Speedo Cable Length

RICKG · Member Joined: Aug 31, 2010 Posts: 1740 Location: SO IDAHO

ABOVE: Speedo end.
BELOW: Bottom end.

The upper casing is a takeout from my M38, the metal tag is #738J387 and is 58-1/4" long.
The lower casing was a NOS cable from MWM, the metal tag is #7320561 and is 63-1/4" long.
Both casings are branded Stewart Warner.

There is clearly a 5" difference between the 2 casings. I understand that there was a change at vehicle SN 44029 according to ORD9 2208.1
but the nature of that change is not specd. Could one be M38A1, and one
be M38?? I was not aware there were 2 different lengths.
_________________
keep 'em rollin'
RICKG MC 51986 DOD 01-52, '50 CJ3a

WillysMotors · Contributor Joined: Jan 19, 2006 Posts: 111

The 7320561 is actually a tachometer cable from an M35A2 according to the MWM website.

wesk · Posted: Sat Mar 21, 2015 8:19 am Post subject:

Keith may know the answer to this. The actual cables installed by Willys (early vs late) differed in length by only about 2 1/2".

The Willys speedo cables were:

Thru MC44029:
Inner shaft/core: AC# 1580786, WO# 118117, ORD# 7527483
Outer casing: AC# 1581439, WO# 118116
Entire assy: AC# 1581433, SW# 446125-55, WO# 801093, ORD# 7527480 These were 54.5" overall length.

After MC44029:
Inner shaft/core: AC# 1581351, SW# 41809-57-1-2 WO# 119212, ORD# 7355830
Outer casing: AC# 1581449, SW# 418041 WO# 805130
Entire assy: AC# 1581436, SW# 446125-57-1-2, WO# 805129, ORD# 7389881 These were 56.75" overall length.

With a couple of minor PN changes these last set of parts fit the M38A1/M170
_________________
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

RICKG · Member Joined: Aug 31, 2010 Posts: 1740 Location: SO IDAHO

The takeout casing I dimensioned at 58.25" is overall including fittings.
The 56.75" dimension provided by Wes is illustrated on the same casing below.

_________________
keep 'em rollin'
RICKG MC 51986 DOD 01-52, '50 CJ3a

RICKG · Member Joined: Aug 31, 2010 Posts: 1740 Location: SO IDAHO

WillysMotors · Contributor Joined: Jan 19, 2006 Posts: 111

Yes. I wouldn't hesitate to use it.

wesk · Posted: Sun Mar 22, 2015 10:43 am Post subject:

Keith,
Any idea why the increase in length at MC44029? This was the same serial the driven speedo gear increased in length.
_________________
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

WillysMotors · Contributor Joined: Jan 19, 2006 Posts: 111

Wes,

I'll have to send you the documents and have you decipher them. It looks to me that they added 2 more vendors and it may have been an existing part at another vendor for another application just longer.

wesk · Posted: Sun Mar 22, 2015 9:00 pm Post subject:

OK
_________________
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

WillysMotors · Contributor Joined: Jan 19, 2006 Posts: 111

The BOM for MC doesn't show a change in TC assy, so both use 800174 as a TC assy.

I will research 800174 and see if anything changed...

wesk · Posted: Mon Mar 23, 2015 8:14 pm Post subject:

There was no change to the transfer case. The change was to the longer speedo driven gear and driven gear external sleeve.

_________________
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

4x4M38 · Posted: Tue Mar 24, 2015 8:07 am Post subject:

As if things weren't confusing enough.

Just to be clear. We are talking about the entire cable assembly including the core, correct?

Otherwise the longer or shorter outer would be problematic with a shorter inner cable.
_________________
Brian
1950 M38
MC11481
http://www.willysmjeeps.com/v2/modules.php?set_albumName=album372&op=modload&name=gallery&file=index&include=view_album.php

wesk · Posted: Tue Mar 24, 2015 8:40 am Post subject:

The parts manual makes it clear which core (inner shaft) is used with which outer casing. Common sense dictates keeping them matched. The short core in the long outer casing results in no engagement in the speedo and/or driven gear by the core. Using the long core in the short outer casing results in not being able to full thread the casing on the speedo or driven gear sheath. Which will also jam the core and it will break when you try to drive it.
_________________
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

RICKG · Member Joined: Aug 31, 2010 Posts: 1740 Location: SO IDAHO

RICKG · Member Joined: Aug 31, 2010 Posts: 1740 Location: SO IDAHO


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