swapping stuff...hopefully

[adaml23]

So correct me if I'm wrong but I have to have a front driveshaft in to be able to drive with my np203 TC? I'm trying to get a truck going that hasn't driven under its own power for close to ten years... Tried to drive it today for the first time after working on it for about 10 months and it would only move in L1 and reverse....FML...

If that's the case, I gotta do some swapping (I think). I have no front driveshaft in because I put 3/4 ton 3.73s in the rear but still have my original 1/2 ton 3.08s in the front. I have a different front 3.73 3/4 ton axle that'll eventually go in but I want to rebuild it before throwing it in with a loft as well. It does have manual lock outs on it already though.

My questions are: Will the manual lockouts from the 3/4 ton front axle fit the 1/2 ton axle so I can just swap them and run the original axle with front driveshaft in it for now (2wd)?

Also, what's the part number for the front driveshaft u joint? Is there a difference between 1/2 ton and 3/4?

Thanks for the help in advance.

 

[77 K20]

So your NP203 is still a full time unit, right? It isn't good for the transfer case but it can move if you have it in high lock or low lock. This locks the center differential and will send power to the rear driveshaft.
That being said- it puts a lot of stress on everything and shouldn't be driven like this for long.

 

[firebane]

So correct me if I'm wrong but I have to have a front driveshaft in to be able to drive with my np203 TC? I'm trying to get a truck going that hasn't driven under its own power for close to ten years... Tried to drive it today for the first time after working on it for about 10 months and it would only move in L1 and reverse....FML...

If that's the case, I gotta do some swapping (I think). I have no front driveshaft in because I put 3/4 ton 3.73s in the rear but still have my original 1/2 ton 3.08s in the front. I have a different front 3.73 3/4 ton axle that'll eventually go in but I want to rebuild it before throwing it in with a loft as well. It does have manual lock outs on it already though.

My questions are: Will the manual lockouts from the 3/4 ton front axle fit the 1/2 ton axle so I can just swap them and run the original axle with front driveshaft in it for now (2wd)?

Also, what's the part number for the front driveshaft u joint? Is there a difference between 1/2 ton and 3/4?

Thanks for the help in advance.

NP203 = full time = requires slugs
NP203 converted to part time = locking hubs

NP203 does not require front drive shaft but you will have to drive the transfer case in 4HI all the time.

 

[adaml23]

Yes it still is full time. And yes I'm aware that is not good for it after Google told me . I did drive it around the house in Lo Lock but that was it.

 

[adaml23]

So does it sound to you guys like my tranny's going or does my problem have to do with my TC?

 

[adaml23]

Can I run two different great ratios in there if I don't run it in hi-loc or lo-loc?

 

[PrairieDrifter]

You cant run two different gear ratios. Not good! haha

 

[adaml23]

Sorry about that last question, I was talking with my Dad and he had me confused... What I meant to ask was if I could have to different axle ratios in and install a set of manual locking hubs and set them to FREE to get by for a little while (2WD) so I could clean up my correct ratio front axle over the winter before installing it...

But I've decided to just go ahead and throw the correct axle in this weekend without cleaning it up just to get this sucker on the road asap. I've got a deadline in about 2-3 weeks when my wife's due...