3.31 vs 3.73 gear ratio

[Dice Roll]

10-4

 

[shane_th_ee]

U know what. You are probably right. I did a quick check on the Ford website originally. Thought I grabbed the right info. Next time, I will grab links the first time. I only want to help.

Good on you. It takes real courage to say “I was wrong”.

 

[Expedition Dave]

Has anyone developed lower gears yet as a privately installed option?

 

[Plati]

Has anyone developed lower gears yet as a privately installed option?

Yes, anyone who put on oversized wheels did that.

 

[Expedition Dave]

Yes, anyone who put on oversized wheels did that.

So who is making them for the 4rth Gen Expy?

 

[JasonH]

So who is making them for the 4rth Gen Expy?

Haven't confirmed, but based on research I did a few months ago these two are aftermarket mechanical LSDs that should fit.

Eaton Detroit Truetrac - 913A477
Powertrax - GT109734

 

[Expedition Dave]

Are we talking ring and pinion here? I was asking about gears?

So who is making them for the 4rth Gen Expy?

Q= Is anyone making front and rear gears for the 4rth Gen Expedition--higher than 3.73s such as 4.11s, 4.56s, etc.

 

[Fozzy]

Unless you’re running 40’s why would you need anything lower than 3:73’s? Do we know if the Expy has the 8.8” front and rear or 8.8” front, 9.75” rear? Or something totally different? If it uses either of these diff’s I have seen as low as 4:88.


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[Rossue]

Did not realize my Expedition SWB 4x2 would have been 3.15 had I not opted for HD Tow. My Yukon had 3.42; I would've been bummed! Was going that route over interior color option, then at last minute found one w/HD tow at another dealer for $500 more with black interior. We bought this specifically to tow with and even though the trailer is only 4300#'s loaded the get up and go for entering highways, etc. is fantastic.
https://media.ford.com/content/dam/...020/expedition/2020-Expedition-Tech-Specs.pdf

 

[Expedition Dave]

Foz, I am bumping up 2 tire sizes to 34.3s, raising her up in height, and adding additional bolt on weight.

So, depending on my ultimate future plans may want to match--or even lower slightly, my final drive and crawl ratio.

It depends on the $$$ cost for the swap as well.

 

[10sne1]

Best of both lower and higher gear. The 2017 shorty 4 x 2 HD tow has a 3.55. Looking to buy this week!

 

[shane_th_ee]

Best of both lower and higher gear. The 2017 shorty 4 x 2 HD tow has a 3.55. Looking to buy this week!

That payload though...

 

[10sne1]

Payload 1400 something, but did not buy as change of heart. Holding out for an El.

 

[JExpedition07]

No 3.55 on any Expedition I’m aware of. The 5.4L came with 3.31 or 3.73. The 3.5L came with 3.15, 3.31, or 3.73.

3.55 is an F-150 ratio (all engines). You could also get 4.10 with the 6.2L only. But 3.55 and 4.10 never have been available on the Expedition.

 

[JasonH]

For anyone who's curious, the towing guide has all the available drive ratios listed and is widely available via Google search.