NP241c driver's side drop driveshaft

[Nick1224]

Hey guys. I have an early NP241c with the long flange front output. I took my driveshafts along with the chevy stockers to my driveshaft guy and he advised me to keep the double CV on the front driveshaft.

I thought I could just swap the front yoke for a CV style (153 1310), but because this is an early long yoke case, no one makes sucha yoke...only ones with 2" through hole dimensions.

What have others done with the front driveshaft in this swap? Anyone know where I could find a yoke like this?

Oh, the end of the front driveshaft near the D44 has to be thinner than 2.5". THere is not much room with the exhaust.

Thanks!

[chrism]

I have an NP241 in my wag with the stock GM non-cv driveshaft. It works but I have a lot of vibes since the pinion angle is set up for a full time case and CV driveshaft.
My local 4x4/driveline guy says to get a CV front driveshaft from a GM solid axle truck with a 700R4. It will bolt up to the flange but you will need a saginaw to 1310 conversion ujoint to connect it to the dana 44. You may still need to get the length changed by your drive line shop since its a swap. he told me though that since I am using a stock GM shaft now I should be able to find a CV shaft thats pretty close. I have not gone looking for one yet though.

[Nick1224]

Cool. I'll tell my guy.

He called and said he found something that might work....fingers crossed. If not im going to the junkyard and hunting for a newer np241 or a yoke that could work.

[Nick1224]

So no luck with the old output. Bough tr the shorter front output and will swqp that in. found a cv yoke and driveshaft from a durango that looks promising.

[Nick1224]

Pulled apart the case and re-sealed it. The shorter chevy front output shaft swapped right in. Now I can use the durango cv yoke and hopefully the durango front driveshaft too.

Just waiting on my case saver to replace the main output snap ring....a known weak point.

[Nick1224]

The front output yoke from the Durango seems to fit well. Much shorter should make the angle even less.

The seal is definately tight. I used some petroleum on the seal. When in 4Hi it does take a bit of effort to rotate. That should get better once she runs a bit, right?

[REDONE]

Thanks for keeping us updated despite a lack of posts! Good info!

[Nick1224]

Trying to keep info here for future swappers. I'm going to do a big writeup once the whole swap is done with all the partnumbers and other difficult to find stuff.

I got the stock GM cluster today. It's a bit larger, but I wanted to re-do te dash anyways. It would be nice to have OEM parts for replacement later on. Plus, it has a tranny temp gauge!