OVERKILL
$100 Site Donor 2021
Originally Posted By: Brent_G
Originally Posted By: OVERKILL
Originally Posted By: Miller88
Originally Posted By: Jameson
I too have a 2v 5.4l (2002 F350) and I have heard horror stories about the tunes cooking transmissions.
Unfortunately, Ford trucks of that era had very weak automatic transmissions.
Huh? The 4R75W and the 4R100 weren't weak transmissions. However the 4R100 behind the PSD had converter failure issues (dual clutch converter). But was fine behind the gas engines.
We have 4 in service, 3 of which have never seen a fluid change at close to 200k miles in a tow trucks that also plow snow. My truck was not changed until 130k. No failures so far.
That's been our experience too (similar). We've had 3x 4R100's behind 5.4L 2V's in Expeditions and they've been bomb-proof.
Originally Posted By: OVERKILL
Originally Posted By: Miller88
Originally Posted By: Jameson
I too have a 2v 5.4l (2002 F350) and I have heard horror stories about the tunes cooking transmissions.
Unfortunately, Ford trucks of that era had very weak automatic transmissions.
Huh? The 4R75W and the 4R100 weren't weak transmissions. However the 4R100 behind the PSD had converter failure issues (dual clutch converter). But was fine behind the gas engines.
We have 4 in service, 3 of which have never seen a fluid change at close to 200k miles in a tow trucks that also plow snow. My truck was not changed until 130k. No failures so far.
That's been our experience too (similar). We've had 3x 4R100's behind 5.4L 2V's in Expeditions and they've been bomb-proof.