Rear Axle ratio?
#13
#15
I am assuming that you want to change the settings in the ecm so that you show the correct speed on your speedometer after changing gear ratios. You have a pre obd II vehicle which means that in order to change that setting you would need to speak to someone from a dealer or other competent shop that has that information on how to flash your ecm with the correct information. It is obviously changeable since these trucks came with different ratios in model years. Hope that helps somehow.
#16
Mr. eatinchevydumpinford, no offense, but you need to look at the dates of the threads. This thread has been done for over a month. I highly doubt the OP has been back since, otherwise he would have posted.
Second, I'm by no means an expert, but I don't believe our sensors/computers need any recalibrating for different gear ratios. Different sized tires, yes, different gear ratios, no. I'm not sure on the specifics, but thats how it was explained to me. Someone correct me if I'm mistaken.
#17
Second, I'm by no means an expert, but I don't believe our sensors/computers need any recalibrating for different gear ratios. Different sized tires, yes, different gear ratios, no. I'm not sure on the specifics, but thats how it was explained to me. Someone correct me if I'm mistaken.
Last edited by Hahns5.2; 06-15-2009 at 01:38 AM.
#19
Mr. eatinchevydumpinford, no offense, but you need to look at the dates of the threads. This thread has been done for over a month. I highly doubt the OP has been back since, otherwise he would have posted.
Second, I'm by no means an expert, but I don't believe our sensors/computers need any recalibrating for different gear ratios. Different sized tires, yes, different gear ratios, no. I'm not sure on the specifics, but thats how it was explained to me. Someone correct me if I'm mistaken.
i would think that changing the gears would have a similar impact on the speedo as larger/smaller tires just because its either more or less revolutions of the drive shaft depending on which ones you get, but they wouldn't be huge differences, just a little less or a little more power and maybe 1/2 mile off on the speedo. but i'm no expert so don't burn me up if i'm wrong, i'm just giving my opinion.
how come every time someone asks about gear ratios, somone mentions the sticker on the bottom of the hood but no one ever mentions the sticker on top of the axle tube next to the leaf springs?
#20
i would think that changing the gears would have a similar impact on the speedo as larger/smaller tires just because its either more or less revolutions of the drive shaft depending on which ones you get, but they wouldn't be huge differences, just a little less or a little more power and maybe 1/2 mile off on the speedo. but i'm no expert so don't burn me up if i'm wrong, i'm just giving my opinion.
I've had a speedometer that was 25% off before in my B2 from a combination of gear change, tire change and transfercase change (different speedo drive gear in the t-case).