Join Date: Apr 2007
Location: Topeka by way of Denver
Bronco Info: 1989 Bronco, 302efi, - 1993 F150, 351efi. 33x12.50's, too many mod to list
E40d getting really hot. TQ slipping? or need more cooling?
I had my e40d belch out hot fluid through the front seal while pulling my boat from Denver to Topeka. I had the seal replaced and it has held fine. I put a temp gauge on the tranny fluid "OUT" line and am getting high temps on both highway and town driving (210 f.+). On my first highway test, the tranny did fine on temp at first, but it finally climbed to 210 degrees. I slowed down to get off the highway and the sucker shot up to 250 degrees. That was the precise scenario when my front seal went (slowing down to pull off the off-ramp). Other than running way too hot, the tranny operates and shifts like it always has and has no apparent problems. The mechanic I had change the seal said the TC had a little blue heat discoloration. Pump was good and no other problems he could see,, just that the TC had gotten hot.
I have the factory towing package with a small factory cooler (in addition to the radiator heat exchanger). I've made no mods to the tranny other than the new temp gauge.
I think it could be 2 things,,,
1. Factory tarnny fluid cooler is not passing the fluid through real well and needs to be cleared out or replaced. If replaced I will use a much bigger cooler.
2. The TC is slipping continuosly creating way more than the usual heat and the current setup can't keep things cool.
My rig has 150k miles on it, I'm pushing 33" tires with a 3:55 gears (I know, way lean on the gears).
Any ideas and tips for checking these things and getting my temps down to where they need to be? If something (like the TC) is going out causing it to get way to hot, I want to fix that, not just "treat the heat".