Gear ratio advice???

[ExplorerJimbo]

yeah. i THINK i know that commercial..

 

[Racerx70]

That seems like a lot of rpm's with a 3.50 and 35's........2500 to 2700 at 55 to 60?

I would think with a true 35's and 3.50 gears you would do around 2200 at 65. Just found out it has the same ratio gears as a c4 according to Advanced adapters chart which is 1 to 1 in 3rd.

C4 and C6's don't have lockup converters. You'll always run 3-500 RPM higher than a chart, Depending on what kind of converter you're running.

 

[CDW6212R]

Multiply the 33/30(16"stock tire) by the 3.73, and you should use at least a 4.10:1 gear. If you had 15's to start with, then 4.30:1 gears would more closely match your original gearing. If your tires weigh more than the originals, and they do, then go up at least one more ratio step. 4.10:1 gears are common in the 16" tire'd Explorers.

Depending on what fuel mileage you expect, versus the acceleration you want, choose 4.30's or 4.56's. Good luck,

 

[Brian_B]

To go along with what CDW wrote: My explorer came factory with 255/70/R16s. They are approximately 30" X 10" and it has 4.10 gears. My old ranger came with 215/75/R15s and had 3.73s. With 33s, these guys know what they are talking about..go higher numericallly (lower gears).

 

[leetz]

I run 4.56 with 33's and am very hapyy with it

Same. Truck hauls ass....... stomped many ricers in my day.

 

[351wExplorer]

im not 100percent positive on the speeds because i have no speedo. thats just the flow of traffic, and id think that the flow of traffic would be around 55-60... yeah right who am i kidding?!?! i am certain though that they are 3.50s and 315/75/16s

 

[ericradford01]

hey man i guess i can help a bit .. i have your 33x12.5 KUMHO MTs with stock 3.73... they dont seem that bad but def will change in the future ive ran that way for the past 2 months no problems... but speedo problem is sovled by my simple little mathematical mind haha. for every 10 mph you go it goes up 1 mph so if your going 30 ...your going 33 if your going 70 your going 77 thats the way i calculate it. i found a site that helped me out with that and thats what the dealer said it would be if i dont speedo correct. anything else let me know i think that might help you a bit.

 

[ericradford01]

hey just wondering also.. with 33s which gears would be better on gas mileage... 4.10 or 4.56s? just think that might be a good thing to think about before a purchase ... id like to know my self...

 

[appx91]

37's and a 700r4 and POSSIBLY going with a d300 what ratio do you guys think? sorry to hijack the thread!

 

[dreamr]

37's and a 700r4 and POSSIBLY going with a d300 what ratio do you guys think? sorry to hijack the thread!

I'll make a shot in the dark with 4.88's

 

[appx91]

I was kind of leaning that way anyone else?

 

[mitch]

31&32s 4.10, 33-35 4.56, 35-39 4.88, 40> 5.12

 

[351wExplorer]

what about with a three speed tranny......specifically a c6.... and a 351w with 315-75s

 

[ericradford01]

hey mitch thanks for the advice... im sure that helped alot more than me