od light flashing
Senior User
Joined: Sep 2007
Posts: 195
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From: Redwood Valley, CA
My understanding is that when the OD light flashes the tranny is not operating properly and that is its version of a warning light. I am not sure if the changes in its shifting is the tranny going into a limp mode since its throwing a trouble code or if there is something else going on. I am sure somebody will add there opinion soon and give you some more info.
Postmaster
Joined: Feb 2004
Posts: 3,266
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From: Levittown
Originally Posted by 2 stroke man
shifts change cause transmission slips, ect and and your computer tells it to up the line pressure in order to try to compensate. raised line pressure makes "hard" shifts.
right bill?
right bill?
But yes in limp it will raise the EPC as a saftey.
Bill
Post Fiend
Joined: Oct 2003
Posts: 5,903
Likes: 1
From: MICHIGAN
Originally Posted by 95STROKER29
what makes the od light flash and tranny changes shift patterns,e4odor 4r100
Remove the sensor, clean the fuzzy crap off it, re-install, check the wiring too for corrosion ect, reset the PCM by pulling #22 & #9 fuse under the hood & turn key to run, then off. Replace the fuses, see if the trouble goes away. If not, get the codes and post them here.
Postmaster
Joined: Feb 2004
Posts: 3,266
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From: Levittown
Originally Posted by Cuda_jim
90% of the time it's the Rear Antilock Brake Sensor (RABS) on top/center of the rear axle that causes this to happen. It feeds a digital signal to the Programmable Speedometer/Odometer Module (PSOM) that tells the PCM when to shift the trans. No signal or erratic signal puts the tranny into Limp-in-Mode...flashes the OD light and shifts hard enough to give you whip lash.
Remove the sensor, clean the fuzzy crap off it, re-install, check the wiring too for corrosion ect, reset the PCM by pulling #22 & #9 fuse under the hood & turn key to run, then off. Replace the fuses, see if the trouble goes away. If not, get the codes and post them here.
Remove the sensor, clean the fuzzy crap off it, re-install, check the wiring too for corrosion ect, reset the PCM by pulling #22 & #9 fuse under the hood & turn key to run, then off. Replace the fuses, see if the trouble goes away. If not, get the codes and post them here.
From his other treads his problem seems to be in the RPM surging. This would indicate a possible slip. If it were a surge in the speedo i would look into the VSS system. This is not the case.
OP
Have the codes pulled.
Bill
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Posting Guru
Joined: Sep 2004
Posts: 1,096
Likes: 2
From: Ohio
x2 what madvan said,
We have posted in two ther threads this guy has listed, and he keeps starting a new one for the same thing.
Come on buddy, pay attention..............one thread at a time for the same issue.
We have posted in two ther threads this guy has listed, and he keeps starting a new one for the same thing.
Come on buddy, pay attention..............one thread at a time for the same issue.
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