How To: CMP C15A Restoration series, Pictures and video

[Louis Skebo]

Ive just researched my tranny and it looks like a chevy SM420 4 speed - SM meaning synchromesh. Seems like a heavy duty tranny used in military machines and diesels, cheap and easy to rebuild and used up until 1990 or so.


https://www.novak-adapt.com/knowledg.../manual/sm420/

[Greg]

Looking good.
Keep up the hard work.

Cheers
Greg

[Howard]

Good stuff, keep them pics coming!
H

[Grant Bowker]

The transmission was not originally a SM420. The original was not synchronised. I believe the SM420 is longer than the original which would either require moving the transfer case rearward or making the short shaft between transmission and transfer case even shorter.
Your windshield post does look as if it has received some "added reinforcement".
The latch dovetail looks very similar to that sold by Mac's for Fords of similar vintage. The part numbers are close but not identical.

[Louis Skebo]

Originally Posted by Grant Bowker

The transmission was not originally a SM420. The original was not synchronised. I believe the SM420 is longer than the original which would either require moving the transfer case rearward or making the short shaft between transmission and transfer case even shorter.
Your windshield post does look as if it has received some "added reinforcement".
The latch dovetail looks very similar to that sold by Mac's for Fords of similar vintage. The part numbers are close but not identical.

Yes I can see that the tranny isn't offset like the original according to the hump in the crossmember. I know better what they did once I get the box off....seems like a pretty simple transplant though.
Cheers.

Louie

[Louis Skebo]

Here is video #4 - cab removed
https://www.youtube.com/watch?v=pCXm...ature=youtu.be

Cheers.

Louie

[Kolten Hooper]

Thank-you for keeping us updated throughout your restoration process! I have been really enjoying your videos... keep up the great work!

[Grant Hopkins]

Here's what your windshield post would look like. The 2 slotted screws hold the pipe in the casting. The hex is the remains of a curtain stud for the door windows.

[Louis Skebo]

Ah ok that makes sense...tbe part number on the casting and screws had me tbinking. Thanks.