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Ferg1 · 06-02-2023, 11:49 AM

Hello all
So in process of selling my 2007 tiffin the tcm decided to go out. Yes the TCM. And im sure u all know there isnt any out there at all thanks to covid. So i have an excellent coach with under 20000 miles that is basically dead. So at this point im willing to cut my losses. Any suggestions appreciated.
Ive called everyone that would show up on google search. Salvage /allsion/workhorse/ultra rv /transmission instruments/ etc......

krivanj · 06-02-2023, 12:50 PM

https://rvchassisparts.visonerv.com/...ecm-ecu-tcm.pl

They have several.

Ferg1 · 06-02-2023, 01:01 PM

Yep called them
Not one for me
Thanks though

Ilvmygt · 06-02-2023, 04:58 PM

If the TCM is the Transmission Control Module, Transmission Instrument can rebuilt the module to restore it. Friends of our had there TCM rebuilt and were very happy with the work and the knowledge of the company.

https://www.transmissioninstruments.com/

972-353-8286

Ferg1 · 06-02-2023, 06:19 PM

Yeah called transmission instruments.
He told me he can only rebuild the allison touchpads
Mine is on the column
There has to be someone out there that can rebuild this?

RichKimball · 06-03-2023, 09:20 AM

I have a note that this guy was a huge help to someone needing a TCM.

He is worth a call I suppose. Good luck.

Dwight and Peggy Flory at North Little Rock Diesel.*

(501) 945-2557‬

408 Lake Lane
North Little Rock AR 72117

Jim_HiTek · 06-03-2023, 10:12 AM

I'm curious...how do you know it's definitely the TCM and not a corroded connection? Wondering if you pulled the connectors apart, especially the one on the tranni, and inspected and cleaned as needed?

Ferg1 · 06-03-2023, 01:59 PM

It is the tcm. We have inspected every single wire every pigtail and did voltage and ohms test and according to the specs it did not pass the test.

Jim_HiTek · 06-03-2023, 02:10 PM

Okay, then maybe contact one of the 3,000 or so RV salvage yards and see if you can find one there.

Cougarkid · 06-03-2023, 02:27 PM

I had a similar issue with my 98 Overland. 8.3L cummins, Allison 6-spd. Cats-eye error, no shift, dead where it sat.
Did all the tests, made the calls, replaced the TCM with a borrowed spare, almost gave up.
Although all the wires passed the tests, I ran new power and ground wires from the battery directly to the VIM, which powers the TCM. Spliced them in directly at the VIM.

All the issue I was having disappeared.

Worth a try on yours.