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4x4M38 Member
Joined: May 30, 2014 Posts: 3447 Location: Texas Hill Country
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oilleaker1 Member
Joined: May 14, 2009 Posts: 971 Location: South Dakota
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Posted: Thu Sep 28, 2017 5:37 am Post subject: |
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The A1 column is a bit longer and would provide more dunlap disease clearance! I do not know if the frame bolt pattern is the same. Other than that, I would think it would work. John |
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Xamon Member
Joined: Sep 18, 2012 Posts: 589 Location: South East Saskatchewan
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4x4M38 Member
Joined: May 30, 2014 Posts: 3447 Location: Texas Hill Country
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Posted: Thu Sep 28, 2017 6:19 am Post subject: |
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Thanks Guys.
I have an opportunity to buy an A1 takeoff assembly for 25 bucks.
My M38 box has to be trashed. I have not pulled it or disassembled
yet but I've got 1/2" vertical deflection of the sector shaft when I push and pull it at the drag link.
It sounds like not only the bearings and sector shaft are toast, but the case side as well. The horn button has been gone for a very long time, and I suspect there is nothing left in the case but rust. It makes a $&% of a sound when you turn the wheel.
I need to go look at it. One fuzzy photo showed the cover side an it looks like there is damage to the preload screw/nut area.
Thanks again. _________________ 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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wesk Site Administrator
Joined: Apr 04, 2005 Posts: 16251 Location: Wisconsin
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4x4M38 Member
Joined: May 30, 2014 Posts: 3447 Location: Texas Hill Country
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Posted: Thu Sep 28, 2017 10:03 am Post subject: |
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Thanks Wes.
The box is the last thing I need to rebuild in the steering assembly before I look at the knuckles, though I did give them the side to side and up and down wheel shake test, and had no looseness.
That was after I rebuilt the drag link, bell crank, replaced both tie rods and installed new ends all around. Prior to that I could turn the wheel 180 degrees and nothing happened up front......
With the amount of grease or oilly crud I found in the right front drum, I'm hoping to find that the excess lube kept the knuckle assemblies from suffering the same fate as some of their related parts.....
One can only hope. _________________ 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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4x4M38 Member
Joined: May 30, 2014 Posts: 3447 Location: Texas Hill Country
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oilleaker1 Member
Joined: May 14, 2009 Posts: 971 Location: South Dakota
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Posted: Fri Oct 06, 2017 3:00 pm Post subject: |
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Expect the worse. The rollers have a bad habit of gouging recesses in the race and rust right there because the don't move much at all like a wheel bearing does. That's my experience. |
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4x4M38 Member
Joined: May 30, 2014 Posts: 3447 Location: Texas Hill Country
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Posted: Fri Oct 06, 2017 4:16 pm Post subject: |
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Hi John,
I'm sure no matter what shape the A1 I found is mine is in much
worse shape. I'm sure that water has been into the tube as the button
has been gone for a long time. It makes a terrible sound when the
wheel is turned from side to side and I have about 1/2" vertical
deflection of the sector shaft. Without tearing it down I'm not sure
the shaft bearings have gone to the point of the housing being damaged.
I'm going to grab the A1 and take a look, and see where that takes me.
Thanks! _________________ 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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wesk Site Administrator
Joined: Apr 04, 2005 Posts: 16251 Location: Wisconsin
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4x4M38 Member
Joined: May 30, 2014 Posts: 3447 Location: Texas Hill Country
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wesk Site Administrator
Joined: Apr 04, 2005 Posts: 16251 Location: Wisconsin
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4x4M38 Member
Joined: May 30, 2014 Posts: 3447 Location: Texas Hill Country
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Posted: Wed Nov 01, 2017 9:31 am Post subject: steering box ratios |
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I've been reading through older posts on steering boxes and horn rods, etc.
I ran across an older post regarding the different ratios in the M38 and A1 boxes. As I understand it the A1 has higher numbers or a higher ratio in the gearing. This would tell me if I remember my hot rod days, that it takes fewer turns of the wheel to get the tires to turn.One post I was reading said just the opposite, with some notations.
I am guessing this was incorrect, and the latest one here is correct.
I understand the higher ratio turns the wheels faster, but given everything forward of the Pittman arm on both the M38 and A1 are identical except for maybe beefier tie rods and a different mount for the bell crank, why would the later, higher ratio box be any less safe in the M38?
More horsepower would not seem to be a positive thing with a higher ratio.
Same wheelbase, same wheel and tire diameters, etc...
Am I missing something?
Just trying to understand.
Thanks. _________________ 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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wesk Site Administrator
Joined: Apr 04, 2005 Posts: 16251 Location: Wisconsin
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Posted: Wed Nov 01, 2017 8:58 pm Post subject: |
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I think you are confusing the terms. Hi ratio vs Lo ratio or Slower ratio vs Faster ratio.
Hi ratio = slower front wheel reaction to the steering wheel movement. More turns of the steering wheel for less movement of the front wheels.
Lo ratio = faster front wheel reaction to the steering wheel movement. Less turns of the steering wheel for more movement of the front wheels.
When comparing M38 to M38A1 front suspension They are not the same The A1 has reversed front spring shackles and the two jeeps have a different spring count and spring rate. The A1 also has 1" longer wheelbase. But more importantly the M38A1 with 12 more HP was usually a Faster jeep as well as a heavier jeep. It was the combination of these M38A1 traits that led to using a slower ratio (higher numerically)
Steering ratios are:
Early M38 = 15.4-13.5-15.4:1
Late M38 = 14-12-14:1
M38A1 = 19-17-10:1
The real danger in swapping ratios between the jeeps is putting the faster steering M38 gear boxes in the M38A1 not vs versa. _________________ 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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4x4M38 Member
Joined: May 30, 2014 Posts: 3447 Location: Texas Hill Country
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