What kind of Transfer Case is it?

[jlower1499]

I have an 86 K5 and I am trying to figure out what kind of T/C it has in it. The only markings that I see on it is 1508S next to that it says NP. Can anyone correlate this to a NP208 or any other model? These markings are on the back of the T/C to the right of the output shaft cover. Is there somewhere else that the T/C will be labelled? Thank you in advance for your help!

 

[ryoken]

chances are it's a 208 if unmolested...

 

[jlower1499]

Yeah that's my fear. I just bought this truck and the previous owner was even more clueless than me. So there's no telling.

 

[lectric80]

Take a couple pictures and we can get it close. At least usually we can tell you.

 

[jlower1499]

I cant attach pics for some reason?

 

[jekquistk5]

I cant attach pics for some reason?

you need to be a paying member to attach pictures directly from your pc, but you can link from other sites such as photobucket or picasa

 

[diesel4me]

There should be a metal tag riveted to the case ,in the frint above the frint drive shaft,with the model numbers on it and the gear ratio...I'd guess it has a NP208 or possibly a NP241..

 

[jlower1499]

Please see the pics at this URL: http://s1136.photobucket.com/albums/n483/jlower1499/

I'll check for the tag as well. Thanks.

 

[jlower1499]

No tag found.

 

[496truck]

NP208 or NP241

Most likely the 208 cause that was what came original.

 

[nvrenuf]

Looks like an unmolested np208.

 

[jlower1499]

Thank you for your input!

 

[6.2Blazer]

You actually would need to clean all the crap off the t-case to read the tag.

I can see the tag in the pictures.......look on the back of the case and there is a round circle held on with a screw in the middle along the bottom edge. Wipe it off and it will say NP208 on it.

 

[blazinzuk]

tag circled in red. You can link photobucket pics here using the image code, just copy and paste it and you will get a pic. Clean that tag off and it should say 208 and give you the low range which is 2.62 I think.

 

[jlower1499]

Yepper, that was it! Thanks for the help. It is a 208 and I beleive the Low range was 2.61. Eitherway, you have helped me to confirm. Thanks again!

 

[4X4HIGH]

As others have already said and as you found out it is an NP208. Do yourself a huge favor though and get rid of those spacers between the frame and t-case crossmember if you don't want a cracked frame to repair. Those spacers are factory but were actually on the top side of the frame rail and someone has moved them to try and drop the t-case to eliminate a driveline vibration. You need to replace the spacers with a piece of flat bar steel the same thickness but that is the same width as the crossmember.

 

[84 k5 blazer]

One other thing, I noticed that the torque bar is missing that bolts up to where you see the big bolts and extends up to a transmission to engine bolt.

 

[Avery4jc]

Here's what it should look like with the spacers in the factory location and the arm bolted back up...

 

[K85 Octane]

As others have already said and as you found out it is an NP208. Do yourself a huge favor though and get rid of those spacers between the frame and t-case crossmember if you don't want a cracked frame to repair. Those spacers are factory but were actually on the top side of the frame rail and someone has moved them to try and drop the t-case to eliminate a driveline vibration. You need to replace the spacers with a piece of flat bar steel the same thickness but that is the same width as the crossmember.

agreed 100%
some PO did that on my truck and for no reason, it's only a ~2" lift
I put it back to stock (no drop or anything) and it runs 0-80mph smooth

sounds like, with this truck, you may be suffering previousowneritous

 

[KansasTwister]

pretty sure you can tell a 241 from a 208 because the 241 had a 2 piece tailshaft, but i may be wrong.