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Go Back   Hummer Forums by Elcova > Hummer H3 Discussion Forums > Technical Discussion and Customizing your H3

 
 
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Old 06-14-2007, 02:09 AM
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marin8703 marin8703 is offline
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Default Re: Just Installed My Re-Programmed PCM

Quote:
Originally Posted by SHYANNE
So if you are running 35 toyos does the shifting so much up and down by it self stop and shift more like it did before i put the 35 tires on it ? and does the gas mpg i lost from going to 35 tires go back to more mpg like it was ?

from what i have noticed it seems to shift like it did without the 35s. still if you step on it a lilttle more it will downshift. if going up a moderately steep hill and you wana keep speed it will downshift.

suposedly your mpg should go up, i couldnt tell because i didnt get a mpg reading with the 35 without the pcm. but the numbers im getting now are comparable to before i got 35s, maybe .5 to 1 mpg less, maximum.
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