L0566Bullitt
Well-Known Member
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Posting here as well to try and get some more visibility.
On June 5th I bought a 2020 Bullitt. Love the car but first thing I noticed was how long the gears were. I could never do a pull and even get into 4th on the highway. That's ridiculous. What a waste of 4th, 5th, and 6th gear. So with only 1800ish miles on it, I took it to East Coast Gear Supply and had them swap the stock 3.73s for 4.88s. Completely different car, pulls insane and now it actually feels like a 500+ hp car. However, the PCM does NOT like the new gears. It's throwing all sorts of blindspot, parking aid, cross traffic, neutral switch shorted to ground, abs, and powertrain control module faults. I took it to the dealer and they have no idea what's wrong. They said somehow they're all tied in to the network and if one thing is off (like gear ratio), then it throws everything off. They said they put a request into corporate Ford for help. In the mean time, I took it home and hooked it up to Forscan which found all sorts of DTCs. In the BdyCAM there are two rows for "Axle Ratio". One row let's me manually enter 4.88 which is good, but the second one only let's you select 4.10 as the lowest gear ratio. Since I have the one above it set to 4.88, the one below reads something like "48800 - Incorrect or Incompatible Configuration" or some sort of error.
I have a few questions. Has anyone heard of a gear swap messing with the BLS/rear parking aid/cross traffic/ABS/neutral switch sensors? I will say that when I first drove it home off the lot, I noticed it never displayed the gear I was in like I had noticed in some videos previous to purchasing. I just thought I didn't have the display set correctly. It also had some faults show up but I just thought it was buggy software so I restarted the car and they'd all go away. Every once in awhile I'd receive some of the same faults and it wouldn't allow me to change drive modes and/or steering options. I once again just thought it was buggy and didn't pay much attention to it. But now that I'm getting the neutral switch shorted to ground fault, it's all making sense now. After I clear that DTC, as soon as I drive down the driveway about 50 feet, the neutral switch DTC is thrown and I lose my gear position indicator on the dash. Instead of showing N, R, 1st, 2nd, etc., it's just blank (see pics below).
Fast forward to getting the gears upgraded, and now it does this ALL the time. They drove it before and after and even they noted it was messed up. I told them not to worry about it because it had done it before so I just figured a simple reboot would fix the problem like before. But the difference is after they swapped the gears it does it ALL the time now. Question is, are there sensors down by the rear axle they could have broken and/or plugged in backwards?? Both the left and right Side Obstacle Detection Control Module (SODCMs) are throwing faults as well. I've used Forscan to do module resets on every single module I can, cleared DTCs, did PCM relearning, EVERYTHING I can think of to try and clear these faults but nothing makes them go away permanently.
I told the first dealer (where I purchased it from) it almost seems as if there's a wiring problem since I'm getting "shorted to ground" faults. He said that is definitely not uncommon for these cars. I was surprised to hear that.
A different Ford dealer also told me that changing the values in Forescan isn't enough and that the PCM actually has to be flashed for 4.88s to match what is set in the modules that Forescan can write to. This doesn't make sense to me; isn't Forescan writing values TO the PCM?
As a last resort, I purchased an SCT X4 from Steeda as they seem to be the only ones with a Bullitt tune so I'm hoping I can set the gears to 4.88 there. I'm not going to do anything else because I don't want to void the warranty. Everyone says SCT can do 4.10s and 4.56s but no one knows if it can do 4.88s. Anyone know if the SCT X4 can flash 4.88s as well??
In one of the pictures you can see I'm in 6th gear but there's no indicator in the center of the tach...it's just blank.
The other pictures are of the wires shorted to ground. I think it may actually be a wiring problem??
Any input is greatly appreciated. View attachment 500143
On June 5th I bought a 2020 Bullitt. Love the car but first thing I noticed was how long the gears were. I could never do a pull and even get into 4th on the highway. That's ridiculous. What a waste of 4th, 5th, and 6th gear. So with only 1800ish miles on it, I took it to East Coast Gear Supply and had them swap the stock 3.73s for 4.88s. Completely different car, pulls insane and now it actually feels like a 500+ hp car. However, the PCM does NOT like the new gears. It's throwing all sorts of blindspot, parking aid, cross traffic, neutral switch shorted to ground, abs, and powertrain control module faults. I took it to the dealer and they have no idea what's wrong. They said somehow they're all tied in to the network and if one thing is off (like gear ratio), then it throws everything off. They said they put a request into corporate Ford for help. In the mean time, I took it home and hooked it up to Forscan which found all sorts of DTCs. In the BdyCAM there are two rows for "Axle Ratio". One row let's me manually enter 4.88 which is good, but the second one only let's you select 4.10 as the lowest gear ratio. Since I have the one above it set to 4.88, the one below reads something like "48800 - Incorrect or Incompatible Configuration" or some sort of error.
I have a few questions. Has anyone heard of a gear swap messing with the BLS/rear parking aid/cross traffic/ABS/neutral switch sensors? I will say that when I first drove it home off the lot, I noticed it never displayed the gear I was in like I had noticed in some videos previous to purchasing. I just thought I didn't have the display set correctly. It also had some faults show up but I just thought it was buggy software so I restarted the car and they'd all go away. Every once in awhile I'd receive some of the same faults and it wouldn't allow me to change drive modes and/or steering options. I once again just thought it was buggy and didn't pay much attention to it. But now that I'm getting the neutral switch shorted to ground fault, it's all making sense now. After I clear that DTC, as soon as I drive down the driveway about 50 feet, the neutral switch DTC is thrown and I lose my gear position indicator on the dash. Instead of showing N, R, 1st, 2nd, etc., it's just blank (see pics below).
Fast forward to getting the gears upgraded, and now it does this ALL the time. They drove it before and after and even they noted it was messed up. I told them not to worry about it because it had done it before so I just figured a simple reboot would fix the problem like before. But the difference is after they swapped the gears it does it ALL the time now. Question is, are there sensors down by the rear axle they could have broken and/or plugged in backwards?? Both the left and right Side Obstacle Detection Control Module (SODCMs) are throwing faults as well. I've used Forscan to do module resets on every single module I can, cleared DTCs, did PCM relearning, EVERYTHING I can think of to try and clear these faults but nothing makes them go away permanently.
I told the first dealer (where I purchased it from) it almost seems as if there's a wiring problem since I'm getting "shorted to ground" faults. He said that is definitely not uncommon for these cars. I was surprised to hear that.
A different Ford dealer also told me that changing the values in Forescan isn't enough and that the PCM actually has to be flashed for 4.88s to match what is set in the modules that Forescan can write to. This doesn't make sense to me; isn't Forescan writing values TO the PCM?
As a last resort, I purchased an SCT X4 from Steeda as they seem to be the only ones with a Bullitt tune so I'm hoping I can set the gears to 4.88 there. I'm not going to do anything else because I don't want to void the warranty. Everyone says SCT can do 4.10s and 4.56s but no one knows if it can do 4.88s. Anyone know if the SCT X4 can flash 4.88s as well??
In one of the pictures you can see I'm in 6th gear but there's no indicator in the center of the tach...it's just blank.
The other pictures are of the wires shorted to ground. I think it may actually be a wiring problem??
Any input is greatly appreciated. View attachment 500143
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