Attention: TDR Forum Junkies I have a 99 with an auto and 3. 54's basically stock with an ez. I just recently installed gauges and regularly tow 7000 lb trailer. When towing some monster grades last week on highway 5 from california into medford oregon in 100 degree heat I was really watching the gauges carefully. The sender is in the output line of the trany going up to the engine heat exchanger. On the flats towing at 60 mph the temps are between 170-180 in overdrive. On smaller hills when I need to shift out of O. D. to maintain speed it would climb to 200 -210. On the monster ( 6% + for 10 miles I had to shift into second to maintain 35 mph and trany temp started up and I even had to back out of the throttle to about 30mph to keep the temp under 260. This all seems about normal. The wierd thing is that at the tops of grades where the trany fluid gets hot when you switch into overdrive for the big downhill the fluid temp drops like a rock like it is getting fluid from somwhere cooler in the transmission and almost immediately the transmission temp is back to normal. But If I keep it locked out of overdrive for the downhill for engine braking the temps will barely even drop.
Can someone tell me what is going on as far as fluid path and operating instructions, Max temps?
Can someone tell me what is going on as far as fluid path and operating instructions, Max temps?
