jeffw Posted August 11, 2018 Report Share Posted August 11, 2018 We have a 2007 780 (D12) with a 10-speed Eaton Fuller Ultrashift rto-16910b-dm3 On the way to the race track today, the splitter would sometimes not work, and the transmission wouldn't be able to switch ranges. The gear display would alternate between showing F and a gear. For a while it was stuck in low rage, when meant 20MPH top speed. I pulled to the breakdown lane and checked the diag display which showed: Splitter High actuator (VAHS) Electrical fault inactive (7 events) MID 130 SID 35 FMI 5 Splitter High actuator (VAHS) Mechanical fault active MID 130 SID 35 FMI 7 I also retrieved the fault codes from the transmission (2 or 4 key turns) and got 41 and 43 I drove for a bit in the breakdown lane at 20MPH and eventually it shifted from 5th to 7th and I was able to limp it to the track. The track folks called a local shop they use and they're going to come look tomorrow. I've got a video of the problem at: https://www.dropbox.com/s/69s0l1ujmz25cvj/ultrashift fail.MOV?dl=0 Any ideas what it could be? 2007 Volvo 780 Volvo D12D, 465hp, 1650 ft/lbs tq., ultrashift Link to comment Share on other sites More sharing options...
DesertMiner Posted August 11, 2018 Report Share Posted August 11, 2018 Wiring harness is a “known” issue with the earlier models. X-Y shifter? Road speed sensor on tranny and one on the truck. Check your fuses at the battery location. Low voltages? http://www.roadranger.com/ecm/idcplg?IdcService=GET_FILE&allowInterrupt=1&RevisionSelectionMethod=LatestReleased&Rendition=Primary&dDocName=RR_TRTS-0930 Link to comment Share on other sites More sharing options...
sclord2002 Posted August 11, 2018 Report Share Posted August 11, 2018 I had to replace the wiring harness on my Ultrashift for failing to go to high range. Charlie Don't ever tell a soldier that he doesn't understand the cost of war. Link to comment Share on other sites More sharing options...
jeffw Posted August 17, 2018 Author Report Share Posted August 17, 2018 The mechanic called today and said it was the transmission control unit. 😞 $1300 for parts. 2007 Volvo 780 Volvo D12D, 465hp, 1650 ft/lbs tq., ultrashift Link to comment Share on other sites More sharing options...
Parrformance Posted August 17, 2018 Report Share Posted August 17, 2018 https://truckpartsinventory.com/transmission-ecms-eaton-fuller-parts?f-truck_make=Volvo&rt=nf Used one for $700 2006 Volvo VNL 780, " Arvey" Volvo D12, 465hp, 1650 ft/lbs tq., ultrashift 2003 Jeep Wrangler Rubicon 2010 Forest River Coachman Freedom Express 280RLS Jackalopee Link to comment Share on other sites More sharing options...
Parrformance Posted August 17, 2018 Report Share Posted August 17, 2018 A lot of chatter on the interwebs about corrosion in connectors causing these intermittent shifting problems . 2006 Volvo VNL 780, " Arvey" Volvo D12, 465hp, 1650 ft/lbs tq., ultrashift 2003 Jeep Wrangler Rubicon 2010 Forest River Coachman Freedom Express 280RLS Jackalopee Link to comment Share on other sites More sharing options...
HERO Maker Posted August 17, 2018 Report Share Posted August 17, 2018 Has Volvo, or other mechanic shops, taken on the concept of the "Lube and Tune" auto shops that don't make money doing oil changes, and up sale every customer they can, or create an "issue" so that their bonus amounts can be larger than their hourly wage. Plus it makes a whole lot of extra for the shop? It's time for a dirty, down and under investigation of these guys. I think that the midsize, and small trucking companies would be interested and it would shut down some of these practices of throwing parts and labor fees at everything. Rocky & Sheri Rhoades '01 Volvo 770 2016 DRV Mobile Suites, HoustonHERO Makers Ministry Link to comment Share on other sites More sharing options...
rickeieio Posted August 17, 2018 Report Share Posted August 17, 2018 We went through a similar thing a while back. We had our truck into a Cummins shop to sort out a rough running issue. We'd tried to get it fixed in Anchorage, but got hosed by incompetent mechanics, and a service writers who were less than forthcoming. Another forum member suggested we take it to the shop where he was based, and he'd peek in occasionally. So, when we dropped off the truck, the shop foreman told me he heard a random miss at idle, and he'd wager it was sucking air at the FSMP (Fuel System Management Plate). Long story, short, they ran up a near $7k labor charge by following the "diagnostic tree", per company policy, only to find it was indeed the FSMP. Forum buddy got a bunch of the labor knocked down, but it was still costly. Another case of "Technicians" not knowing what the seasoned "Mechanic" had learned, the hard way. KW T-680, POPEMOBILE Newmar X-Aire, VATICAN Lots of old motorcycles, Moto Guzzi Griso and Spyder F3 currently in the front row Young enough to play in the dirt as a retired farmer. contact me at rickeieio1@comcast.net Link to comment Share on other sites More sharing options...
noteven Posted August 17, 2018 Report Share Posted August 17, 2018 I just listened to a Kevin Rutherford podcast where he and the guests from Pittsburgh Power talked about the lost art of diagnosing prior to taking a machine apart. "Are we there yet?" asked no motorcycle rider, ever. Link to comment Share on other sites More sharing options...
jeffw Posted August 20, 2018 Author Report Share Posted August 20, 2018 Interesting data points. The actual problem on our truck was the Range Valve. Swapped that and it was solid for the drive on Saturday. 2007 Volvo 780 Volvo D12D, 465hp, 1650 ft/lbs tq., ultrashift Link to comment Share on other sites More sharing options...
DesertMiner Posted August 20, 2018 Report Share Posted August 20, 2018 Interesting turn of events.... TCU to Range valve for the fix. What made them decide it was the Range Valve vrs the TCU? Maybe the fault codes? Better for the pocket book! Link to comment Share on other sites More sharing options...
jeffw Posted August 20, 2018 Author Report Share Posted August 20, 2018 It was still failing after the TCU was replaced. They had cleaned the range valve and replaced the O-rings in it, but not replaced it. I insisted and it solved the problem. 2007 Volvo 780 Volvo D12D, 465hp, 1650 ft/lbs tq., ultrashift Link to comment Share on other sites More sharing options...
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