine for years (did need a minor repair by Herm for something else but not for locking up). Worth a try.
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Oldpappy
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Posted: 07 Feb. 2023 at 3:39pm |
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I like "stupid simple possible answers" because I have made a lot of stupid simple mistakes my own self.
If the bowl gets loose I bet it do make a loud noise. Edited by Oldpappy - 07 Feb. 2023 at 3:40pm |
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If you can't get there in a Jeep you don't need to be there
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47cj2a
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Posted: 07 Feb. 2023 at 8:53pm |
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thanks for the advice, all very good.
will look into the linkage and detent ball first. removing the back will be last resort as theres a PTO attached to it so not as easy. but it might be worth it to make sure everything is at it should considering it will be much harder once the body goes back for hopefully the last time.
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'47 cj2a strewn about
'70 cj5 '98 tj a few things zip tied here and there '93 Land Rover Defender 110 200TDI '62 Scout 80 stock '66 Coronet 2 dr post 426 Hemi 4spd '68 M35 Multi fuel '68 M416 |
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Bruce W
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Posted: 07 Feb. 2023 at 9:00pm |
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Maybe I’m thinking of something else, but,,,,
Isn’t the tension on the poppet ball spring adjustable? As in retained by a bolt or screw that can be set in the proper location and locked in place by a nut? If I’m not delirious, maybe that screw is too tight. BW
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It is NOT a Jeep Willys! It is a Willys jeep.
Happy Trails! Good-bye, Good Luck, and May the Good Lord Take a Likin' to You! We Have Miles to Jeep, Before We Sleep. |
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Oldpappy
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Posted: 07 Feb. 2023 at 10:28pm |
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You are not delirious, but are correct at least with the Warn unit, as pictured below, which shows the adjustment screw for the detent.
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If you can't get there in a Jeep you don't need to be there
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oldtime wrote: