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: SM420 Decode

Mark '73 FJ40
02-02-2002, 10:47 AM
Who posted how to decode the SM420 serial numbers and where is it??

Thanks, I can't find it.
Mark '73 FJ40
02-02-2002, 11:02 AM
http://members.shaw.ca/m.nelson/trucks/DCP00494.JPG
http://members.shaw.ca/m.nelson/trucks/DCP00495.JPG
http://members.shaw.ca/m.nelson/trucks/DCP00496.JPG
Berg
02-02-2002, 11:07 AM
http://members.home.net/cglabe1/sm420/sm420.html

look down toward the bottom of the article.
Berg
02-02-2002, 11:11 AM
That's either a SM 465 or NP 435 32 spline I think.............somebody else chime in here!


Hey mark .......how do you post pics without the little red star??
did you brown nose somebody?:)
Mark '73 FJ40
02-02-2002, 11:18 AM
they're linked to my website.... :D

I pulled it out of a 67 Chev 3/4 ton.


So what is it??
Pin Head
02-02-2002, 11:48 AM
It appears to be a 2wd sm465.
Check out advanced adaptors tech pages. They show all the commonly-used trannys.

http://www.advanceadapters.com/acrobat/gtrans.pdf

The code is a date code in the casting. The letter (A-L) corresponds to the month. It is followed by two digits for the day and two digits for the year. As an example H3061 is August 30, 1961.
Mark '73 FJ40
02-02-2002, 12:16 PM
yeah, I was just on Woody's site and it looks like.... a match

http://woody.ih8mud.com/images/tech/sm465-2.jpg
Berg
02-02-2002, 12:33 PM
Woodys tranny is a ten spline sm465....be careful to note that it gets rather $$$ to use a fine spline 2wd tranny with a AA adapter.

from the AA catalog is says "1968 to 88 2WD version use a 35 spline output shaft,which is easily adapted; howeverthe oputput shaft length requires it to be shortened."

sm465 to 35 spline trans.
AA part number........50-4901 3 speed t-case

AA part number........50-4902 4 speed case

I dont think you can use a plate adapter with a 35 tooth fine spline. IMHO
AIRZUKI
02-02-2002, 04:57 PM
it's simple........ one PTO plate ..... SM420

two PTO plates..... SM 465.....

that's a 2wd 465...
KMAN
02-02-2002, 05:33 PM
I am pretty sure SM420 only had 10 spline output shafts.

Kman
Pin Head
02-02-2002, 05:38 PM
Originally posted by KMAN
I am pretty sure SM420 only had 10 spline output shafts.

Kman


There were supposedly some 32 spline output shafts on 50 series 2 ton trucks, but I have never seen one. You want the 10 spline.
Lord Baskerville
02-03-2002, 09:07 AM
I have a 34 spline output 420 in the shed...
Probably a 68...
Insides look identicle to older 420's but some shaft dia. are different.
I used a bearing out of it to replace a bad bearing in a 420 I am going to use in my 40.
Syncros etc look the same, but, I've heard that some later 420 parts are slightly different in size. (I'd measure)
Your tranny looks like a 465.


Cory