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Anybody running one of these shift boxes on the road. Says for off road use only but... Been having issues with my trans, 92 e4od diesel 4x4. Which I'm sure is electrical as some times it works perfect. Next day it won't.
Thinking one of these would bypass all the factory controls/sensors and allow me to control the trans the way I want. Drove semi for years figure this won't be an issue. 300 bucks and my truck back on the road sounds great to me.
i would imagine you still need the factory trans computer to make that unit work.
with that said, i would inspect ALL plugs going into the trans for good connections and no frayed wires and save yourself $300
You just need to properly diagnose your trans wiring and sensors or have someone who knows how do it for you. You can't simply bypass a fail solenoid or wiring problem.
Been through the wiring couple times, plug also. Trans shop here laughed at me. Said we threw all the testing equipment away long time ago. "Nobody fixes that old **** anymore. Not worth the time or money". So I'm on my own. Rural WI so the options are very limited. Went through the wiring when I put the new cab on and painted the frame etc.
Figure the switch set up would bypass the factory computer. Allowing me to put the trans into the gear I want and not rely on sensors or the computer. Gets wired directly to the solenoids I believe. Not sure if that's how it works. Why I'm asking. May try a new or reman PCM this spring. Checked throttle position sensor and adjusted. New speed sensor in rear end. Solenoid pack replaced while back.
Truck is in storage for the WI winter. Not getting salt on my rust free baby. Sure would be nice to be able to drive and depend on it this spring. Not my daily driver, but is my fishing boat hauler. Last resort 5 speed.
This is old but I fixed the truck today, I hope. Was just about to start the ZF5 swap. Was digging through my parts rack and came across a PCM from a 93 E-350 7.3l I scrapped. This was a few years ago and had forgot I even had it. A quick swap with the old PCM and it's running and shifting like never before. An hour of work verses hours and hours checking and testing wiring, plugs, etc.
My advice would be start with the pcm. Easiest thing to try unless something is clearly damaged. Will be getting another as a spare while I can.
Also the new one was a F4 part number, 1994 I believe. Should have written it down but didn't. Which may have been an upgrade at some point to the van being a 93.
Few more test drives before I trust it. YIPPPEEE..
Well, that's a pricier part to change and uncommon to fail, so generally that's the last place to suspect after testing the rest of it, but if a guy has a spare laying around, sure, why not.
If it's a '94 unit, it probably shifts better than it did when it rolled off the assembly line.
It's tricky when they fail because there's no sensor or code to tell you, that the shift computer itself is faulty.
The good thing about throwing a '94 teca at it though in hopes, is at least you get a good upgrade even if it doesn't fix a guys current issue, so there's no loosing in the end I suppose anyway.
Both of my trucks have reman '94 units. Wouldn't change a thing about their shift scheduling. I can tell you, before each of them failed over the years, the '93 units were not bad either. They improved them throughout the years. Not sure where the big jump was, where you'd really feel the difference/upgrade. Likely not much further back.
Last edited by FORDF250HDXLT; Mar 30, 2026 at 08:31 AM.
