46rh not shifting into overdrive - JeepForum.com
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post #1 of 5 Old 06-17-2011, 12:30 PM Thread Starter
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1993 ZJ 
Join Date: May 2011
Posts: 2
46rh not shifting into overdrive

I have a '93 Jeep Grand Cherokee 5.2 V8. I just replaced the original transmission with a 46rh with 120,000 miles on it. It is shifting fine, however overdrive is not kicking in. Its still running at 2500 RPM around 50 mph. I had a friend put the transmission in and he is clueless as to why this is happening. All the fluids are fine. Any opinions?

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post #2 of 5 Old 06-17-2011, 02:02 PM
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1994 ZJ 
Join Date: Sep 2010
Location: Farmington
Posts: 219
Have you tried adjusting the TV cable yet?


'94 ZJ, 4.0L, 231 TC
Icom V-8000 with 1/4 wave
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post #3 of 5 Old 06-17-2011, 03:50 PM
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1995 ZJ 
Join Date: Jan 2011
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Does your speedometer work?
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post #4 of 5 Old 06-18-2011, 08:09 AM Thread Starter
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1993 ZJ 
Join Date: May 2011
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Well, the OD decided to kick in on my way home from work yesterday. Weird, but hopefully its here to stay.
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post #5 of 5 Old 06-18-2011, 06:32 PM
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1998 ZJ 
Join Date: Jun 2010
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What about the brake light switch, down by the pedal? I thought I read somewhere that this could cause the overdrive to disengage & make the cruise control inoperable.

I had the OD disengage on my ZJ last night on the way home. It started when I hit the highway. It would engage, then disengage. I wiggled the brake pedal with my foot while it was out of OD & it engaged again.

My cruise also doesn't work. I'm going to purchase a switch & hopefully it solves both issues. I'll keep you posted.
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