TNutcher

Well my friend has a 94 manual 4x4 turned up a little - clutch slips pretty easily. And I have my 99 auto that's built. we both got a wild hair up our a$$ the other night and bs'd about the thought of switching trannies. He would buy me a clutch and so forth so it'd come out about even for me anyway. Was wondering what all would need to be changed out. If we did it over a weekend we should be alright with having the correct hard parts to get everything lined up and driving but what about the PCM's and all the little things like the neutral start switch, reverse lights, driveshafts, cruise control and speedo working still??

TNutcher

no ideas?? common guys speculation can't hurt and if anyone has any experience, good or bad, i'd appreciate the input. thanks again
TNutcher

dguru

First the steer column comes out. Then the Slave cyl. Then peddle assy. Pull driveshaft, tranny, bell, clutch. Same for the auto but no slave. Swap that stuff. Now the electronics: The 99 has 24 valve and is electronic. You will need to make the controls to switch OD and CL (The 95 stuff will not work). This could be done with pressure switches. Pressure depends on what PR regulator pressure you want to run. They make after market kits but they don't consider people who build up a valve body for higher pressure. Ask if you don't understand what I am saying. The 99 will need to bypass the clutch switch and nutral start switch(easy just splice the wire together). BTW I think the 99 drives by wire so you may need to swap the peddles in each assy or you may need to find some 94-96 peddles for the 94.

The 94 will take the manual fine but will throw a 37 code and maybe some others due to the fact that there is no valve body connected but that should not cause a problem.

The column plugs may have some wiring differences but should be easy to work out.

To be honest it would be easier to fit a twin disc ceramic clutch in the 99 but I understand that you want the NV4500 in your wheels

tmills

Very easy to swap the auto to NV4500. Very hard to swap the NV4500 to auto. If your buddy wants an auto alot of your wiring has to come out. It would be easier for him to run a 47rh or buy a stand along transmission controller.

patdaly

Why couldn't they use the stand alone controller?

It would be much simpler than finding the correct wiring.......

tmills

Stand alone controller will work. I believe ATS has one.

TNutcher

I looked on their webiste and couldn't find the ATS Standalone controller, does anyone have a link that i could use to check it out? Thanks, that seems like it'd be the best rout for him and I could just fool my sensors or get the PCM reflashed for a manual trans maybe?? Can that be done? Thanks
TNutcher

dguru

No need to flash anything to swap auto to manual. As I said it will just throw a code 37 but will not affect running at all.

The manual to auto is where you will have to make changes. No you can't take the wire harness from a 94 and put it in a 99. 99 has 24 and the computer is different. You will have to use pressure switches to shift OD and CL. That will force a shift at specific gov. pressures. In other words it will shift at the same speeds in all conditions. Not good for towing. The best bet would be to find a wrecked 99 auto and swap everything. I think the 99 had a 48RE which is a better tranny than the 47RH.

TNutcher

You guys have it backwards, we'd be trying to put the 99 automatic 47RE (and trans. case)into the 1994 12v. The 12v's NV4500 (and trans. case) would then be put back into my 99 24v. I still can't find that standalone controller, if anyone has the link to it i"d appreciate it!
Trevor