Transfer Case

[qboy]

I've got a 1975 GMC K15 short bed 4x4.   How can I tell if I have an NP203 or an NP205 transfer case?

[VileZambonie]

What's your shift pattern? Look on the back of the transfer case for a tag. Is there an aluminum extension housing or is it all cast iron?

[joesgarage71]

 If it has a drain plug its a 205
If not a 203

[blast]

Pics:  http://www.chuckschevytruckpages.com/drivetrains.html

[87GMC2WD]

what other kind of transfer cases are there. i dont have either of those two.

[VileZambonie]

Did you look for the tag? Take a pic

[76_Scottsdale]

87GMC2WD

You may have a NP208. Check out that page to see what you have.

[Blazin]

208s were not offered until 81, 82 ish.

[Fordeatinz71]

yes but lets remember swaps do happen...

[Blazin]

Yes, but not useually a down grade!!!!!

[87GMC2WD]

well i have a 83 blazer and a 84 k20. the blazer i just got and is only a rolling chassis. that transfer case has a NP tag on it that i think says 203. the truck has no tag w/ 2hi 4hi n 4low.

[Donut]

Is the transfer case alum or cast iron?

2hi 4hi n 4low.  that's the shift pattern, might be on the TC shifter knob.  The link Blast gave you helped me identify mine.

[87GMC2WD]

i looked at the tag again i think that it might be a 208. cleaned it with some brake clean and it looks more like an 8.
Blazin, you said the 208's are a downgrade. what is the difference and why are they worse.

[blast]

here's a np208, does it look like this?

[VileZambonie]

They're not a gear drive unit but for regular street and offroad use they're great. If you are a serious offroader not so good.