Power Wagon Advertiser Forums Vintage Powerwagons Power Wagon Advertiser Magazine

Go Back   Power Wagon Advertiser Forums > MILITARY & CIVILIAN DODGE TRUCK RELATED FORUMS > Diesel powered trucks, engines, & conversions

Diesel powered trucks, engines, & conversions All matters diesel; original and conversion, operation & repair

Reply
 
Thread Tools Display Modes
Old 09-14-2004, 11:43 PM   #1
dshock
Registered
 
Join Date: Jul 2004
Posts: 14
Diesel Powered M37

I just bought an M37 with a Detroit Diesel engine. The truck is very nice, but I am trying to determine a few pieces of information. The engine and transmission were originally intended for a Gama Goat. The transmission is a four speed with reverse down and left. I have read that it could be a GM 420 or a 465. I need to do some work on it, and need to know how to identify it. After doing so, I need to source a PTO for this transmission. If you have any info on this transmission, the pto, or have a source for winch related parts, please let me know.

Please see my add in the classifieds, because this truck would be a lot better with a winch!!!

Thanks,
Dan
Attached Images
File Type: jpg trans 4.jpg (68.2 KB, 211 views)
dshock is offline   Reply With Quote
Old 09-15-2004, 03:47 AM   #2
Chris Olson
Registered
 
Join Date: Jul 2004
Location: Vancouver B.C.
Posts: 163
It looks like a GM SM420..
The easy way to tell an SM420 from a SM465 is the length.. the 420 has a case length of 10.5" the 465 is 12"
also the 465 has two PTO ports and the 420 only one on the drivers side.

I personally run an SM420 in my 1948 Willys Jeep.. I like the super low first gear (7.05:1) but there is a large gap in the gears between second and third, with a Diesel I would say that a 465 would be a better choice
Chris Olson is offline   Reply With Quote
Old 09-15-2004, 07:08 AM   #3
Gordon Maney
Editor/Publisher PWA
 
Gordon Maney's Avatar
 
Join Date: May 2003
Location: Iowa County
Posts: 6,964
Do you happen to know the approximate year ranges that these two transmissions were used?

I seem to recall that a 1980 Chevy pickup I had was equipped with the SM465; does that sound right? I am curious when the SM420 was used.
__________________
Power Wagon Advertiser monthly magazine, editor & publisher.


Why is it that the inside of old truck cabs smell so good?
Gordon Maney is offline   Reply With Quote
Old 09-15-2004, 08:47 AM   #4
dshock
Registered
 
Join Date: Jul 2004
Posts: 14
PTO source

Do you know where I could get a PTO for this transmission? Does anyone have a used one? I guess it should be pretty easy to get parts for.

Thanks for the id.
Dan
dshock is offline   Reply With Quote
Old 09-15-2004, 01:41 PM   #5
Chris Olson
Registered
 
Join Date: Jul 2004
Location: Vancouver B.C.
Posts: 163
the Sm420 was used from the 40's up unto 1968 in Chev's and GMC's up to 2 ton.. the 420 was available with a brake on the output.
there was a year or two when Chev used a NP 435 then the SM 465 was used up to around 1988-1990
Chris Olson is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are Off
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 09:42 PM.


Powered by vBulletin®
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright ©2002 - 2014, Power Wagon Advertiser. All rights reserved.