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That stinks.

So I did the manual math when I put mine on and the speedo and gps were not the same. I used ChatGPt to calculate the error and provide an updated value for tire circumference. My speedo and GPS are identical now. 2537 was my final value. Entered with no issues

Curious if anyone was able to easily make this work. I have a Lariat with the factory bed lights and they’re plenty bright enough. Just hate the switch location. I asked ChatGPT and got some options but I don’t want to run a new wire from the cab where the control module is to the bed to...

Still not good enough IMO. Should be able to note that it is a result of owner configuration or something. I prefer driving my truck in Sport mode. I'm not flooring it all the time, but it's def more responsive and feels like it shifts better. I get that these are all first world problems...

So I know it's a dead horse, or at least thoroughly beaten, but I still can't understand the inability to change the default drive mode. I wonder what the logic is? Typically manufacturers cite safety, but what's the safety concern of my truck being in Sport or Tow mode when I start it up...

So finally got the spacers installed. Very easy. I don’t think the vibration is completely gone but it is much better. I’m satisfied.

Best I could do

Like those sill protectors. OEM?

No idea but I’m sure it could cause some variation but 3mph difference? Dunno. I’ve got mine at 35.

So I threw it into ChatGPT. This is what I got back: To correct the tire size setting in your truck’s computer, you need to adjust the circumference value so that the speedometer reads accurately. Your truck thinks it’s going 50 mph when it’s actually going 48 mph, meaning the indicated...

So mine was good before the bigger tires. Used Forscan and it’s still off about 3mph. Speedo reads faster than I’m actually going. Need someone to help me math. 275/70R18 are ~2646 mm in circumference. How much and in what direction should I adjust to makeup the ~3mph discrepancy?

I think those are VZs. The Cocobolo are Craig Spegels.

I shoot quite a bit. In my side business I actually build custom handguns. Also have my own range on our property.

That's a fantastic question. I don't know. I'm not a suspension expert. My plan is to install the spacers incrementally via trial and error to see if/when the vibration goes away.

Blocks are not tapered

Not as easy to replicate since the TSB tells you to go off the flat of the flange. Front and rear connections don't have one. I suppose I could measure on each shaft itself?

So for more shits n giggles I decided to measure the angle based on the instructions in the 19-23 TSB. Assuming the angles haven't changed from 23-24 and 5-6 degrees is still the sweet spot, mine is definitely off.

That is correct. My assumption here is that this is a tolerance stacking/intermittent issue for Ford. Some vehicles may have it, others don't. If you read up on the 5G issues you see that it was kinda the same thing. I'm thinking (hoping) that mine was just at the point where the rear blocks...

Well there went $50. No change Ordering this kit and will install myself. Turbo easy. Will just have to trial and error how many spacers are needed as I didn't measure the original angle and have no way of measuring what it needs now. Interestingly enough I found the tech bulliten on the...

For shits n giggles I’m going to go ahead and have the road force balancing done. It’s only 50 bucks so it’s worth a shot.