[mrein3]

No offense to mr. devil but I went from a manual to a th350 and still say this was the best upgrade I ever made on my truck.

The driveshafts are all the same on 1971 4x4s. The adapter is different lengths depending on the transmission which was designed to make the overall length of the tranny/transfer the same.

You need a complete th350/adapter/np205. Put a new drive sleeve in the adapter while you have it on the ground (approx $90 at the dealer). Check the adapter for cracks. Get new seals for the adapter. This is what keeps the ATF in the th350 and the gear oil in the xfer.

You'll also need an auto steering column and the transmission linkage.

The speedo cable screws off of your manual np205 and on to your auto np205. No modifications necessary.

One more note. The np205 behind my 1971 manual transmission setup did NOT have the tag on it that CUSTOM/10 mentioned above. Neither did my "new" one out of a 1972 Blazer. However I have seen pictures of 205s with this tag. So don't be afraid if your transfer case does not have the tag. Just compare it to the picture above.