2.62 To 2.75 Gear Ratio Report - BMW Luxury Touring Community
 
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post #1 of 12 Old Aug 10th, 2014, 6:21 pm Thread Starter
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2.62 To 2.75 Gear Ratio Report

I have been through 3 tanks of gas since I changed my 2004 LT to the 2.75 final drive gear ratio. I never use the BC to calculate my gas mileage. Dividing miles by gallons I am getting 3.5 miles per gallon better with the 2.75 ratio. It also has a little better acceleration feel on the throttle response. I now get the same gas mileage with my 2004 LT that I get with my 2000 LT. I'm getting 50 mpg now with the 10% Ethanol fuel with both of my LT's.

Dave Selvig
2004 Black LT
2000 Canon Red LT



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post #2 of 12 Old Aug 10th, 2014, 6:50 pm
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Re: 2.62 To 2.75 Gear Ratio Report

I bet Dave you are not going over 80+ MPH to get that kind of milage its more like something like under 60 and not hammering to hard on it like real easy on the thortle But that just not sound like you being easy on that beast

Gary
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post #3 of 12 Old Aug 10th, 2014, 7:19 pm Thread Starter
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Re: 2.62 To 2.75 Gear Ratio Report

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I bet Dave you are not going over 80+ MPH to get that kind of milage its more like something like under 60 and not hammering to hard on it like real easy on the thortle But that just not sound like you being easy on that beast
I'm very easy on my LT's unless I'm being chased in the mountains.

Dave Selvig
2004 Black LT
2000 Canon Red LT



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post #4 of 12 Old Aug 11th, 2014, 4:40 pm
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Re: 2.62 To 2.75 Gear Ratio Report

I'll second that mountain chasing.

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post #5 of 12 Old Aug 11th, 2014, 4:54 pm
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Re: 2.62 To 2.75 Gear Ratio Report

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Originally Posted by saddleman View Post
I have been through 3 tanks of gas since I changed my 2004 LT to the 2.75 final drive gear ratio. I never use the BC to calculate my gas mileage. Dividing miles by gallons I am getting 3.5 miles per gallon better with the 2.75 ratio. It also has a little better acceleration feel on the throttle response. I now get the same gas mileage with my 2004 LT that I get with my 2000 LT. I'm getting 50 mpg now with the 10% Ethanol fuel with both of my LT's.
What year did they change the ratios?

thanks...Randy
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post #6 of 12 Old Aug 11th, 2014, 6:18 pm
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Re: 2.62 To 2.75 Gear Ratio Report

I gotta stir the pot though. How are you calculating your actual mileage ridden? Changing the ratio changes the total miles indicated. Just curious if you adjusted for that?


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post #7 of 12 Old Aug 11th, 2014, 6:30 pm
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Re: 2.62 To 2.75 Gear Ratio Report

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I gotta stir the pot though. How are you calculating your actual mileage ridden? Changing the ratio changes the total miles indicated. Just curious if you adjusted for that?
I thought the LT used the ABS ring for speedometer and odometer input...

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post #8 of 12 Old Aug 12th, 2014, 5:54 pm
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Re: 2.62 To 2.75 Gear Ratio Report

And I'm gonna stir some too.....








Did that fix the tachometer issue?

B D R
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post #9 of 12 Old Aug 12th, 2014, 6:37 pm
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Re: 2.62 To 2.75 Gear Ratio Report

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And I'm gonna stir some too.....
Did that fix the tachometer issue?
I think it was the speedometer.
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post #10 of 12 Old Aug 12th, 2014, 6:39 pm
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Re: 2.62 To 2.75 Gear Ratio Report

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And I'm gonna stir some too.....








Did that fix the tachometer issue?
I think the tach issue was on the Y2K if memory serves

-Steve

2009 BMW R1200RT
2000 BMW K1200LT (was supposed to be replaced by above, but can't keep above running long enough to replace
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post #11 of 12 Old Aug 12th, 2014, 6:41 pm
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Re: 2.62 To 2.75 Gear Ratio Report

Changing FD ratio does not change wheel speed, different wheel circumference would affect speedometer

And who needs a tach anyways

Gary
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post #12 of 12 Old Aug 13th, 2014, 5:38 am Thread Starter
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Re: 2.62 To 2.75 Gear Ratio Report

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Originally Posted by gunny View Post
And I'm gonna stir some too.....

Did that fix the tachometer issue?
On my 2004 with the 2.75 gear the tach. reads like it should.

Dave Selvig
2004 Black LT
2000 Canon Red LT



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