2nd Gen Non-Engine/Transmission New rear end ratio with 285 tires ?

[BILLVO]

Pete to answer your question.



Yes you are dead on with your figure.



this is one of many sites that can help.



http://www.4lo.com/calc/geartable.htm



You will be fine. you will not notice a real power difference. Shouldn't hurt milage,when I ran them it actually helped about +. 5 mpg.

 

[pete97]

Thanks for the info. Pete

 

[HerbW]

Another question to ponder about the big tires and gear ratio.

Can tmy 98 12 valve truck be reprogrammed to correct the speedometer to real speed/mileage? In the old days it was a gear change out. Now I hear it's a program in the ECM. Any advice is appreciated. Herb