Transmission info and input shaft play

[TylerB46]

Hey folks, I’m having trouble identifying my transmission is casting number is c-39701. Im trying to figure what year its from because I want to order a gasket set for it, and also it has what seems like quite a bit of play in the input shaft. I’ve never worked on a transmission before so I’m curious as to how much play is normal, and what would help fix it, just a new bearing or something? Anyways I just thought I’d ask, I can’t seem to find much about it online. Thank you

[DJ194950]

My give these folks a call as I have read on the forum that others have gotten parts for their old Mopars here.

 

http://www.nwtparts.com/

 

DJ

[David A.]

I may order a part from these people in the future, but I would never have them make a part for me!  I had them make a transmission cluster gear shaft and it was horrible! The machining marks were terrible. It would have destroyed the needle bearings in short order, plus it wasn’t heat treated properly. I was suspicious after looking at it so I took it to a machine shop and asked them to check the hardness. It was just unhardened mild steel. 

They did refund my money, but I wasted a lot of time. 

[TylerB46]

1 hour ago, David A. said:

I may order a part from these people in the future, but I would never have them make a part for me!  I had them make a transmission cluster gear shaft and it was horrible! The machining marks were terrible. It would have destroyed the needle bearings in short order, plus it wasn’t heat treated properly. I was suspicious after looking at it so I took it to a machine shop and asked them to check the hardness. It was just unhardened mild steel. 

They did refund my money, but I wasted a lot of time. 

That’s good to know thanks

[Radarsonwheels]

I don’t know how floppy your shaft is but they can be a little sloppier than you’d maybe think compared to a motor’s crankshaft. The pilot bearing in the back of the crank should keep the input shaft’s nose pretty much dead center.

 

My buddy put a t5 in my truck when he owned it for a while but I have only pulled and installed stock trannys on our trucks, never swapped them out or got creative but on the 70s mopar stuff the bellhousing was machined concentric while married to the actual block it goes with and a swap to another trans calls for indexing the bell so that the input shaft doesn’t end up going in little circles instead of spinning true. 

 

Hopefully folks that actually know about the old stuff will chime in! Good luck!

[TylerB46]

3 hours ago, Radarsonwheels said:

I don’t know how floppy your shaft is but they can be a little sloppier than you’d maybe think compared to a motor’s crankshaft. The pilot bearing in the back of the crank should keep the input shaft’s nose pretty much dead center.

 

My buddy put a t5 in my truck when he owned it for a while but I have only pulled and installed stock trannys on our trucks, never swapped them out or got creative but on the 70s mopar stuff the bellhousing was machined concentric while married to the actual block it goes with and a swap to another trans calls for indexing the bell so that the input shaft doesn’t end up going in little circles instead of spinning true. 

 

Hopefully folks that actually know about the old stuff will chime in! Good luck!

Looking at it, I don’t think it’s too much play, but I want to take it apart and put new gaskets cause I’m sure they’re wore out and will leak.