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If the temp sensor is by the thermostat, then what is the sensor on the hard coolant line that runs up and down in front of the block?

Does anyone have any idea what the square boxes are wired in before the tranny cooler fans?

Truck is back up and running. Thanks to nv555 for the TCM.

There was water in the tcm and the key pad. Dealer said there was corrosion as well. I suspect water entered the keypad first. The keypad was weathered. Figured it sat with a window down before we got it.

Both. Can I upgrade to the wtec3 for less? Or reman tcm?

Problem was the tcm and keypad had water in them. We need a new one. Looking at prices on eBay for a wtec2, they look higher than the wtec3. Any advise on which way to go? Still waiting on dealer price.

I have. I’ll let y’all know what they find. Thanks

Wtec 2

Is the diagnostics port for the transmission to the right of the collum under dash? Grey rectangular port.

Ok thanks. I pulled the trouble shooting guide for that one and the speed sensor. I’m going to check resistance on these and see. It’s going to the dealer this week anyway, but need to be able to drive it if possible.

So what drives the speedo gauge? The trans speed output sensor?

So I put a few things together. The truck stop engine light has been coming on intermittently. I thought it was running a little warm. At 200 the light would come on. It would never get above 210 as it would drop down when the fan would come on. I changed the thermostat to be safe. Now I’m...

Here are a couple pic of our tanker before it was finished. She came to us as a tractor 1088.

I’ll check those things out. Thank you. It’s a brand new problem.

Thanks for the replies. I got codes from the tranny d1 tranny oil to high and d2 tranny oil sensor failed to high. Can one check the speed sensor for resistance to see if it’s bad?

Thank you Thanks I check it out

Pull the codes? The truck does not default to 1st. It goes into 2nd when put into drive. I can shift down to 1st and back to 2nd. How do I pull the codes?

Also changed the thermostat today.

Our 1088 tanker will not shift above second. Can’t shift manually with the buttons either. Mph gauge is not working. It jumps when I put it in reverse. Everything has worked until now. Only work I have done lately is delete the trailer brake valves in the cab and charged two batteries yesterday...

Delete please