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Used np205 price

I was not sure that was a NP-205--we had a '68 K20 at the junkyard that had a SM420 and a similar T-case,with a 307 V8,it was not a divorced Rockwell,I thought it was a Dana 20,but it didn't have the weird shifter they used on those ,so maybe it was an early NP-205 that was coupled to the transmission ?..bet if someone needed that setup,$150 would be a bargain..never see another one probably.
I've never seen a Rockwell that wasn't divorced !...
 
Richcz28 said:
Why are you looking to move to the 205?
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All I read is people shitttting on the 203. So I figured if I could swing the swap Id go for it. The guy ended up not parting out the truck. Plus it seems more trouble than its worth, or more importantly than I could afford.

So Im sticking with the 203. I have a spare 203 anyhow. Hahahah
 
i have almost the same problem .

half a 203 and a full 205 . . . wish i had just done a magnum box over this combo . but its only money at this point and i already had this setup from a parted out project .
 
I hear people say it causes extremely bad gas mileage and causes premature tire wear. I don’t see much benefit to swapping to the 205 if your 203 is part time and you’re only running a moderately built rig.

I have driven both cases but never owned one, so my opinions might not be the most informed.

Personally I prefer the smoothness of shifting the newer t-cases like a 208 or 241.

In my opinion 205s seem to be best suited to high horsepower builds where having a low gear ratio is less important.
 
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Richcz28 said:
I hear people say it causes extremely bad gas mileage and causes premature tire wear. I don’t see much benefit to swapping to the 205 if your 203 is part time and you’re only running a moderately built rig.

I have driven both cases but never owned one, so my options might not be the most informed.

Honestly, if you’re concerned about gas mileage you probably shouldn’t be driving these trucks anyway. Nb4 “but mines gets 34mpg” most do not...

Personally I prefer the smoothness of shifting the newer t-cases like a 208 or 241.

In my opinion 205s seem to be best suited to high horsepower builds where having a low gear ratio is less important.
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My truck is definitely a moderate build. I don’t envision any extensive or hardcore off roading. I dont have the time to anyway, even if I wanted. Mine is being built for moderate street use and occasional trips to the desert with the family.

My 203 is part-time anyway. Plus I have that extra 203 so if the one I have goes south, this extra one can just go right in.

I guess the biggest complaint I see, is 203 is chain driven while the 205 is gears. Since the 203 has a chain and if you convert it to part time, you need to be aware you have to enage the hubs and LOC every so often to make sure the oil circulates inside, to prevent drying out.

If Im not mistaken the 203 has a lower gear ratio doesnt it? Either way... I cant afford the 205 swap anyway and I picked up the extra 203 for $70 or so
 
TJ1978 said:
My truck is definitely a moderate build. I don’t envision any extensive or hardcore off roading. I dont have the time to anyway, even if I wanted. Mine is being built for moderate street use and occasional trips to the desert with the family.

My 203 is part-time anyway. Plus I have that extra 203 so if the one I have goes south, this extra one can just go right in.

I guess the biggest complaint I see, is 203 is chain driven while the 205 is gears. Since the 203 has a chain and if you convert it to part time, you need to be aware you have to enage the hubs and LOC every so often to make sure the oil circulates inside, to prevent drying out.

If Im not mistaken the 203 has a lower gear ratio doesnt it? Either way... I cant afford the 205 swap anyway and I picked up the extra 203 for $70 or so
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The 205 is 1.96:1
The 203 is 2.01:1
Not the biggest difference in ratio.
I had both and I would not change from one to another unless the one broke and I had the other sitting there.
I too think if you are to change, go to a np208 or np241.
And I drove my 203 with part time for 8 years, rarely put it in 4wd and never had any issues with oiling or anything with the chain.
 
Recon 78 said:
Another thing to watch for is that alot of the 205's that came behind th350's are early ones and mite have the 10 spline front output with a yoke instead of 30 spline with a flange
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Is one stronger then the other? Is there any advantage of either the yoke or flange?
 
more spline = bigger shaft = stronger as it has more meat . also more yoke / flange options .

10 spline stuff is somewhat limited to just basic options . the top of the pile is 32 spline front output and can get you almost any thing for flanges and yokes . go did NOT do 32 front tho but ford and divorced cases from dodge and I.H. vehicles did and its a basic swap in to add it . gm did do the 30 spline tho and its held up great for guys over the years . those can be spotted from the flat flange on them .
 
FWIW, the 30 spline front output and a Dana 60 pinion shaft are nearly identical in size (if I remember right, the D60 pinion is actually a tiny bit smaller). So that one's pretty good, but as mentioned, less options on yokes/flanges.

The 10 spline is small and weak, at least with big tires and hard offroad use. We mostly recommend that one for OE replacement cases on our t-case builds, if you want strength look for 30 or 32 spline front outputs.
 
I bought a 1972 case with the 10 spline and yoke. Then scored a 30 spline flange from truckoholic to swap in
Never messed with it but some guys said it's a beotch to remove the u joint straps at the case yoke
 
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