77 chevy cast iron transfer case

[J Williams]

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.

[enaberif]

Uhm... NP203 or NP205? The NP203 can be doubled to the NP205 but other than that eh nothing special.

[whiskeydented]

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.

[andrewmp6]

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.

[Damien]

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.