my 92 came with 3.27 stock so i couldnt tell you if there will be a really big kick.
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the guy i bought my car off of, had 2.73's in it when he got it and said that he could top out the speedo in 2nd. it has 3.27's in it now and i have to grab 3rd to top the speedo out (85mph) now. not much help but just to give you a rough idea of what your looking at, 4th in mine will bounce the speedo peg off the trip reset. and i don't think you will see a big diff. in gas mileage.
Hey everyone. My father is looking to make this gear replacement (2.73 to a 3.27) on his 98' Mustang. He's curious how to set it up, how to shim it, torque specs, all that good stuff. Anyone know, or know where we could find that information online or elsewhere? What else should he watch for/make sure to do. It's a 7.5 rear axle if that helps. He said he's done one before but it was a long time ago. Any written instruction to jog the memory would be great.