I think Tanner is working something similar. I'm putting a BBC in my m725, I found this flange to adapt the trans output to the rest of the Ujoints. 1310 I think. 2-2-579 flange
Did a little searching around and cross referencing...
If I have this right the duece uses a 1410 retainer plate style ujoint on the front of the intermediate shaft, and the M-37 uses a 1310 inside snap ring ujoint.
A quick hunt shows a neapco #2-3190 is a 1410 outside snap ring to 1310 inside snap ring conversion u-joint.
Or also a spicer #2-2-579/neapco #N2-2-579 would bolt to the spicers output flange and is a 1310 outside snap ring ujoint flange. Might need a spacer though to clear the spicer's output shaft nut.
Or what's looking like the most sensible thing so far is a Spicer #3-2-429/Neapco #N3-2-429 flange that should bolt to the spicer's output flange and takes an outside snap ring 1410 ujoint, and use the Spicer#5-357X/Neapco #2-3190 conversion ujoint from to go from the 1410 outside snap ring to the 1310 inside snap ring of the M-37 intermediate shaft u-joint to mate to my intermediate shaft.
Anyone see anything wrong there?
As far as I can tell this is also a good cross reference for the M-37 intermediate shaft u-joint #.
Did a little searching around and cross referencing...
If I have this right the duece uses a 1410 retainer plate style ujoint on the front of the intermediate shaft, and the M-37 uses a 1310 inside snap ring ujoint.
A quick hunt shows a neapco #2-3190 is a 1410 outside snap ring to 1310 inside snap ring conversion u-joint.
Or also a spicer #2-2-579/neapco #N2-2-579 would bolt to the spicers output flange and is a 1310 outside snap ring ujoint flange. Might need a spacer though to clear the spicer's output shaft nut.
Or what's looking like the most sensible thing so far is a Spicer #3-2-429/Neapco #N3-2-429 flange that should bolt to the spicer's output flange and takes an outside snap ring 1410 ujoint, and use the Spicer#5-357X/Neapco #2-3190 conversion ujoint from to go from the 1410 outside snap ring to the 1310 inside snap ring of the M-37 intermediate shaft u-joint to mate to my intermediate shaft.
Anyone see anything wrong there?
As far as I can tell this is also a good cross reference for the M-37 intermediate shaft u-joint #.
Seems like you might be correct re the need for a spacer on the back of the 3053A to clear the nut. I ran across someone else on the Web doing a 3053A swap & noted that they used a spacer maybe 1/2" thick(?) to makeup trhe difference in length. I'm not quite to the engine drop in stage yet on my M37, as I am still working to get the old trans mounts removed from the frame.
'Tanner'
__________________
"There is lots of information to be found here on SS; some of it is even accurate..."
Something that I considered earlier today in thinking about this was the possibility of making a thicker spacer like you did, but making it with 8 through-holes... One set of 4 holes matches the Spicer 3053A flange pattern & the other set of 4 holes matches the stock M37 flange pattern...
"Tanner"
__________________
"There is lots of information to be found here on SS; some of it is even accurate..."
Something that I considered earlier today in thinking about this was the possibility of making a thicker spacer like you did, but making it with 8 through-holes... One set of 4 holes matches the Spicer 3053A flange pattern & the other set of 4 holes matches the stock M37 flange pattern...
"Tanner"
That's my backup plan, a 3/4" steel disk adapter that both flanges bolt to. I've seen it done before.
Ok since we know that the 1310 flange needs a spacer I think I'll try the 1410 flange and the 1410>1310 conversion ujoint first though. It might have a chance at clearing the nut on the tail shaft where the 1310 won't..
If nothing else we'll all know if it works or not.
Is there a preferred or good place to buy neapco or spicer parts on the web?
Chris, Gimpyrob has the best place to buy it price wise that I have found. See his thread about his M725 build on the Zone or my thread about it on the Zone as well. He list out the contact info.
The little adaptor I built really takes up room under the truck. It clears the floor ok, but made us take another inch or so out of the stock cross member. I don't remember how the M37 held the back of the transmission up, but you might run into trouble if you are trying to adapt the stock cross member. If you have cut everything off, then it won't be a problem. Another option is to us the bellhousing mounts all of the Chevy to 3052A bellhousings have. I didn't because they block the pto shaft for a winch. Those mounts by the way make a lot of things real simple.
__________________
"If you didn't build it, you can't call it yours."
Spicer 3053a in an M-37
