i need info!!!

[hjalbert]

can any one tell me what all i would need to go from my current 4wd 4 speed to an auto? could i use any tranny, or is there special 4wd autos? i figure instead of going with a column shifter for now i would use a floor shift, but i guess i would need the cross member also, but hey, anyone got any ideas???? within like 100 or 200 miles of phoenix? thanks

[Mudder]

to find a tranny and transfer case in a truck or one that someone knows that it is working alright. then maybe you cand get the crossmember and converter. youll also need the flywheel for an auto. you may have lenthen or shorten the drive shafts too. some of this stuff i cant remember. someone will fix ya up with some good info soon here LOL.

[slam33]

Ya, you need the crossmember, the trannys have no tail housing and the output shaft is shorter. I have a TH350 4x4 trans that I'm converting to 2wd. Seems that the 4wd tranny has all the extra plates in it. I know it's the hard way to go but I have the tranny and the parts to do the convertion and according to TCI it should be a real nice trans when it's done.

[mrein3]

On all trucks that the General originally built with a NP205 transfer case 1969? - 1972 ALL the driveshafts are the same length. I should say all long wheel base trucks 3-speed, 4-speed, or auto had the same length front and rear driveshafts. Same for the short wheel bases and the Blazers. The difference in the lengths of the transmissions was made up with the "adapter" between the tranny and transfer case, not the drive shafts.

They all also had the same crossmember that the adapter bolted on to. Again the General adapted the adapter to the crossmember. Instead of having Ford-like different parts for every different configuration.

I changed over from a 3-speed/NP205 to a Th350/NP205 last December. I used the original crossmember and the original driveshafts.

You'll need the tranny/adapter/transfer case, an auto steering column, the linkage from the column to the tranny, a radiator that has a cooling tank, and the cooling lines from the tranny to the radiator. Yes GM had different configurations for the input on the 205. All originally behind a manual transmission transfer cases are interchangable but they are different than the th350 and th400 ones. If you go the Th350 route buy a new drive sleeve and plan on a new adapter. Every used adapter I've ever seen has been cracked. When you get done with the swap you can sell your tranny/adapter/t-case to help recoup the cost of your new stuff.

The speedo cable output is on the transfer case. If you have something other than 3.73 rear end gears there will be a little gear box on the transfer case to make your speedo read right. Keep that from your old transfer case and bolt it on the new one.

I had to buy new exhaust because the beat up old stuff that was there wouldn't fit around the turbo 350. For that I bought the LMC dual exhaust kit in their catalog.

I also had a different starter so that is new.

I used the flywheel off of a 1971 Monte Carlo that originally had a 350/th350.

I had the tranny shop sell me a new torque converter when I had the tranny rebuilt. You may as well have it rebuilt while it is sitting on the ground verses putting it all together only to find out the tranny needs a rebuild.

Since you live in Phoenix you'll probably want to put on an external tranny cooler in addition to the one in your radiator.

After my first full season of pulling my boat around behind the auto instead of the manual I can't believe I didn't make the switch sooner.

If your truck doesn't have a NP205 then never mind what I said.