I did some lookin around on the forum and really havent found the answers I was looking for. Sorry if this came up before. But I just wanted to know the rpms at different speeds with different gear ratios w/ 35's. Example:

Ratio:____ Speed:____Rpm's:____

I would like to know for speeds of 45mph, 55mph, and 65mph.

I really need to gear up from the 4.10's so i was thinking 4.88's or 5.13's? or something close to 4.88's.

Thanks

 

Use this calculator: http://www.4lo.com/calc/gearratio.htm
Plug in .69 for trans ratio for an automatic and .84 for a 6 speed. For the transfer case ratio plug 1 in. For your 35's 34.5" should be about right. Then plug in your MPH and gear ration and hit calculate; you'll have your rpms. Piece of cake. And be sure to bookmark the link.

 

Or you could just ask someone.
5.13's AT 35 Goodyear MT's measuring about 34"
45mph- 1600
55mph 2000
65mph 22-2300

The weight you're carrying and the OD make quite an impact on the RPM.

Hey Chuck, seven days until Moab!

 

I thought you had 33s.

 

for sure i know 34.8 with 6speed and 5:13's = 3000 rpm at 72mph

 

Tom, 7 days is right! I'm really, really looking forward to it. I finally got the email from Rachel and it looks like we have the full five. Is Joan coming? Mary is and she's looking forward to it. Hope we get to do some tough stuff.

 

When you plug in .69 is that for overdrive on or off?

 

.69 would be OD. 1:1 is D anything lower than a 1 would be an overdrive ratio. make sense?

 

lol duhhh....no i feel dumb. That makes perfect sence. Thank you