Stock 20s with 3.31s - 3.5EB?

[Ericsnow25]

I currently have a 2021 XLT crew cab 4x4 2.7 with 3.55s. Love it, although it arrived with 700 miles (from a different location same dealer) and has 3-4 spots where the there's paint issues (all paint deep), in addition to some scratches that could be buffed out.

I went ahead and bought it as the sales manager said the body shop will get those areas fixed. A couple weeks later I go in and the body shop manager says it's going to be $5k+. So now they're buying the truck back and getting invoice on another 2021.

New truck I'm looking at: XLT crew cab 4x4 3.5EB with 3.31s & the optional 20" sport wheels with the 275/60R20 tires. ****What I'm worried about is since for 2021 Ford switched their 20" wheels to 275/60R20 (33") from 275/55R20 (32") in past years. -- That combined with the 3.31 E-lock gears ... I will tow a 4000lb travel trailer a couple times a year is all. But I'm also a very spirited driver and don't want to take a hit on performance from my 2.7 3.55 gears with the sport 18" wheels. I did some dragy runs with the 2.7 and it's right at 14.4-14.5 @94mph consistently over 3-4 runs.

So, anyone else have the 3.5EB with 3.31s with 20" wheels? Still have some performance?

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[diesel97]

I currently have a 2021 XLT crew cab 4x4 2.7 with 3.55s. Love it, although it arrived with 700 miles (from a different location same dealer) and has 3-4 spots where the there's paint issues (all paint deep), in addition to some scratches that could be buffed out.

I went ahead and bought it as the sales manager said the body shop will get those areas fixed. A couple weeks later I go in and the body shop manager says it's going to be $5k+. So now they're buying the truck back and getting invoice on another 2021.

New truck I'm looking at: XLT crew cab 4x4 3.5EB with 3.31s & the optional 20" sport wheels with the 275/60R20 tires. ****What I'm worried about is since for 2021 Ford switched their 20" wheels to 275/60R20 (33") from 275/55R20 (32") in past years. -- That combined with the 3.31 E-lock gears ... I will tow a 4000lb travel trailer a couple times a year is all. But I'm also a very spirited driver and don't want to take a hit on performance from my 2.7 3.55 gears with the sport 18" wheels. I did some dragy runs with the 2.7 and it's right at 14.4-14.5 @94mph consistently over 3-4 runs.

So, anyone else have the 3.5EB with 3.31s with 20" wheels? Still have some performance?

The bigger question is are you sure you want to deal with a dealership that lied and screwed you over all ready

 

[Ericsnow25]

The bigger question is are you sure you want to deal with a dealership that lied and screwed you over all ready

I mean...if they're giving me the purchase price for trade allowance? And giving me invoice pricing on the new one? I only got $400 off msrp and $2000 customer offer on the "old one". Old one was $52.4k msrp, so with the $2400 off I paid $50k. They're giving me $50k on trade and invoice on a dealer trade (they don't have anything close to what I want/need).

I had a 2011 F-150 CC xlt 3.5EB with the 3.31 open diff, it was pretty quick. On 18s thou. Then I tuned it and I'd imagine it was around a 14.0 sec truck.

 

[Ericsnow25]

I had no reason to worry. The 3.5 with 3.31s, 20s and full 36 gallon tank was running 14.06 and 14.07 @ 96.5mph.

8.99 was best “verified“ 1/8 mile time, other couple good ones were 9.05ish. Definitely a couple tenths quicker in the 1/8 and 1/4. Can’t wait for 5 star to release and tune and be more mid 13s!

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