Gears & Axles - changing gears what should i expect

04-09-2009, 04:18 PM
i am changing my gears out of 2001 z2 automatic from 2.73 to 3.42's. I have a trex cam and stage 3 heads with 1 7/8 longtube headers or y-pipe to a 3 inch cutout, ls6 intake 80mm tb, 36lb injectors and slp lid. what kind of difference in these gears will it make?

04-09-2009, 04:28 PM
you'll be faster! quicker out the hole, go through the gears faster, higher cruising rpms, less gas mileage on the highway, speedometer will be off unless you can change that in the computer.