jmckelvy wrote:
dryfly wrote:
It appears I'm getting excessive slippage or "shear" in the TC. Adding additional cooling or manually shifting seems to me like putting a band-aid on the problem. I can only see these solutions in extreme situations when you have a transmission/TC set up to optimum and you are looking for the last ounce of performance, not as an initial solution.
How do you know this? What temperatures are you actually reading? Let us know that rather than just saying its "hot".
Hot is really subjective and newer transmissions with modern fluids can run substantially hotter just fine than some of us older guys remember from our early days. :)
I've seen as hot as 236 degrees on mine for short periods of time under heavy load. It normally runs about 15 to 20 degrees lower than the coolant temp.
OK, here are details: Using Castrol ATF+4 fluid changed at recommended intervals. Measuring fluid temp as it comes out of TC going to cooler (hottest place in the system).
Driving while pulling trailer in 4th gear, TC locked temp is ambient plus 80-90 degrees. Towing up extended incline temp can rise to 230-240 degrees pretty quick, 250 on occasion. In stop and go traffic 220-230 is common. This is with ambient temp in the eighties or cooler.
Truck is stock with OEM transmission pan.