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Pickups Dodge Ram Dodge Ram Transmission Problems
1286 messages, Last post on Dec 06, 2009 at 8:37 PM
You are in the Dodge Ram Forum. Your Host is kcram
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Replying to: nascarnut3 (Dec 06, 2006 5:51 pm) |
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This post is intended to address the most recent concerns regarding the 46RE. One of the biggest problems encountered is an unknowlegable person trying to diagnose various issues on the 46RE. More often that not shift problems are related to relatively easy items to repair. First, understand that the 46RE is an electronically controlled, hydraulically actuated transmission. There are a number of things that can affect a no 3-4 shift: *Assuming that the OD Switch on the stalk is off, the switch could be defected causing the OD circuit to be defeatured. This does happen! *Overdrive circuit fuse is open. *The overdrive switch circuit either open or shorted. Check the connectors at the transmission for corroded terminals. This is very common on older RAMs. *Incorrect outputs from the Distance or Coolant Sensors. A punky Distance Sensor can caused a weird collection of symptoms, including no 3-4 shift. Also, remember that the 46RE will not shift in to fourth gear until the transmission fluid reaches a certain temperature. If the coolant temperature sensor is bad you will not get a 3-4 shift. If this problem is recent to the winter weather, this should be a prime suspect. *Incorrect output or intermittent output from the Throttle Position Sensor. On Dodge trucks the Throttle Position Sensor can cause all kinds of problems. Maybe even global warming! *The Neutral Sense circuit to the PCM is open or shorted. *The Overdrive Solenoid either shorted, open, or weak. On older 46REs the solenoid plungers became partially magnetized over time causing inoperation. *The Overdrive Solenoid feed orfice is clogged in the valve body. A very common problem on vehicles that DID NOT receive a reqular transmission filter and fluid maintence. *Low hydraulic pressure. This can be caused by a number of things, too. But before you suspect the pump I'll bet that the Anti-Drain Back valve in the transmission line is clogged. Some shops clean them, but I would recommend replacing it and changing out the fluid. *Failed Overdrive Clutch. Unfortunately, this is somewhat common in earlier years, especially vehicles that towed heavy loads or were used in hilly country with the vehilce in overdrive. *Failure of the Overdrive Piston Seal. Usually not a problem unless very high mileage or Dexron-Mercon fluid was used. *Clogged Overdrive Check Valve. The result of dirty transmission fluid. *If this transmission has been "overhauled" or "rebuilt" by an independent and they DID NOT use a Mopar transmission overhaul kit, it is very possible that Overdrive Piston has the incorrect spacer installed. *PCM failure (the least likely). Hope this helps. Regards, Dusty PS Always use the Chrysler specified ATF. For pre-2000 vehicles, ATF+3 is okay. For 2000 and and later, ATF+4 must be used. NEVER USE DEXRON-MERCON FLUID IN A DODGE TRUCK TRANSMISSION. |
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Replying to: dustyk (Feb 11, 2007 6:32 am) Thanks
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Replying to: nascarnut3 (Feb 12, 2007 9:08 am) If so, it sounds like the Throttle Valve Cable (Modulator Cable) is out of adjustment, the Throttle Valve Return Spring at the transmissionis is broken or missing, or the Throttle Valve Lever at the transmission is binding. Regards, Dusty |
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Replying to: unknown (Dec 27, 2006 5:22 pm) |
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Replying to: dustyk (Feb 11, 2007 6:32 am) |
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everything works fine at start up, once the tranny reaches operating temp the O/D light comes on and a few minutes later the trans temp light comes on. When it first started, they would eventually go out and everything was fine. Now they stay on.
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Replying to: geobubba (Feb 13, 2007 7:08 pm) It would be beneficial to know the history of this vehicle, but my first suspect would be a clogged anti-drain back valve. When partially clogged, fluid flow to the transmission is greatly reduced. You should try to determine if the fluid is really over heated. If the ATF smells hot and measures over 240 degrees F, then there's a problem. If not, it could mean the transmission fluid temperature sensor is defective. Regards, Dusty
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2001 Dodge Ram 1500 Quad Cab 5.9l 4x4. when running cold and shifted in reverse the engine stalls out. after running for appox 15 minutes reverse works fine. The only way I've found to prevent engine from stalling is to keep foot on gas to keep rpm's up but as soon as I take foot off gas it will stall unless I shift into neutral. Does anyone have any ideas on what's going on?
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Replying to: dpstroup (Feb 18, 2007 10:41 am) Regards, Dusty
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