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willysmjeeps.com :: View topic - Dana 18 swap
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Dana 18 swap

 
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BB
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Joined: Feb 14, 2014
Posts: 31
Location: Dunedin, Florida

PostPosted: Thu Mar 21, 2019 7:22 pm    Post subject: Dana 18 swap Reply with quote

My question is I have a good 1955 cj5 Dana 18 transfer case that was rebuilt just before I got it. Is it possible to use it in my 52 m38 if I change the main shaft gear on the transmission to match the transfer case? Also what is the difference in the gearing of the earlier 26 tooth and later 29 tooth designs advantage/disadvantages, improvements? Thanks Brian B.
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wesk
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Joined: Apr 04, 2005
Posts: 16225
Location: Wisconsin

PostPosted: Thu Mar 21, 2019 10:38 pm    Post subject: Reply with quote

The 18 is a very simple and effective unit when used with the light weight jeep and the small engines. The only real improvement over it's life span was the pre 1950 upgrade on shaft diameter of the intermediate shaft. There are aftermarket bearing upgrades available.

The ratios for the M38 thru early CJ3B 26 tooth gear WO PN A-10469 is Hi 1.00:1 and Lo 2.43:1.

The ratio for the late CJ3b and CJ5 29 tooth gear WO PN 809297 is Hi 1.00:1 and Lo 2.46:1.
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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
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Joined: Feb 14, 2014
Posts: 31
Location: Dunedin, Florida

PostPosted: Fri Mar 22, 2019 1:40 pm    Post subject: Reply with quote

Wes where can I find information on bearing upgrades and vendors.
Thanks again.
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OKCM38CDN
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Joined: Feb 17, 2012
Posts: 530
Location: Del City, OK

PostPosted: Fri Mar 22, 2019 3:18 pm    Post subject: Reply with quote

Your intermediate shaft and bearing size will depend on on the shaft in your case... the cases are machined / cast for the proper size shaft...

Once you find shaft size just order a rebuild kit for that size shaft.

I may be wrong but that is my understanding...
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Hal, KB1ZQ
TSGT, USAF (Ret)
1952 M-38 CDN CAR 52-31313
1952 M-100 Strick #104
1951 Willys Wagon (For Sale)
1954 Willys M38A1 201001205
Tornado Alley
Del City, OK
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4x4M38
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Joined: May 30, 2014
Posts: 3440
Location: Texas Hill Country

PostPosted: Sat Mar 23, 2019 8:11 am    Post subject: Reply with quote

Search for info here on D18 transfer case rebuild.

There are several good sources of info, including Moses Ludel, Novak’s and a self published tranny and transfer case rebuild document, that for the life of me I can’t remember his name. Wes will chime in I’m sure.

Do not settle for any bearings except for US manufacture. Mainly because of quality, but also because you don’t have to. Also, there are some shafts that are out there that aren’t hardened properly.

If you stick with Midwest Military, Army Jeep Parts, Pete DeBella and Brent Mullins you should be able to find what you want but make sure you request US manufacture parts. Shop, as some prices are lower than others. I split my orders up, found what I needed and saved some money. In some cases new, old stock parts are available, but you will usually pay more for them.
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1950 M38
MC11481
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4x4M38
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Location: Texas Hill Country

PostPosted: Sat Mar 23, 2019 8:14 am    Post subject: Reply with quote

Rick Stivers, of course...

http://willystech.com/wt/Model18TCase/Model18TransferCase.html
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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
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