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Gear Ratio Guide for Larger Tires 65MPH, Gear ratios and Tire size Rate Topic: 1 Votes

#1 Onkover

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Posted 24 August 2004 - 03:21 PM

Have you installed larger tires and lost power? Have you wanted to find out what gears you need to get that hard earned power back. Or maybe you just want to see what your RPM's would be like with a bigger or smaller tire. I have the chart for you. This is a word document.

Attached File(s)

Gear_Ratio_Guide_for_Larger_Tires.doc (131K)
Number of downloads: 527

This post has been edited by Onkover: 31 January 2005 - 08:10 PM

Useless text that your reading for at least the first time.

#2 JonsYJjeep

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Posted 24 August 2004 - 04:54 PM

good chart thanks for that :thumbsup:

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#3 Onkover

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Posted 28 August 2004 - 07:48 AM

Glad to have been of service. :cool2:

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#4 ben

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Posted 03 November 2004 - 09:11 AM

JonsYJjeep, on Aug 24 2004, 05:54 PM, said:

good chart thanks for that :thumbsup:

#5 Rockinelle

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Posted 31 January 2005 - 12:25 PM

Hey Onk, this attachement seems to have gone by-by. Can you edit your post and reupload it? Thanks

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#6 Onkover

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Posted 31 January 2005 - 08:11 PM

Done E. IT had 44 downloads and has been reposted. It is in Word format and should be accessable to everyone. Please let me know if anyone has a problem retriveing it.

Useless text that your reading for at least the first time.

#7 Boodlum

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Posted 18 February 2005 - 11:10 AM

Ok I thought that would be somewhat useful, but who takes there 4x4 up to 65 mph? ok maybe the bigger jeeps, but really the taller you go the scarier high speed becomes.

If I knew what I know now, Id know no more than I know already

#8 86 Grand Wagoneer

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Posted 18 February 2005 - 11:30 AM

:headbanger: I do 70 on the highway all the time in my Toyota! :thumbsup:

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#9 Rockinelle

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Posted 18 February 2005 - 01:36 PM

I will do 7-75 in my XJ. It's not very comfortable because with the lift, I don't really have any caster left. When I swap in my 44, I will position the pinion where it will ly and then set the caster which will make hwy driving more comfortable again. I guess I'm just used to driving a tall vehicle. I brake sooner than normal and I go around corners a lot slower than I do my car. The 4x4s that drive slow on the hwy are the ones geared really low and their turning a lot of RPM.

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#10 NZ

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Posted 13 November 2005 - 01:36 PM

65 MPH, thas nothing, i can, and regularly do 80 MPH in my MK and it has full offroad tires.

It is #### scary though!!!!

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#11 rwilley

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Posted 13 November 2005 - 05:48 PM

I do 75 mph in my cruiser and it's not scary. I'd go faster but the speed limit in CA. is 70mph on the freeways. I would'nt corner at those speeds tho. :dead:

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#12 jeeprat

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Posted 27 August 2006 - 10:49 PM

Great chart. Just one question if you don't mind. How much RPM variance would there be if, instead of a 4 speed, the transmission was the 6 speed being sold in the Unlimited Rubicon? The tires are 31" and the axles gearing is 4:11.

Thanks,
Rick

#13 Rockinelle

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Posted 28 August 2006 - 08:26 AM

It's assuming your in a gear where the ratio is 1:1 which is usually 4th. If that's different in your rubi, this chart will apply to whatever gear this is true for.

I drive an 87' XJ.
I have a photoblog at EricLeslie.com

#14 Onkover

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Posted 29 August 2006 - 03:14 PM

Check your RPMs at 60MPH and compare that to the chart. The adjustment you need can be discovered this way also. Still I think Eric is right on the money.

Useless text that your reading for at least the first time.

#15 Kimber

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Posted 13 May 2007 - 09:46 AM

OMG I was just talking to eric about this too!!! I don't think I'll ever use 5th gear again unless on the free way but i'm going to have to re-gear down the road cause i'm going soooooo much slower that i'm actually saying words of encouragement trying to go up hills at a halfway decent speed lol

#16 MOTOGIZZI

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Posted 31 May 2007 - 10:45 AM

hey thanks for the chart i have been trying to figure out what gears to get! i have a question though i have 315/75 tires 3.73 gears(dana 60) and i am at about 2800 at 70 ish (havn't regeard the speedo yet) in 4th, OD off, converter locked? is there a difference in the axle swap or something i am missing 4th is 1:1 and the tags say 3.73 tires 315/75??? i was thinking about going to a 4.56 but i am hesitating now???

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#18 Onkover

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Posted 10 August 2010 - 08:59 AM

Where's the off topic cop when you need one?

Useless text that your reading for at least the first time.

#19 rsc71

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Posted 10 August 2010 - 02:59 PM

Onkover, on 10 August 2010 - 08:59 AM, said:

Where's the off topic cop when you need one?

he quit :P hows it going?

#20 rwilley

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