SLOW shifting trans
Rookie
Joined: Aug 2005
Posts: 52
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From:
RE: SLOW shifting trans
if you guys have bypassed the factory cooler, the trans will also not heat up to proper temp, the cooler in rad. is for warming up the trans fluid in the winter as well as cooling in the summer. this can cause the fluid to never heat up enough to remove condisation.
Veteran
Joined: Jun 2005
Posts: 458
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From: Mid Missouri
RE: SLOW shifting trans
ORIGINAL: Socha_62
Found it. TSB OE # 21-06-97.
96-98 Ram Trucks w/Gas engines.
SYMTOM/CONDITION
"At ambient teperatires of -20 C (-5 F) or below, the PCM will electronically inhibit the transmission from shifting into overdrive. This will pretect the transmission from damage if the transmission fluid begins to freeze. In extreme cold climatic regions, this feature can cause customer dissastisfation due to elimination of overdrive and less than optimal fuel economy."
DIAGNOSIS
"The cold weather by-pass kit along with disabling the inhibator feature should olly be incorporated for vehicles used in areas of extended cold ambient tempatures."
Mine does it when its higher then -5 though. I'd say sitting over night at 10 degrees or so, maybe even a bit higher it does it.
Found it. TSB OE # 21-06-97.
96-98 Ram Trucks w/Gas engines.
SYMTOM/CONDITION
"At ambient teperatires of -20 C (-5 F) or below, the PCM will electronically inhibit the transmission from shifting into overdrive. This will pretect the transmission from damage if the transmission fluid begins to freeze. In extreme cold climatic regions, this feature can cause customer dissastisfation due to elimination of overdrive and less than optimal fuel economy."
DIAGNOSIS
"The cold weather by-pass kit along with disabling the inhibator feature should olly be incorporated for vehicles used in areas of extended cold ambient tempatures."
Mine does it when its higher then -5 though. I'd say sitting over night at 10 degrees or so, maybe even a bit higher it does it.
That sounds like the same problem mine has. So looks like it is not a major issue then other then annoying, it doesnt slip or act funny, just will not shift into overdrive till it is ready when it is 20 or below outside and it sits overnight. Tried leaving overdrive off then switching it on while driving and tried letting off the gas then hiting it again, doesnt mater. Takes about 2 miles then will shift normally, but if the outside temp is any warmer I dont have any issues with it at all.
