The Stovebolt Site Forums The Shop Area Driveline need help indentifing a transmission

Would anybody be willing to PM me there phone number, so I can text them pictures of my GM tranny, and see if they can identify it? Apparently I'm not smart enough to link pictures from my phone to on here. IT was hooked to a 1958 261 engine I acquired.

TIA.

Here ya go Brian. Danged if I know what it is.
but it's not an SM420 which I thought would have been behind a '58, 261:
http://www.pbase.com/dennygraham/oddball_transmissions

Got nothing for '58 transmissions, but if it's the same as
the '59 this might help:
http://chevy.oldcarmanualproject.com/chevyresto/59tsn04.htm
Looks like it could be a New Process or Spicer.
Try to find some numbers on it.
Denny Graham
Sandwich, IL

Here are 1958 transmission codes.

Here is 1958 Spicer info/illustrations.

Here is 1958 New Process info/illustrations.

Can't sleep either huh?
Numbers will tell Tim, but by looking at the shifter cover, it
looks like a New Process.
To bad that 5th speed wasn't an over drive, I'd think about
using that in my '50.
Think we're zeroing in on it Brian. I'd bet Ken has seen a
bunch of these.
dg

Denny and Tim thanks for the help. I'm thinking it's a new process since reverse position is up and to the right. This thing must of come from a pretty good size truck. I'll and get numbers and post them later.

Clark and New Process both have reverse toward the right and up towards the dash. New process has 1st to the left and towards the dash while Clark has first to the right and toward the seat. They both come in direct and overdrive. In the mid 50's, New Process was more popular with 5th over than Clark with 5th over.

Found a saw tooth circle with NP close together in the circle. Also found a 6-10-58 date, and a C-911-71 number. The PTO on the side had serial#9070494 model# BAC86 2B. Arrow Gear. Broken Arrow O.K. Does this thing have any value? Or should I take it to the scrap yard to be turned into 3 Subaru's it's HEAVY!!! again thanks for the reply's.

People who are restoring trucks a little larger than a 2 ton could use it, But finding someone who needs it may be difficult. The ones with overdrive or the close ratio between 4th and 5th are the most desirable. If you have a shed and are not crowded for space, it is worth keeping. But if you have no space, sometimes you have to do what you gotta do.

NP-540,,541,542 series, keep it, or advertise it, they are good trans'. I put one in an early Bronco behind a Buick V6, really liked it. Great for starting with a load, get going in first, 4 close ratios thereafter. Ones with Chevy bolt pattern and short input shafts are hard to find.

Ed, mine has the Chevy bolt pattern and the 6.5" short input shaft. So again Denny, Tim, Ken, and Ed, thank you for helping figure out what I got.