how to lower rpm range Options

[eldrewado]

hello all, im new here. im looking to save more gas with my 99 gt. i was wondering if there is another differential i could use to lower my cruising rpm.
if i want more power ill leave it in 4th gear. 3000 revs at 60 mph or so seems a little high, granted its good for power.


anyone have any ideas?

[Special_Edy]

Im sure you could either buy or fabricate an adapter for the vehicle speed sensor(located on top of the rear of the manual trans. above the axle shafts). All you would need to do is alter the frequency that the speed sensor pulses.
Im sure some of the guys on the forums have the electrical experience to tell you how to design something like this.
All that said, its much more feasible to throw some 16 or 17 inch wheels with some larger diameter tires and buy/make a speed sensor adapter than try to swap transmission or final drive gears. Plus it would look good on a 6gc to have a little extra meat in the wheel well