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Down and Dirty Transaxle Build
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<blockquote data-quote="patooyee" data-source="post: 467631" data-attributes="member: 483"><p>Yes. Most of GM's 4-speed electronic controlled transmissions all use the same or similar control solenoids, etc. They even used the same TCM's from generation to generation. If you look up part numbers for shift sol. a for a 4t40, 45, 4t65, 4l60, 4l80 many are the same part numbers. And if you look up the TCM's many are shared from generation to generation. And if they aren't the same part numbers the are basically the same anyway. They have different control logics sometimes. Depending on what software you are using to tune you can even change the control logic to use a truck TCM on a car trans or vice versa. There is a stand-alone trans controller made by TCI or some company made for the 4l60/80 that GM Performance used to control a performance version of their 4t65e in their 1000hp Ecotec drag car. The poitn of all fo this is just to sya that the TCMs may seem intimidating but at the transmission level its all just a bunch of solenoids and switches controlled by the same 12 volts as everything else. You can dumb it down or complicate as much as you want.</p><p></p><p>There is a guy on Pirate that sells shifters for the electronic Jeep transmissions. He's done exactly what I am describing. His shifter has mico switches built into it and he eliminates the TCM completely. At that point its just the shifter switching the solenoids on and off in the correct combinations.</p></blockquote><p></p>
[QUOTE="patooyee, post: 467631, member: 483"] Yes. Most of GM's 4-speed electronic controlled transmissions all use the same or similar control solenoids, etc. They even used the same TCM's from generation to generation. If you look up part numbers for shift sol. a for a 4t40, 45, 4t65, 4l60, 4l80 many are the same part numbers. And if you look up the TCM's many are shared from generation to generation. And if they aren't the same part numbers the are basically the same anyway. They have different control logics sometimes. Depending on what software you are using to tune you can even change the control logic to use a truck TCM on a car trans or vice versa. There is a stand-alone trans controller made by TCI or some company made for the 4l60/80 that GM Performance used to control a performance version of their 4t65e in their 1000hp Ecotec drag car. The poitn of all fo this is just to sya that the TCMs may seem intimidating but at the transmission level its all just a bunch of solenoids and switches controlled by the same 12 volts as everything else. You can dumb it down or complicate as much as you want. There is a guy on Pirate that sells shifters for the electronic Jeep transmissions. He's done exactly what I am describing. His shifter has mico switches built into it and he eliminates the TCM completely. At that point its just the shifter switching the solenoids on and off in the correct combinations. [/QUOTE]
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