420 or 465?

[Drey]

We were cleaning out a shed at work(we bought out another coop in town and are cleaning it up), and we found a good motor and tranny(or so the guys from the ag center said) It was a chevy small block, 350 or 327 they said out of a 60s straight truck. Rod took the motor, and i grabbed the tranny otherwise it was goin to the scrapyard in spencer. Its a 4 speed with a pto. I think its a Muncie 420. but not sure could be a 465.
Here are some pics, I think im going to hang onto it for the someday project...
And what is the circular thing on the back near the yoke? Thanks

 

[thatK30guy]

420 and parking brake.

 

[79k20350]

definetly a 420, its not ribbed like the 465

 

[pauly383]

Really low 1st gear , 7.00:1 . For some reason Shawn left a 2wd one in my backyard Y

 

[fatbob]

Actually some 420's had ribs and the granny gear is JUST 7 to 1. I can't see the bulge on the side, so it could be a 465. Here is a good link with lots of info about them and some other trannys. http://www.novak-adapt.com/knowledge/sm420.htm. IMHO the worst thing about the 420 is the price of the adapters to the T/cases.
The easiest way to tell the 420 from the 465 is the PTO ports.
the 465 has 2 and the 420 has 1

 

[u2slow]

You guys suck.

That's not a 420 or a 465.

That input looks fatter than usual. Top cover looks like its aluminum. Maybe an NP of some sort.

 

[Drey]

Its dark out now, and i dont have any flashlights up here, all my stuff is in my blazer back home, but ill look for some identification codes on it tommorrow and get some better pics. I did mess with the input and output shafts, nothing apears to be binding when i turned it by hand

 

[pauly383]

Sensory overload

 

[fatbob]

I bettin it's a np435. The PTO is in the correct side and there is only one so that rules out the 465. No bulge rules out the 420.
And gm used them untill 72

The NP435 was made by New Process Gear from 1964 to 1993. They are found in GM trucks until 1972, Ford trucks until 1992 and Dodge trucks until 1993. The 435 is an excellent heavy-duty truck transmission designed and used in ½, 3/4 and 1-ton trucks.

Identification
This transmission is 10.8" long and features an aluminum top cover that is retained by eight bolts. The NP435 case is of cast iron. There are two and four-wheel-drive models, the critical difference being in the bolt pattern of the rear housing. The Ford NP435 has a 1-1/16" diameter, ten spline input shaft that has a stickout of 6-1/2" from the front face of the transmission. The pilot tip of the transmission measures .668". The front bearing retainer flange measures 4.850" and the bearing retainer tube is 1.432" in diameter. The front bolt pattern is the symmetrical Ford "butterfly" pattern; 8-1/2" wide by 6-5/16" tall. The input shaft length is 6-1/2".

The NP435 enjoys the advantage of lower gearing than the T18. At 6.68-1, it is a popular choice for those wanting a very low crawling gear. Only the SM420 is lower.