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If those wires shorted together, you may be in need of a new TCM. Make sure the other wires around there are ok, and properly insulated.
Mice chewed through trans speed input wires, tran stuck in 2nd gear
99 Avenger, 2.5, 4speed automatic: Car started shifting bad then stuck in 2nd rear. Read in might be input speed sensor. Went to replace it and found that mice had chewed through the 2 wires leading to the input sensor. I correctly spliced the wires together, replaced the input sensor. Car drives great for 1/2 mile the it bumps, reeves up then sticks in 2nd gear. Check eng light comes on. Codes po700, p0733, p0734. Help
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1966 Crown Coupe, 2016 200 S AWD, 1962 Lark Daytona V8.
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I would look for more chewed up wires first.
The TCM, like the PCM has pretty robust protection from over-voltage, reverse polarity and 5 volt sensor shorts to ground.
I think that if it was damaged, it would stay in limp-in from the start.
Does an 'off-on' key cycle return shift operation to normal?
The TCM, like the PCM has pretty robust protection from over-voltage, reverse polarity and 5 volt sensor shorts to ground.
I think that if it was damaged, it would stay in limp-in from the start.
Does an 'off-on' key cycle return shift operation to normal?
Ok, I replaced the tcm, still getting p0700 and p0733, it drove better, maybe for 3/4 of a mile then check engine light came on and went to 2nd gear. I stopped, cycled the key, drove good for 1 mile, than went to 2nd gear. Any thoughs?????
1966 Crown Coupe, 2016 200 S AWD, 1962 Lark Daytona V8.
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17,277 Posts
Ignore P0700. P0733 is a gear ratio error in 3rd gear. Does this happen right at the 2-3 shift or while going down the road in 4th?
Overdrive and underdrive clutches are engaged for 3rd gear. you might want to watch a pair of ATF pressure gauges under your drivers side wiper blade when the default occurs to see if a clutch loses pressure (internal hydraulic problem) or hold steady and that could be an electrical or internal mechanical problem.
The key-cycle fix makes me think that it may still be electrical.
A high-zoot scan tool that can watch transaxle sensor and actuator parameters while on a road test could probably nail this.
Overdrive and underdrive clutches are engaged for 3rd gear. you might want to watch a pair of ATF pressure gauges under your drivers side wiper blade when the default occurs to see if a clutch loses pressure (internal hydraulic problem) or hold steady and that could be an electrical or internal mechanical problem.
The key-cycle fix makes me think that it may still be electrical.
A high-zoot scan tool that can watch transaxle sensor and actuator parameters while on a road test could probably nail this.
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The info I have is that both codes can be caused by low battery voltage or grounding issues. I'm still thinking electrical.
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