Another NP203 Question

[Dougnsalem]

Yes 27 or 10 are your options, 10 being for standard only. I would have him pick up a set of seals for the adapter housing, should be a front and rear of the same size. I would have him get the shifter too since they are getting hard to find one that don't need disassembled and fixed up. I would also have him get the sleeve. They can get grooved like the harmonic balancer. You can have a machine shop weld it up on a rotating jig, then turn it down for a new seal surface.

Since no one else is gonna say it, I will... You forgot something....

 

[Rusty Nail]

You're free to chime in at anytime Doug. It's a group effort...

 

[Dougnsalem]

You're free to chime in at anytime Doug. It's a group effort...

Thanks! Lol. Well, I haven't been here long enough to get to know people. However, there is one case.... I was expecting Honkey **** to tell him to pick up a big block while he was there.....

 

[Honky Kong jr]

Thanks! Lol. Well, I haven't been here long enough to get to know people. However, there is one case.... I was expecting Honkey **** to tell him to pick up a big block while he was there.....

That’s a given....that’s like saying water is wet.....

 

[crazy4offroad]

Honkey **** HAHAHA motherfvcker you fit in

 

[Dougnsalem]

Honkey **** HAHAHA motherfvcker you fit in

Lol. I just noticed that when I was reading his reply. Whoops. Totally unintentional.....

 

[MtBraun]

Thanks! Lol. Well, I haven't been here long enough to get to know people. However, there is one case.... I was expecting Honkey **** to tell him to pick up a big block while he was there.....

There's definitely a BB in the future of his 84 short box. Gotta get this kids plow truck more dependable so he can generate cashflow.

 

[Snoots]

Don't forget the 'bumper thingies'.

 

[Dougnsalem]

There's definitely a BB in the future of his 84 short box. Gotta get this kids plow truck more dependable so he can generate cashflow.

Yeah, I have to admit that I think the same as Honkey Kong on the cubic inch deal. In high school I put a 500 inch caddy in my 70 Nova. The BB Chevy stuff was too expensive for me. Actually, it still is. Good thing my truck came with one, or I'd be running something like a 70's 305 or 307. Lol. (Not knocking those motors people!!!)....

 

[MtBraun]

Yes 27 or 10 are your options, 10 being for standard only. I would have him pick up a set of seals for the adapter housing, should be a front and rear of the same size. I would have him get the shifter too since they are getting hard to find one that don't need disassembled and fixed up. I would also have him get the sleeve. They can get grooved like the harmonic balancer. You can have a machine shop weld it up on a rotating jig, then turn it down for a new seal surface.

I have a full seal kit left over from the TH350 rebuild. The guy told me at the time he couldn't buy the TC/Trans adaptor seal alone and had to buy the whole kit. That will come in handy now as the rear output shaft oil seal is hard as a rock. He was able to grab the shifter and linkage.

Not sure I follow you on the sleeve? What do you mean by that?

Also, I pulled the tailhousing off when he got home to inspect his work. It is a non-converted unit but I could tell at some point it had been opened up. Probably not surprising for something 40 years old. Anyway, it supposedly came out of a 78 which is what I wanted, but the pictures of my output shaft and where it meshes with the rear diff gear is different than the pictures in the thread I used for guidance.

See in my first pic there is more of a shoulder where the two gears mesh.

Second pic, there was no thrust washer or bearing riding on the short stub shaft where the output shaft rides. Is this a problem?

And last pic, I assume that speedo gear is toast?

Here is the link from earlier in this post. I used this as my instruction to my son in what to look for.

http://www.off-road.com/trucks-4x4/tech/new-process-203-transfer-case-tech-20599.html

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[Snoots]

Here's a link for the OEM NP203 Visor Label in my truck.

http://www.gmsquarebody.com/posts/338286/

Hope that helps.

(On mobile so link may not work. I'll check in the morning.)

I wonder if jrgunn5150 makes these too? I just got some GMSquarebody decals from him that are awesome!

 

[MtBraun]

Yeah, I have to admit that I think the same as Honkey Kong on the cubic inch deal. In high school I put a 500 inch caddy in my 70 Nova. The BB Chevy stuff was too expensive for me. Actually, it still is. Good thing my truck came with one, or I'd be running something like a 305 or 307. Lol. (Not knocking those motors people!!!)....

For me it depends on the application. We have a 69 F100 that was my grandpa's last truck bought new. It would have come with a 360 but will get the long rod 400. Technically not a BB but lots of torque for not a lot of money. The 84 short box will get a punched 454 or 427 TD. The 84 will end up on stilts with big tires so gotta have plenty of torque to turn them.

For cars my GN ownership has me a fan of smaller displacement forced induction systems.

 

[Dougnsalem]

For me it depends on the application. We have a 69 F100 that was my grandpa's last truck bought new. It would have come with a 360 but will get the long rod 400. Technically not a BB but lots of torque for not a lot of money. The 84 short box will get a punched 454 or 427 TD. The 84 will end up on stilts with big tires so gotta have plenty of torque to turn them.

For cars my GN ownership has me a fan of smaller displacement forced induction systems.

Oh yeah, gotta take that stuff into consideration. We don't drive the truck much, and this is the first BB that I've finally gotten, so I'm having fun with it. For a daily driver I'm good with an escort or caravan... Lol.

Man, how long have you had the GN? Have you posted pics? I have 2 vehicles on my bucket list, that I have wanted for YEARS. A Countach, which have come down in price for the old ones. The other is a GN. Dang. One of the dudes in our cruising group had one. It was SO quiet. Sounded like a Cadillac. It also ran mid 10s in the quarter.... Amazing cars...

 

[crazy4offroad]

Yep that speedo gear is toast. For "sleeve" I was referring to the coupler but it's been a while since I've worked on one, yours may just have a female input shaft. Some have shims there for endplay and some don't need them. The only thrust bearings I saw referenced were deeper in the case, or at the spider gears. Lots of good info here...
http://www.fourwheeler.com/how-to/47538/
Be aware there were ford and dodge variants with a few differences.

 

[MtBraun]

Yep that speedo gear is toast. For "sleeve" I was referring to the coupler but it's been a while since I've worked on one, yours may just have a female input shaft. Some have shims there for endplay and some don't need them. The only thrust bearings I saw referenced were deeper in the case, or at the spider gears. Lots of good info here...
http://www.fourwheeler.com/how-to/47538/
Be aware there were ford and dodge variants with a few differences.

There's no coupler on ours. Only a female input shaft. The thrust bearing I'm referring to is in this picture. This article references a 75 Blazer NP203 so I wonder if there are some design changes in the 78. Ours definitely doesn't look like this. When we get to dropping the original, we'll double check everything.

https://ck5.com/forums/resources/mile-marker-np203-part-time-kit.68/

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