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1991 Dodge B250 ODoff switch #735873
May 03rd 2018 12:24 pm
May 03rd 2018 12:24 pm
Joined: May 2018
Posts: 1
Tennessee
F
fuzzripperdusty Offline OP
stranger
fuzzripperdusty  Offline OP
stranger
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Joined: May 2018
Posts: 1
Tennessee
I recently had the transmission rebuild in my van. Everything shifts accordingly, overdrive kicks in and what not, but I can’t bypass overdrive.

The button illuminates when the transmission automatically turns overdrive off,but I can’t bypass overdrive with the momentary switch(ground to pcm).

Has anyone encountered this issue?

Replaced speed sensors so far.

Re: 1991 Dodge B250 ODoff switch [Re: fuzzripperdusty] #735874
May 03rd 2018 12:26 pm
May 03rd 2018 12:26 pm
Joined: Jun 2010
Posts: 13,923
Van Diego California
frscke1 Offline
frscke1  Offline

Joined: Jun 2010
Posts: 13,923
Van Diego California
Welcome to the site ...


SUNSHINE VANS-VAN DIEGO
ADRENALIN BY THE GALLON & CHASIN RACIN
ONE FOR THE DIRT & ONE FOR THE STREETS
'93 CHEVY G30 454 4X4 SPORTVAN EXT 146" WB
'92 CHEVY G30 454 BEAUVILLE EXT 146" WB
Re: 1991 Dodge B250 ODoff switch [Re: fuzzripperdusty] #735875
May 03rd 2018 1:22 pm
May 03rd 2018 1:22 pm
Joined: Apr 2010
Posts: 2,633
San Diego
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wrcsixeight Offline
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wrcsixeight  Offline
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Joined: Apr 2010
Posts: 2,633
San Diego
I have an 89 b250 whose overdrive recently started operating at different speeds than normal, and kicking in and out at 35 to 40MPH.

It is now operating as before, after resetting the ECM, but unplugging the battery for a while.

It is also possible my cleaning the base of the shift lever and electrical connector with wirebrushes and compressed air had some effect. I had reviously cleaned the connectors pins and sockets with Deoxit D5 with mini bottle brushes and precision swabs so I do not believe the compressed air did anything for the connector, but perhaps.

Or it could have been since I bought new solenoids, gasket and filter and 6 Quarts of atf+4 and had it all ready to drop the pan, that it decided to operate properly again.

If you do inspect the OD off button, be careful. I can't remember specifically what happened but I remember I was very relieved when I got it back together, installed, and it worked.

But Start with an ECM reset. I just unhook the battery for a while but some say to unhook it and turn key to start for 30 seconds. perhaps that is later models.



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