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Cat 143h transmission

Cat 143h transmission

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Leighva

Active Member
Joined
Jun 4, 2018
Messages
38
Location
Sandpoint, Idaho
Mark250 seems to be on the right course here. I’d swap a few solenoids around and see what changes.
I had a similar problem in my 143 and found it to be a a couple bad shifting solenoids. Cat did the repair but as I remember it takes two or 3 solenoids working together to select a gear both forward and reverse. I don’t remember which combinations go with each gear.
I had 1f and 3f and 1r or something then lost that too. As I recall they replaced more then one bad solenoid and that fixed it. Later I lost another on but realized it was a similar issue. good luck.
 

Leighva

Active Member
Joined
Jun 4, 2018
Messages
38
Location
Sandpoint, Idaho
I don’t find anything on shifter. How can i check the ecm ?
Maybe one of the other Techs posting before me could help. I would recommend checking the basics again. Be sure you still have voltage to both sides of all your fuses and you don’t show any codes. A bad ground or a blown fuse often result in me spending hours looking for a problem that results to one of these. As said before, be sure you don’t have a broken wire in your harness. It happens often.
Good luck.
 

GEORGIOS198217

Well-Known Member
Joined
Sep 18, 2020
Messages
83
Location
Greece
Thank all but all electrical is ok. After Christmas I will repair the transmission and i will finish. I am thinkingalso to check the differential and put all the bearings of transmission and differential new. What you think for this?
 
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