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Originally Posted by Speedster
A question to add to the auto pile: Has anyone had any cooling (overheating) problems with the automatic trans or the torque converter ? How large a tranny cooler do you need, and between a radiator, intercooler, a/c fins, where have people located their tranny coolers ? What is the overall weight difference between a 4L80E versus a T-56/TKO-600? I want to use a Shrifter with a 4L80E on an upcoming project. Is the point the converter locks up completely programmable from a laptop ? With a laptop or other controller can you have multiple pre-programmed shift maps ? How many ? What are the available 4th gear ratios on the 4L80E ? i.e. how large a drop between 3rd and 4th can be put in to the 4L80E ?
Steevo (or Mark Bowler) - how much power CAN this transmission truly handle ? Assume the extreme case of slicks in a drag race environment. Sorry about all the questions but this is a great thread.
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Dern Bruce! That's like 19 questions.
Cooler: Just cracked open my TCI 4L60E for the first time after positively crucifying it for the last four years during paddle shifter R&D. The pan was as clean as a whistle with the pan magnet catching any normal wear. Cooler capacity is 12"x4" for 500HP. I have not seen one single case of excessive heat due to manumatic control.
Lock-up. Yes completely laptop programmable and based on driven wheel speed.
Maps: Maps are handled two ways. Common pc files that are stored on your laptop and uploaded as needed AND tow or more variations that can be toggled by switch or sensor. In your case, I would run the PCS controller and use two load inputs--TPS and Boost. TPS would be the primary load input. Regarding the boost input, when the engine sees vacuum the trans is a *****cat. Boost? The calibration firms up.
That's it for now. More later or tomorrow.