The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 02-12-2015, 04:00 PM   #1
J Williams
Registered User
 
J Williams's Avatar
 
Join Date: Jun 2014
Location: Paul idaho
Posts: 192
77 chevy cast iron transfer case

Can anyone tell me what is so special about this transmission. I have been told it is worth a chunk of change to rock crawlers. I have one that everyone keeps telling me there is a market for it but I have yet to find anyone that wants to buy it. This is not a post to sell it. It is just an information inquiry to see what is so special about it. Thanks for your time.
__________________
63 C10
J Williams is offline   Reply With Quote
Old 02-12-2015, 06:20 PM   #2
enaberif
Registered User
 
Join Date: Jan 2009
Location: Calgary, AB
Posts: 1,181
Re: 77 chevy cast iron transfer case

Uhm... NP203 or NP205? The NP203 can be doubled to the NP205 but other than that eh nothing special.
enaberif is offline   Reply With Quote
Old 02-12-2015, 08:04 PM   #3
whiskeydented
Registered User
 
whiskeydented's Avatar
 
Join Date: Dec 2006
Location: connecticut
Posts: 261
Re: 77 chevy cast iron transfer case

If it's a 203 that's behind a turbo 400 it could be worth something. I've sold some of those for a few bills.
whiskeydented is offline   Reply With Quote
Old 02-13-2015, 09:50 AM   #4
andrewmp6
Registered User
 
Join Date: Jan 2009
Location: Louisville,Ky
Posts: 5,816
Re: 77 chevy cast iron transfer case

If its a np205 that is the one everyone wants,If if its the np203 its only good to build a doubler out of really.Look on the t case for a tag or post a picture of it from the rear we can id it.
andrewmp6 is offline   Reply With Quote
Old 02-14-2015, 07:11 PM   #5
Damien
Registered User
 
Damien's Avatar
 
Join Date: Mar 2007
Location: Farmington, MN
Posts: 919
Re: 77 chevy cast iron transfer case

The NP205 is a gear drive unit that off road guys like for it's strength. The NP203 is a chain drive unit and as stated above can be used to make a "doubler" for further gear reduction. The NP203 and NP205 have low range gear ratios of about 2:1. A double will have a low range of about 4:1. The spline count for the TH350 and TH400 versions of the NP203 are different and I think it is the TH400 version that is used for the doubler.
__________________
I can still count my vehicles on two hands.
Damien is offline   Reply With Quote
Reply

Bookmarks

Tags
transfer case, transmission

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 10:49 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
Copyright 1997-2020 67-72chevytrucks.com