6.14 and 6.17 gear ratios

[CDA 455 II]

Academic question:
Are these gear ratios too far apart to be used together?

The 6.17 being in a front Dana 60/6.14 in a rear Dana S135


Intended vehicle: 2021 Ford F-600

 

[Aisin]

No considering you won’t be running on dry pavement with hubs locked

 

[Rangerrod]

Mathematically they’re only 1/2% apart. Most say 10-15% is max. You won’t even notice.

 

[Bebop]

No, i'd run that combo no problem.

 

[mudtoy67]

Mathematically they’re only 1/2% apart. Most say 10-15% is max. You won’t even notice.

+/- 1% is the standard.

Never heard 10% before. That would suggest it’s ok to mix 4.56 and 4.10 gears.

 

[I Lean]

Is that a HP60 like the rest of the Super Duty trucks? If so, I don't think 6.17 is even an option.

 

[Weasel]

I read 5% before when I was looking.

I wouldn't worry bout it

 

[total newb]

.03 is just fine

 

[boardbysled]

You'll be fine. I've run 4.56 and 4.63 ratios for 10 years and even in 4low, both axles locked, turned full lock I couldn't notice it on dry pavement.

 

[YotaAtieToo]

As mentioned, that's no where near enough to worry. No matter what the surface is.

There was another thread about this recently.

Also, 6.17s are not available for Hp60s fwiw.

 

[arse_sidewards]

There's millions of TTB F150s and Broncos driving around with 3.05/3.08 which is a substantially greater difference than 6.14/6.17

 

[Levigarrett76]

Many fords with 9” rear had 3.50/3.54 no problem

 

[Grendel]

The gear difference is intentional, so the front pulls (and steers better than) the rear. At least, that's the thought I quasi remember on the old board.

 

[SLOWPOKE693]

The gear difference is intentional, so the front pulls (and steers better than) the rear. At least, that's the thought I quasi remember on the old board.

My SxS is set up like that just for that reason.