I've got what I believe is small diameter(1.68) t400 slip yoke on a 61" long driveshaft. From looking around the interwebs, some are saying it's an early t400 from the 60s, possibly Buick. It's not a rubber 2 piece tube. Anyone got any idea what it's off of? Is it rare? Picked it up at a swap meet years ago because it was the longest one in the pile and was planning to use it for my 66 but don't need it anymore. A buddy at work was looking for a 57" long driveshaft for a 40s street rod truck project and I was going to give him this driveshaft to use as a starting point to shorten to fit his project. But if it's something rare...? I'll probably pull and keep the yoke since he already has one, but the 61" long driveshaft is pretty long. So...any info on this? Thanks.
I have a 67 sp 400 from a full size car and it uses the thin wall yoke. My sp400 in my 67 gs uses the thick walled yoke. I believe heavy duty built transmissions got the beffy yoke as i also have a trans from a bigblock pontiac that uses the thicker yoke also. Not sure what later years use
X2 unless fie some reason you found a shafts out of something with th375, basically a 400 with a 350 outputshaft
I know they used the thin yoke in 65-66 ST-400's too, thats probably what you've got. Neat for someone doing a restoration maybe, but anyone doing a build will probably just switch over to the stronger yoke and pretty common matching tailshaft housing.
My first TH400 from a 68 Pontiac had the the small dia yoke, which I used for years. But later to standardize things here, I changed tail piece so they all used the larger dia. I don't see any value in the smaller yoke. Don't confuse this with a TH375 trans, which uses the much SMALLER OUTPUT SHAFT of a TH350, and other downgrades. Bruce Roe
