Tuning for injectors

[Highbeam]

Good thread for those of us that aren't drag racers. I hate to say the word but I have made some solid upgrades to my truck that I highly recommend.

The Ford AIS air intake system is a huge improvement in quality and filtration over the stock system that is known to fail.

The auxiliary transmission cooler allows me to use the truck as Ford intended. Even at stock power levels the stock trans fluid cooler is so small that the trans will overheat in normal conditions.

Neither of these added power but they were upgrades for reliability and dependability. I think it is too much to say that all changes from OEM are downgrades. I do understand your point though, that some mods are best left undone.

[cleatus12r]

Originally Posted by Highbeam

Even at stock power levels the stock trans fluid cooler is so small that the trans will overheat in normal conditions.

If a truck's transmission fluid is overheating (stock or otherwise), one needs to rethink the way they're using the truck.

An automatic transmission's fluid gets hot because of two things:
1: The torque converter clutch is never commanded to be applied. Fluid coupling creates a ton of heat in the fluid. Low speed (typically under 45 MPH) will cause the torque converter clutch to remain disengaged (depending on tuning). That's the main reason transmission temperatures soar in around-town driving.

2: There is friction material not holding against the steel plates. "Slippage" is a major cause of heat and the transmission will not live long under these circumstances. Whether the transmission is just old or there is too much power input, slippage is death to a transmission; and it will NEVER get better. Once the frictions are glazed and the steels begin to get hot spots, the transmission needs a rebuild.

It does not matter one bit about whether the truck is stock or not but whether the transmission is healthy and can withstand additional power input. An additional cooler (or a larger one) is always a good idea and I won't knock anyone for adding one. Just know that masking problems isn't a good practice.