Warner T90 Transmission M38 gear shift housing removal

horse

According to the TM this is the gear box fitted to my M38.

I have seen a few videos on removing the gear shift control housing, looks straight forward on the M38 with the large removable floor panel.

I would like to look inside as you can see all the gears etc just out of interest.

My question is when you take the housing off the two fork selectors come off at the same time as one unit. I have not seen any information about refitting, does it just drop back in or does it have spring loaded parts which make it difficult. Also do you take the the housing off in a particular gear or neutral?

Thanks
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1952 M38

wesk · Posted: Sat May 30, 2020 10:41 am Post subject:

I did a little re-reading and seems you are correct. The two primary manuals for the task of dissassembly of the tranny do not offer much guidance on the top control cover assembly removal and installation. Making matters worse are the TM 9-1804B Running gear was re-written in June 1952 but the section on top cover removal and installation still refers/defers to the older TM 9-804 M38 early operator's manual. And of course the later TM 9-8012 M38 Operator's manual written Jan 1956 does not complement TM 9-1804B either. It's a wee bit better in the civilian factory manual for the CJ2A/CJ3A SM-1002 in chapter K Tranny-Transfer.

You can find most of this manual in my photo albums:

http://www.willysmjeeps.com/v2/modules.php?set_albumName=album71&op=modload&name=gallery&file=index&include=view_album.php

Specifically here:

http://www.willysmjeeps.com/v2/modules.php?set_albumName=album706&op=modload&name=gallery&file=index&include=view_album.php

Back to your question: The best way is to put tranny in neutral and remove the top cover with shift lever and forks undisturbed. Mark all relative positions or take photos of the cover assembly and the tranny internals in their undisturbed locations so you can easily rejoin them later.
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Wes K
45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100

Mjeeps photo album: http://www.willysmjeeps.com/v2/modules.php?set_albumName=Wes-Knettle&op=modload&name=gallery&file=index&include=view_album.php

horse · Posted: Sat May 30, 2020 3:34 pm Post subject:

Thanks Wes I will have a look, it will be one of those jobs done once will be happy to do it again but the first time a bit worrying should something pop out.
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1952 M38

MarkR1951M38 · Posted: Mon Jun 01, 2020 6:45 am Post subject:

Wes is correct, put the transmission in neutral, and remove the cover. The forks will come out as part of the cover assembly.
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1951 M38 MC 22731
(Converted 12v, Carter WO carb, single action fuel pump, electric wipers)

http://www.willysmjeeps.com/v2/modules.php?set_albumName=album527&op=modload&name=gallery&file=index&include=view_album.php

4x4M38 · Posted: Mon Jun 01, 2020 7:22 am Post subject:

I hope you find much better things than I did....
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Brian
1950 M38
MC11481
http://www.willysmjeeps.com/v2/modules.php?set_albumName=album372&op=modload&name=gallery&file=index&include=view_album.php

dpcd67 · Member Joined: Nov 25, 2016 Posts: 187 Location: Iowa

Just pop the cover off; you will see where the forks were; hard to screw it up. Now, as for what you see inside, sometimes it is like lifting rocks and finding snakes; if you don't want to see any snakes, don't lift the rock.
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M38 23100 June 51
M38 34523 Sep 51
M606/CJ3B 1964 Kaiser 57348 118458
M37B1 1963
Willys MB 1944
Ford GPW 1942
Dodge WC63 1943
Dodge Power Wagon WM300 1967
Plymouth Barracuda, 1973, 340 4 barrel
All ground up restored by me.
Lots of others.

horse · Posted: Tue Jun 02, 2020 3:44 pm Post subject:

Thanks for the input, oil on order, fingers crossed.
_________________
1952 M38

4x4M38 · Posted: Tue Jun 02, 2020 3:44 pm Post subject:

I had more than snakes....

🤣
_________________
Brian
1950 M38
MC11481
http://www.willysmjeeps.com/v2/modules.php?set_albumName=album372&op=modload&name=gallery&file=index&include=view_album.php

horse · Posted: Sat Jun 06, 2020 2:41 am Post subject:

Oil has arrived. I have removed the cover plate around the housing and there is a slight overlap of the metal work from the larger floor plate on the drivers side.

Do you have to remove the larger floor plate or will the housing angle out of the smaller access panel okay?
_________________
1952 M38

horse · Posted: Sat Jun 06, 2020 6:08 am Post subject:

All sorted. Undid the large cover but not removed. It slid across just enough to give full clearance all around.
_________________
1952 M38


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