This info isn't really too usefull for most our Broncos, fortunately there is more support for Ford stuff than Dodge stuff. Optishift & now EFI Guy's solutions for the 4R70W controls make this easy. But I know you guys are doing some

stuff with cars and trucks and someone might be able to use this info. It took me a couple weeks of digging, but I think I found something very cool
I've been on Dodge forums a lot, and on the phone with EFI Guy more than once, trying to figure how to control my 99 Dodge 46RE trans. I was starting to think I would just give up and abandon this trans and get another. There is an older, hydraulic controlled trans that would have been a lot easier to do.
I've come up with 3 options.
First, I could use the Dodge PCM. This would require recreating a TPS, engine RPM, and VSS signal. The stock flex plate RPM trigger was not going to work easily due to the design of the 331 block & how the trans adapts to the block. I'd also have to buy a tuner and flash the PCM to ignore the missing signals from the missing motor, to avoid a "limp mode" reaction. Possibly/probably doable, but lots of time & probably lots of money to do it.
Second, Mega Squirt has some DIY computer boards that can be built to run transmissions. They are 100% DIY to build and 100% DIY to program. They have a forum dedicated to the product, but no one has posted up about a 46RE. I did some reading there, and quickly realized it wasn't the product for me.
Last night, I stumbled upon a stand-alone transmission controller made by PCS, it is highly adaptable and programmable. It only needs a TPS signal and a VSS signal. I might be able to retro fit the Dodge TPS to my carb, or they offer a carb TPS. I'm hoping I can use the sensor in the Explorer rear axle I have, as a VSS signal. You can use lots of other sensors if you like, and program the sensor ranges, transmission & rear end gear ratios, tire size, etc. It can even control an AWD t-case or use steering wheel buttons as controller inputs. It is capable of controlling many of the newest transmissions on the market with or without the stock ECUs. In short it will do much more than I'll ever need. Its not cheap, but I think the time it saves me trying to recreate the signals to the Dodge PCM will be worth it.
The company makes other controllers & products for lots of transmissions.
http://www.powertraincontrolsolutions.com/Here is a link to the web site where I found the controller. They have a great reputation on the Dodge forums for building bulletproof transmissions. They have lots of info & parts for lots of different tranmissions. The site is not set up well, I was on it 100x before I found the controller.
http://www.transmissioncenter.net/Now I think I can commit to using the trans I have. It might be short sighted, but I'm glad I can. I didn't really want to try to find another, and try to sell this one. And with the PCS controller, the electronic control & programming will be nice to have over the hydraulic models. I will call the controller & adapter guys next week and confirm what I'm thinking. If I'm right I'll order the adapter stuff and can get started. Adapting the trans to the block involves cutting the bellhousing off the transmission, and the parts aren't cheap. So I didn't want to move forward if I wasn't sure.
I think my first steps with the project will be to mount the motor, trans, and rear end. Then figure the steering linkage. I'll be using an early 90's Cavalier rack & pinion & Explorer front brake rotors & calipers.
I'm glad I've had time to read & learn about these cars. I had no knowledge about how to do this when I bought the car, more than a year ago. I feel like I've got a much better vision of how this will progress than I did 18 months ago.

"America is at that awkward stage. It's too late to work within the system, but too early to shoot the bastards." – Claire Wolfe
74-AWB 98", ZF5, Atlas4, TGW HP1060 and HP1014 axles, ARBs, 37's, 3.5" lift-5.5" front coil springs, Tahoe rear springs, EFI 302, h-boost, York OBA, 4x4x2, custom dash & gauges
72 U15- Explorer Sport-Candyapple Red (1 of 141)