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TECH SPECIALIST
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Discussion Starter · #1 ·
That POS sloppamatic tranny I had.

With the auto I consistently got 12 mpg, regardless. Every fillup my mileage was always in the 12's. ALWAYS. With the fuel prices I drove it as easy as I possibly could to get the best mileage. 12 was the best I could do.

Now that I have swapped to the manual my mileage has taken a drastic increase. I filled it up today, and got 18.71 mpg. Yes, nearly a 7 mpg gain. I do not drive it very easy now with the manual, its too hard when you have the power there in each gear.

I rarely drive highway. This is all city/country driving.

I think I can do even better, because I still have a small leak somewhere when the engine is working hard, such as towing heavy or really into the throttle. Anytime I have a trailer hooked to it I can smell diesel fuel and its sprayed on the trailer. It's not leaking a lot, but any leak is too much as high as fuel is. I just can't find the leak.

But anyway, I could NOT be any happier with the new manual tranny. :woot::thumbsup
 

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found my problem too. at least there was a fix for yours. glad it worked out for the best:thumbsup
here's my trouble

 

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Premium Member
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dodgecummins98 after we get you that adrenaline you mileage should be even better if you can keep from rolling to much coal out them stacks.

Tyler
 

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T-BONE
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987 Posts
Congrats on the better fuel mileage...Manual is the only way to go...IMO. NMMEGA, I hae the same problem. My Dad used to always(and sometimes still does) tell me, Im goin to cut some of that big foot off so you'll slow down....LOL. Let me know if you find a fix for it....
 

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found my problem too. at least there was a fix for yours. glad it worked out for the best:thumbsup
here's my trouble

LMAO:rof too funny
 

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Yes, please tell us how hard the manual swap was!! Ive been thinking about doing it myself. I figure its gonna cost about the same to swap to a manual as if will to buy a Goerend, and I get a 6-speed.
 

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Yes, please tell us how hard the manual swap was!! Ive been thinking about doing it myself. I figure its gonna cost about the same to swap to a manual as if will to buy a Goerend, and I get a 6-speed.
Me too....i want to really know . please let us know.:thumbsup
well actually i don't care how hard it is , just wanted to know how much it is.
 

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Discussion Starter · #10 ·

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Between a G56 manual and auto transmission there shouldn't be any MPG gains.

I would almost bet a months wages you had a bad ECM or PCM or both. Changeing out the electronics is more than likely what gave you better fuel mileage.

In any respect it's good to hear you gained fuel mileage.
 

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found my problem too. at least there was a fix for yours. glad it worked out for the best:thumbsup
here's my trouble

Holy crap, shave off some of that hair and you'll probably gain alot of fuel mileage. :rof
 

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TECH SPECIALIST
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Discussion Starter · #13 ·
I didn't change any of the computers. But as I understand it without the auto I do not even need the PCM anymore. So I guess possibly the pcm may have been bad? I hadn't thought of this.
 

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PWR2TOW,

am i really missed?

ronsram1999, bluebull, I'll miss yah man.





Ed
 
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