Of course, nothing’s certain it’s still something of a shot in the dark to replace the TCM, but the odds are looking better. So there’s a good chance the TCM is at fault. The transmission goes in failsafe, but it doesn’t set any codes. So you disconnect the transmission, start the engine, and put the trans in gear. He went on to explain that he’s seen several bad TCMs causing the transmission to lock up while driving. If not, there’s a good chance the TCM is toast. This should set codes for all of the solenoids. So his suggestion was to induce a code by starting the engine and then unplugging the transmission harness connector. “With those problems you should have ratio codes.” “There’s your first red flag,” he replies. The first thing the HotLine tech asks was whether you have any codes. You explain what happened and what you’ve done. This is when you put in a call to the ATRA HotLine. After spending a couple days testing the electrical system and going back through the unit, you’re still in the same predicament. You’d expect a wiring problem to set a code, but, with the trans out of the way, you decide to check the harness from the TCM to the trans. Could this problem be caused by a solenoid not functioning properly? They were all replaced during the rebuild. You tear it down again only to find everything looks good. So you put the truck on the lift and pull the trans back out. Now what? Must be a mechanical component, like the low/reverse one-way clutch or the overdrive one-way clutch is locked on. You get your scan tool to check for codes.Īnd guess what? No codes. Driving very slowly, you make your way back to the shop. Not seeing anything, you get back in, start it up, put it into gear, and it moves forward. Then out of nowhere the rear tires lock and you almost go through the windshield! You skid to the side of the road, put the trans into park, get out and look under the truck. The last part of the test drive you take it up to highway speed to check lock-up. It shifts perfectly: a nice satisfying feeling. You’ve built hundreds successfully now you have this one problem child.Īfter rebuilding the transmission, you take the truck out for a road test. You know the problem areas, you know this unit like the back of your hand. You’ve been building these units now for over 13 years. To protect your rebuild, always install an in line filter kit. Any debris left in this system can and will find its way back into the transmission and into the super sensitive solenoids. The quick repair for this is an oversized manual valve.įinally, you’ve seen what happens to the pump when the cooling system isn’t serviced correctly: The transmission fluid cooling system is one of the most critical areas in the transmission repair process. The increased tension and extra stiffness help keep the ring seated securely in the case groove.Īnother common problem is delayed engagement in drive and reverse caused by a worn manual valve. Once again the aftermarket came to rescue with a wider and slightly thicker snap ring, providing more outward tension. The next common failure in the Ford5R110W occurs when the low/reverse retaining ring pops out of the case groove, causing slips in reverse and severe damage to the case lugs. With no shift valves, all shifts are controlled directly through the shift solenoids, and you’ve no doubt learned the importance of testing or replacing them. The aftermarket quickly came out with a plug kit to correct that. The rubber boot on the back of the pressure switch would rupture, causing a pressure loss. These pressure switches were one of the first problems with the Torqshift. In this application, the switch is only used as a plug the remaining four holes were cast over. The later solenoid body may have one pressure switch with no wire going to it. The computer on these vehicles was never programmed to monitor the pressure switches. The original solenoid body may have one or five pressure switches, depending on model year. The Ford Torqshift came out in 2003 and over the years has exhibited its share of problems.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |