Jeep Cherokee Forum - faulty O2 and overdrive

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rangerone

03-10-2011 12:16 PM

faulty O2 and overdrive

is it possible that a bad O2 sensor will prevent the trans from shifting into overdrive? after replacing my O2 sensor the other day jeep has been running better than ever. now at 70 mph i'm only turning 2100 rpm. before swapping O2's i would be at 2800 rpm at 70 mph.

djb383

03-10-2011 01:02 PM

Did u have a CEL......wouldn't think a properly functioning O2 would prevent shifting to OD. Low engine temp can delay shifting to OD.

rangerone

03-10-2011 01:49 PM

Quote:

Originally Posted by djb383 (Post 903185)

Did u have a CEL......wouldn't think a properly functioning O2 would prevent shifting to OD. Low engine temp can delay shifting to OD.

yes i did have a cel for the O2 sensor. no problems with low temp either.

fishtaconc

03-10-2011 03:51 PM

Quote:

Originally Posted by rangerone (Post 903117)

Sounds like you are going into overdrive higher gear= lower RPMs

phoenix901223

03-10-2011 05:57 PM

Im at 2000rpm going 60 with 30x10.5 on stock 15x7 stock gears. Does that sound right? I feel like its too high? What does everyone else cruise at?

fishtaconc

03-10-2011 06:17 PM

Quote:

Originally Posted by phoenix901223 (Post 903707)

Im at 2000rpm going 60 with 30x10.5 on stock 15x7 stock gears. Does that sound right? I feel like its too high? What does everyone else cruise at?

Google rpm calculator. itll tell you what your gear ratio is and you can figure where your rpms will be with lower gears/taller tires etc

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