Last post on Nov 28, 2013 at 5:35 AM
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Dodge Ram Pickup 1500, Dodge Ram Pickup 2500, Dodge Ram Pickup 3500, Transmission, Truck
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#916 of 2056 Re: 2001 Ram 2500 trans problem [allan18]
Mar 15, 2009 (4:58 am)
Without knowing which engine you have I can't determine which transmission you've got. But in general there is a good possibility the symptoms are the result of relatively non-evasive things.
*Low fluid level
*Low hyraulic pressure: transmission filter, cooling lines, or anti-drain back valve clogged.
*Throttle linkage dirty, sticking, or binding.
*Transmission Throttle Valve cable binding or sticking; misadjusted. Throttle Valve Lever sticking.
*Electronic governor circuit malfunction. Defective Governor Pressure Sensor or Solenoid.
*Dirty transmission valve body, sticking valves or worn plunger bores.
*Loose front band or out-of-adjustment.
Mar 15, 2009 (6:42 am)
I'm a chrysler technician in winnipeg canada with 20 years experience. I own a
2001 ram quad cab 4x4 with a factory off road package, 5.9 liter v8 and a 46re
transmission. Recently while drive on the highway the truck would not lock up in
overdrive and fault code p0740 tcc solinoid circut would become active. The trans
pan was removed, no debree found in the pan. the 3/4 and lock up solinoids were
tested and working fine. There is a boost pressure plate in the valve body that
requires a larger bleed hole to be installed. The boost pressure plate was replaced and valve body reinstalled in trans. While road testing on highway same fault
occured. Brought truck back in shop, with scan tool attempted a lock up stall test.
The torque convertor would not lock. Inputs from tcm to lock up solinoid were tested, all inputs were ok. At this point transmission was removed, when disassembled, rear bearing support was damaged, overdrive clutches and steels
were burnt, overdrive planatary and intermediate shaft were also damaged.
i completly overhauled the trans with new torque converotr and pump also installed.
Inside the trans cooler lines is a one way valve to prevent torque convertor bleed back, the one way valve was removed because of a possible restriction. Reinstalled the trans and reroad tested. On the highway same fault occurred,
when returning to the shop the trans temp light came on and overdrive was disabled
I pulled over and waited for it to cool down. After restarting and driving when the
trans shifted from first to second the rear wheels locked up solid, two clutches applying at the same time. At this point it had to be towed back. I reremoved and disassembled the valve body, no probelem found, all valves were working properly.
Tans was the removed again and disassembled, the exact same damage was found
in the overdrive unit. The rear bearing support is fed fluid directly from the return side of the trans cooler. I hooked up a trans coolker flush machine with a pressure gauge and checked flow pressure, pressure was 45 psi, it should be no more than 15 psi. Anyway long story short a restriction was isolated to the radiator cooler, not the auxillary cooler. The radiator was flushed, aux cooler flushed, all rubber
portins of cooler hoses replaced, Trans was reinstalled and is now working fine.
please check for a restirction before doing any repair on your trans. remove the
one way valve in the cooler hose, and disconnect your return cooler hose from the
trans(rear one) runyour engine in neutral at 2000rpm and check you trans flow,
you should get a gallon in about 20 seconds, basically drain the pan. If the flow is a good amount less then you probably have a restiction. The pumps and valve bodys in these trans are solid and the issue is usually some place else. I found out he hard way, rebuit trans twice in the same week.
#918 of 2056 Re: 1998 dodge ram trans problem [gfd439]
Mar 15, 2009 (7:01 am)
replace your boost pressure plate in the valve body with chrysler part number
04617015, it has a larger bleed hole and prevents you lock up convertor from
kicking in and out.
#919 of 2056 Re: Transmission Question for 2001 Dodge Ram 2500 [etek]
Mar 15, 2009 (8:05 am)
Just wondering if the govenor pressure sensor and transducer fixed your pickup? Mine is still shifting fine!
#920 of 2056 Re: 46re problems [robert0528]
Mar 15, 2009 (9:57 am)
Robert, great post!!
Your unfortunate story reinforces the need for routine maintenance. Industry statistics clearly show a correlation between the level of maintence and the level of transmission problems. Yet, the vast majority of us will religiously change engine oil at 3000-5000 miles, yet completely forget about the transmission. In the vast majority of cases that I see or hear of, lack of routine maintenance is usually associated with transmission problems.
As noted in many of my posts, poor fluid flow or loss of hyraulic pressure due to debris problems are predominate to many transmission issues. That's why I often list clogged cooling lines and the anti-drain back valve as a prime suspect on Mopars.
The one thing I might suggest to reconsider is the permanent remove of the anti-drain back valve. This valve was added to later A998s, A999s, A500s, A518s and A618s for a reason. Torque converter syphoning can be a problem on these transmissions, especially if one lives in a climate where day-to-night temperatures range considerably. The anti-drain back valve prevents this. If the filter is replaced and the ATF is refreshed routinely, the likihood of having excessive dirt and debris in the ATF is very low. They can be replaced very easily and should be periodically as well.
Chrysler has the anti-drain back valve built directly in to the transmission of the RFE series, and uses a Cooling Return Filter to ensure that the anti-drain back valve doesn't get clogged. However, the filter itself can become clogged and produce the same problem as a clogged anti-drain back valve.
ATF does become oxidized, collects moisture and dissipates the friction component over time. Fluid condition is probably the single most important characteristic of an automatic transmission. This is especially true on Mopars since their ATF+ series is a very specific and unique recipe.
#921 of 2056 2005 Dodge Ram 1500 Transmission Problem
Mar 09, 2009 (11:28 am)
#922 of 2056 2005 Dodge Ram 1500 Transmission Problem
Mar 09, 2009 (11:28 am)
I have a question regarding my 2005 Dodge Ram 1500... I'm having transmission problems... My vehicle has just under 50000 miles and when its cold it won't ingage into reverse for several seconds... I took it to Dodge they said filter was pluged have since replaced filter and fluids... It seemed to correct the problem initialy... After 500 miles I am seeing the same problems with the transmission...
#923 of 2056 Re: shifting problem 1996 Ram 1500 [dustyk]
Mar 15, 2009 (5:17 pm)
Sorry for the delay in replying, It is a '96 1500 4x4 with the 318 engine and about 142,000 miles. It seems pretty solid, no slipping that I can tell. I can't find the transmission numbers although I'm told it is '96 only. It seems to pull better since the fluid change than before and will occasionally shift. At times, I think it is in 2nd when I take off because I don't feel it shift up, but it will downshift manually into 1st. I have only had the truck for a couple of months and was told the transmission was recently rebuilt. I could tell the pan was off recently and the flywheel looks new as well. I tried to get codes by turning the key on and off three times, but all it shows is 12 which, I'm told, means the codes have been erased. Any advice would be greatly appreciated because I am at a loss when it comes to transmissions. Thanks.
#924 of 2056 Re: shifting problem 1996 Ram 1500 [96ram15004x4]
Mar 16, 2009 (5:38 am)
I also forgot to include that yes I do have reverse. Sorry about that.
#925 of 2056 trans confusion
Mar 16, 2009 (10:35 am)
Thanks for the help,I got a used tranny for 1600 bucks. I;m gonna rebuild the broken one and have a spare. I do thank you, have a good day.