NP203 Rebuild At Home

[Flying 77 Jimmy]

I started looking into this because I cannot find the H and L positions. And because I have read that the case be the cause of drivetrain clunk. hi Loc and lo loc work fine. I have manual hubs and TH350 trans. I've trouble shot this with hubs locked and unlocked. The case whines and groans when in what should be H or L ( hubs locked and unlocked). Is this something I can rebuild at home? What tools are needed? I don't plan to swap to a NP 205, I'm happy w the current case I just want it to work properly. I'm running 33's mostly a street truck. Thanks for the help.

 

[blazinzuk]

Tried adjusting the shifter. They are awesome when working. Which is almost never

If you have even a slight mechanical aptitude, its something you can do at home

 

[Flying 77 Jimmy]

What is there to adjust? I have not looked yet, I'm
Surprised to hear there is actually an adjustment for that.

 

[blazinzuk]

Its actually a really weird shifter. Been years since I looked at one but the shifter can get gummed up and not work properly best to remove it clean and great it. Pretty sure there are a couple threads on it

 

[mac907]

Or if you have $185 to spend check out the ORD twin stick for the 203. It'll let you control the lock/unlock with one lever and the hi/neutral/lo with a separate lever:

 

[mac907]

Much simpler than the factory single lever box that makes one lever perform two separate functions:

 

[BlazerFarm]

Can you still get rebuild kits for the 203? They used to be all over the place. The chain and probably the sprockets in mine are fairly shredded I think. I'm not even sure that sprockets came in the kits. Mine may be too far gone. The chain stretched and as a dumb kid about 30 years ago I'd still four wheel it. I can still hear the bang-bang-bang of the chain skipping over the teeth. Ugh.

 

[Flying 77 Jimmy]

I like the twin stick idea. Can it be installed without removing the case? It probably doesn't matter because I think I'll be removing it anyway.

 

[SIK5]

 

[mac907]

Just unbolt your transmission hump and you should be able to install with t-case attached.