Flyboygsxr
ADAM
Not to change subjects but has anyone changed their diff fluid yet? What are the recommended intervals of track vs street driving?
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Flyboygsxr said:Not to change subjects but has anyone changed their diff fluid yet? What are the recommended intervals of track vs street driving?
tim said:Ford says after the first hour and then every 12 hours. Reality change it after the first track day, everything will be well mated by then. If you are going to swap it move up to a 75W-140.
So with 75W-140 you don't go into limp mode?voodoo child21 said:75W-140 is the oil to use on track regardless of Ford's factory fill. I run Miller Oils with no friction modifier. I ran the factory 75W85 and got the overtemp warning in 3 laps and the wrench light warning at 5-6 laps. With Millers 75W90 I got the warning between 4-6 laps and never got the wrench. With Millers 75W140 I have only gotten the overtemp warning twice during 25 minute sessions at Watkins Glen, most times I don't get it at all. I have been putting together factory track pack parts to add a diff cooler to my car, will complete it before next season.
Steve
65sohc said:So with 75W-140 you don't go into limp mode?
Flyboygsxr said:I wonder if leaving the nannies on could increase temps like they did in the Boss?
Flyboygsxr said:Are you in a GT350 or a regular GT? Do you have a differential cooler? I ask because the differential on my GT350 has never gotten anywhere near overheating and I've done 30 minute sessions in 85-90 degree ambient temperatures.
Adam
I saw 257+ on mine with a cooler and stock fluid. What's high? See the first post in this thread.tim said:Adam, with a cooler you will not see the high temps, if you track the car 140 is a much better option if you are changing it.
293F is high. Not sure if rear diff causes limp mode on Shelby's, it just gives a warning and code on the GT's. The Shelby coolers rely on airflow under the car so depending on track temp, ambient and speeds even with a cooler it will get hot. The air across the cooler is everything under the car (which is hot) so the delta gets smaller. Maybe the solution woud be to add an additional cooler with fan in series so you gain fluid capacity and liquid to air surface. If you operated the pump with an additional cooler/fan between sessions you would be able to lower starting temps closer to ambient.VoodooBOSS said:I saw 257+ on mine with a cooler and stock fluid. What's high? See the first post in this thread.
Just updated my sig.Flyboygsxr said:Are you in a GT350 or a regular GT? Do you have a differential cooler? I ask because the differential on my GT350 has never gotten anywhere near overheating and I've done 30 minute sessions in 85-90 degree ambient temperatures.
Adam
So is the thinking that it is the differential oil temp rather than trans that is causing the limp mode on the tech pack GT350's?65sohc said:Just updated my sig.
I am just outside Toronto Ontario. When this was going on I did talk to Lund and they say their programming does not have anything to do with software associated with the diff, I later put the stock tune back in and received the same results no DTC triggered and the pump not turning from the temp sensor reading. I am saying all this because other people are reporting high diff temps and some reporting what I would say normal temps 190F, so with my experience I believe there is something wrong in the programming. I have gone to 2 different dealers who after cycling the pump keeps telling me all is good, I called Ford Canada who basically told me once you have purchased the car you are at the mercy of the dealer to help you or not. Since no DTC are triggered there is no fault for the dealer to find. I am at the point that a simple splice into the harness with a fan controller and it will be automatic again. I am just not sure if the pump should run continuous after it reaches temp or is it supposed to cycle on/off until it reaches the set point as the cooler is small and too much flow won't help cool the oil.Have you checked with Lund?
The car rolled out of the factory with the programming installed, and it's still there if Forescan and Ford IDS can control the pump. It's unlikely that Lund actually killed the software that runs the pump - if they did it wouldn't work at all. It's more likely that they turned off an option switch that stops the ECU from generating certain diagnostic trouble codes. Without DTC's, the Ford techs are flying blind and they don't know what's wrong or where to start looking, so they can't fix it. I suspect (and it's just a guess, but an educated one) that if you reflash to stock, you'll unflip the switch and at that point you'll be able to get a DTC for the pump that will tell you what the problem is.
Where are you? Canada's a big place.
The pump does pump when I change the diff fluid and I use forscan to activate it you can hear it change pitch as the fluid starts to go thru it plus when draining the diff it pumps the bal. of fluid out. It won't turn on when it is supposed to when it gets hot. Because the dealer finds no codes and can cycle the pump as far as they are concerned all is good, and they are telling me I shouldn't track my car as it voids the warranty, so much for advertising and promoting a track ready car.OK, well, it was a great theory. So, do you know if the pump is actually pumping anything? Did your friendly dealer do any kind of volume testing? The ECU runs the pump and will throw codes for lots of things, but whether the pump is actually moving anything is probably not one of them. It could be a defective pump that passes the self-test from the ECU, that spins and sounds like it's working but has an impeller that isn't moving anything.