42RH in 68 Dart advice/request

This seems simple enough yet…

The backstory;

Two years ago, I took a 42RH from a Dakota to a shop to be rebuilt. Well, the car project got put on hold because of family issues, time, my ineptitude, and whatever else.

I finally recently get the car registered and insured and make an appointment for an alignment shop. Finally after 10 years of messing around, I drive it, and it was glorious. Everybody at the alignment shop was impressed with the car, looking at it, asking questions, etc., I was enjoying every minute of it.

I drove the 3 miles back home and started poking around and found oil all over the crossmember. I pulled the motor out and got a better pan gasket and checked to make sure the windage tray wasn’t interfering anywhere and all that.

When I was installing the engine, I noticed a trans fluid leak also, so I drained it to pull the pan and noticed the fluid seemed much darker than I would expect for 7 miles. The bottom of the pan and the filter were full of friction material.

It has a manual valve body from John Cope, so there is no throttle pressure cable and the transmission seemed to shift OK. I wasn’t perceiving any slippage, yet apparently there must have been.

Even with no mileage, it’s been two years, I expect the shop isn’t going to warrantee it, but I try to call them anyway and they are out of business. I asked for recommendations on the local Mopar club forum on Facebook and got a couple responses. One of the guys can’t be found.

I called the other guy and told him I had a 42RH from a Dakota in a 68 Dart. Instantly he tells me that can’t be done. I asked him why and he said it’s a computer control transmission. I said no, it’s a 42RH, it’s hydraulically controlled the later 42RE is the computer control model.

He then says the overdrive is electrically controlled so there isn’t a way to control that. I said this is done all the time, the overdrive just needs 12 Volts engage/disengage and a simple switch can handle that. He then says besides, the Driveshaft is too long. I said that has already been handled by simply getting a shorter drive shaft, I have driven this car… You know what, never mind, it really doesn’t sound like you’re the person that can help me.



So, now to the question;

What specialized tools are required to do a rebuild myself.
I figure if I have to explain it to a transmission guy, that I can probably handle the task. I know I’ve previously seen tutorials, I just don’t remember where, so I guess its back to Google. And I guess its one more summer of not driving it, though I’ve gotten a teaser.
Thanks in advance for any info you might share,
Rod

EDIT: I just realized you're talking about the 42, not a 46 based unit. Forget the 727 references.

There are some very good videos that cover that exact transmission. There are also some really good upgrades using factory parts from motor home 727's such as 4 pinion planetary etc. There is a guy I know on forebodies and e-bodies.org putting one behind a 6.4 3rd gen who's done some of the upgrades on his. Might be worth a look.