ID this tranny

[agjohn02]

nope its not RuPaul...


its a manual transmission in my dad's 1968 chevy c50 winch truck. shifter knob says its a five speed but im doubtful of that. its got a pto for the monster winch on the drivers side and a pto cover on the passenger side. i just looked at it again in the dark and got some pics but i left my cable in cs. ill post them up when i get back. is this going to be a sm465?

[CRaSHnBuRN]

sm420 maybe?

[Reckless]

in my grandads 70 c20 chevy winch truck, he had a 465

[agjohn02]

sm420 maybe?


last year for them was 67 and they only have one pto cover on the drivers side.

[agjohn02]

just figured out that my comp takes memory cards in a slot on the side

after looking at novak's site i dont think its a 465. it may be some kinda wierd old 5 speed.


that doesnt look like your average pto box does it?

btw, thats the back of the trans you're looking at.

[Fredo]

looks like a 465 to me

[agjohn02]

check out the drivers side pto port, how far back it is and how far it sticks out and downward.

it might be. im just saying, is all

compare to this:
http://www.novak-adapt.com/images/pics/sm465_transmission.jpg

[agjohn02]

also, look at the bottom of the rear cover bolt pattern

compare to this:
http://www.novak-adapt.com/images/graphics/SM465_exploded_bw.gif

[agjohn02]

ill crawl up under it tomorrow in the daylight when i can see snakes and get a better picture

[agjohn02]

i googled and found a pic of the rear of a 465. turns out it davido's.

you cant see the d-side cover from the rear. you can see the ribs. not on the one i have though.

http://offroadrepublic.com/fj40/chapter4/klune_sm465_rear.jpg

[agjohn02]

figured it out

its one of these:

clark 280V 7.48 , 4.38 , 2.40 , 1.48 , 1
clark 280VO 5.98 , 3.5 , 1.86 , 1 , .80
clark 282V 6.99, 4.09, 2.17, 1.17, 1.00
clark 285V 6.99, 4.09, 2.24, 1.46, 1.00

im pretty sure its not the 285 and crossing my fingers its the 280v. still dont know if anything will bolt behind it though.

[agjohn02]

i got a casting number but it tells me squat so far.

[agjohn02]

i really just need to host these so i can post em on pirate, but maybe these pics will help some. grayson?

[eight]

Yea those 5 speeds were pretty common in all the old grain trucks, I'd say more than the 4 speeds. But I don't think I'd be wanting to put it in anything.

[agjohn02]

it was on the glovebox door, NP541GL

New Process 541GL 7.25:1 3.88:1 2.19:1 1.37:1 1.00:1 R7.22:1

[agjohn02]

Yea those 5 speeds were pretty common in all the old grain trucks, I'd say more than the 4 speeds. But I don't think I'd be wanting to put it in anything.


i dont see why not as long as you can get a t-case behind it.

[eight]

Big, heavy. Most of the ones I drove had to be double clutched. Would make a good theft deterent. You know how I say I don't like how long it takes to shift my 435? Those are worse. The one's I'd drive were 40-50 years old though, but most should have had less than 50K on them.

[agjohn02]

thats just from being worn out, much like the one in your jeep. they weight about 20lbs more than a nv4500 and are about the same size, maybe 2" longer. im not too optimistic, its more of a curiousity thing. they ran from 1957-69 so im pretty sure parts and adapters are rare.

[agjohn02]

theres a company that makes adapters for the clark transmssions, i think one would make a great offroad trans.

[eight]

well then do it.

[agjohn02]

i will

[eight]

good

[agjohn02]

good

[Graystroke]

I would have pegged it for a clark. they came in old dump trucks and buses. straight cut gears behind an oil burner would be great. no clutch needed w/ the small range of revs. double-clutching is for pussies who don't know how to drive