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2017 - 2022 Super Duty The 2017-2022 Ford F250, F350, F450, F550 & F600 Super Duty Pickup and Chassis Cab
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Old Oct 22, 2017 | 06:23 PM
  #16  
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Robb81
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From: Texas
Edit: I did the math, there's a 2.8% difference in the (most popular) stock 275/70R18 and the 275/65R20.... I'm gonna take a wild guess and say you'd never know the difference.

Agreed.
Now do the math on a 3.55 geared truck with the 275/65R20 vs a 3.31 truck with the 275/70R18 so you can confirm for yourself exactly what I said that there isn't MUCH difference.
 
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Old Oct 23, 2017 | 11:18 AM
  #17  
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mrgrayaz
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Originally Posted by 69cj
Beg to differ. Ran mine for 10 years with 3:73’s thru the Eastern Sierras pulling a 31’ 5er. Totally stock. Only problems were turbos. 6.0 can be solid if data and maintenance is followed.
I also beg to differ. The previous owner and I did all prescribed maintenance on that 6.0 - in fact, over $24k in dealer maintenance in 50k miles to that truck, I have all the receipts - including a new EGR/oil cooler once already @ 136k miles or so. No tuner, never been tuned. $.44/mile to run. Stock TTY head-bolts.

My thought was if I just kept it well maintained the TTY's would not be a big problem. Still blew up on me. but I mean we tow heavy weekly, every week, and its my only vehicle, so it worked hard. I'm sure if I had gotten a studded one with a deleted EGR, I'd still be driving it.
 
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