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12.34MPG with 4.0


1989Bii

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Does that sound about right with 33's and a 4.0?
 


4.0B2

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what gear ratio? auto or manual? is it running good and smooth? right psi of fuel?
 

Hahnsb2

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Gears? Kind of driving? I've gotten significantly worse than that (9.5MPG) and better (15+MPG), depending on where and how I'm driving.
 

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have you corrected your odometer after the tire change?
 

1989Bii

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Its a stock dana 28 from 89 so i guess it would be 410's. The transmission is auto and i'm driving it 55 miles exactly on the highway. I measured the distance using another car, my trip is still wrong cause of the 33's.
 

4.0B2

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if your trip is wrong, its hard to calculate exact mileage. unless you do NOTHING but 55 miles a day....
 

1989Bii

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What i did was, i filled it up before i left. I drove 55 miles EXACTLY, then filled the tank back up and divided the miles by the amount of gas i used and then i got 12.34. 12.34 is what it is getting highway, all im asking is if this is normal or should i be getting more?
 

Hahnsb2

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Its a stock dana 28 from 89 so i guess it would be 410's. The transmission is auto and i'm driving it 55 miles exactly on the highway. I measured the distance using another car, my trip is still wrong cause of the 33's.
Auto combined with 4.10s isn't enough gear, you need 4.56s.
 

1989Bii

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What are you getting with the 4.56s highway?
 

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talked to a guy getting 16.5 or so with 33's and 4.56's with the a4ld..
if i can pull that off i'll be happy lol


edit: his 33's are bfg at's.. btw
 

Hahnsb2

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What are you getting with the 4.56s highway?
Like 14, but I do 70+ and I'm turning heavy and aggressive super swampers.
 

1989Bii

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well i guess i'll need to save up for some gears. Thanks for the input btw!:headbang:
 

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Auto combined with 4.10s isn't enough gear, you need 4.56s.
I would like to point out that we don't KNOW that he has 4.10s. 3.45 was a much more common ratio that year.
 

country0001

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I would like to point out that we don't KNOW that he has 4.10s. 3.45 was a much more common ratio that year.
I agree, I was thinkin 3.73's. That's what my 90's have.
 

Hahnsb2

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I would like to point out that we don't KNOW that he has 4.10s. 3.45 was a much more common ratio that year.
Has nothing to do with year, if it was a factory auto, it should either be 3.73s or 4.10s, and it's a moot point, because it still needs 4.56s gears, which we know it doesn't have.
 

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