6-speed tranny gear ratios?

shotgun · #1 Thu, May 6th, 2010, 10:34 AM

I'm pretty darn sure I saw a post that listed the 09-10 6-speed tranny gear ratios, but I can't seem to find it...

Can anyone

me out? Please?

Thanks!

MGDfan Junior V1.0

***cleatus12r*** · #2 Thu, May 6th, 2010, 10:56 AM

From what seems to be a reputable website:

2010 F-150

1st: 4.17:1
2nd: 2.34:1
3rd: 1.52:1
4th: 1.14:1
5th: .86:1
6th: .69:1

Hope this helps.

shotgun · #3 Thu, May 6th, 2010, 10:57 AM

Thank you sir!

***cleatus12r*** · #4 Thu, May 6th, 2010, 11:00 AM

To me, everything looks great except the ridiculous split between 4th and 5th and that unreasonably high 6th gear.....IN A TRUCK.

shotgun · #5 Thu, May 6th, 2010, 11:07 AM

Quote:

Originally Posted by cleatus12r

To me, everything looks great except the ridiculous split between 4th and 5th

You can definitely feel it when you're on the interstate on-ramp, especially when you couple it with the throttle lag.

As soon as the SCT or Edge is ready for the 09-10s...

Quote:

Originally Posted by cleatus12r

and that unreasonably high 6th gear.....IN A TRUCK.

I'm pretty sure this is how they're trying to squeeze every last MPG out of the 5.4L.

SportTractoF150 · #6 Thu, May 6th, 2010, 02:51 PM

So my question is in reference to adding 35" tires to the truck.

I know in the 2004-2008 trucks with the 4 speed transmission, 35" tires and 4.56 gearing was pretty much the standard and perfect combination to make up for the power loss and to preserve the transmission.

With the current 2009+ trucks with the 6 speed transmission, what would be the equivalent? I've got a 2009 Platinum sitting on 35's...have been for a year. Should I be concerned about hurting the transmission or it dying prematurely on me? I have been toying the idea around of regearing, even after I pick up the new Gryphon CS or CTS, but I'm not quite sure on:

1) if it's needed to save the transmission
2) which gear ratio would be suitable with the 6 speed transmission.

Thanks!

***Longshot270*** · #7 Thu, May 6th, 2010, 04:52 PM

I would definitely get a regear with the 4.56 gears since it has been working out for most vehicles. I'm not sure what your truck came with (I dont think they changed anything though) but look around and find a ratio that will bring it to a little bit (and I mean a little bit) higher than stock. All the regear does is bring the final ratio back to what it should be so it doesn't matter what your transmission is. When you regear the driveshaft and everything ahead of it should be turning at nearly the same speed as it was before the bigger tires.