5.0 3.55 rpms
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KKeys (03-04-2019)
#3
Senior Member
Prior - 2000 F-150, 5.4, 3.55, 17" wheel, 31.7" diameter tire, OD locked out, ~2500 RPM.
Current - 2018 F-150, 5.0, 3.55, 20" wheel, 31.9" diameter tire, all OD's locked out, ~2500 RPM.
6000# boat/trailer.
Apx. 65 MPH for both.
Current - 2018 F-150, 5.0, 3.55, 20" wheel, 31.9" diameter tire, all OD's locked out, ~2500 RPM.
6000# boat/trailer.
Apx. 65 MPH for both.
Last edited by doyall; 03-04-2019 at 06:49 PM. Reason: add mph
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KKeys (03-04-2019)
#4
In fourth gear 65mph is close to 2900 rpm? In fifth, 65mph is about 2300 rpm, downshifts for slight hills and overpasses..
The truck will run 75 mph in fouth, just a little worried about so many rpm's??
The truck will run 75 mph in fouth, just a little worried about so many rpm's??
#5
Senior Member
That's about right for stock tires (~32" diamter). The 4th gear in your 6R80 isn't comparable to either of the last poster's transmissions....they both have a 1:1 with overdrives locked out. The 6R80 as ~1.14 4th gear. I don't have any experience with the Coyote 5.0, but I wouldn't expect 2900 RPM to be harmful to a modern gas engine.
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KKeys (03-05-2019)
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#8
My 13 pulled good on stock tires only locking out 6th. 5th at 70 was 2200, it occasionally dipped to 4th for prolonged steeper hills and and was around 3k. It was easily able to maintain 70mph with 9k behind it.
#9
Senior Member
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KKeys (03-05-2019)