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Just drove my 2001 m6 coupe home from Scotty's (my mechanic) with a new 4.1 differential. The daily driver has 214,000 miles on it (all mine) and I wanted a little more "get up and go" that didn't require maintenance. The only performance upgrades I've bolted on is vararam intake. Last year I purchased a COW tune. All were worthwhile, but the love is back with the 4.1.
How bad of an install is a rear gear change? I've got a 2004 base automatic with I believe 2.73's. Diffs seem to be relatively inexpensive used, labor probably costs a bundle though?
I installed a 4.11 in my 1972 454CID 550 HP and it was awesome, but I also installed a Hone Overdrive that would switch it over to 2.87 on the fly. Best of both worlds...
1800 rpm which actually makes 6th gear almost usable!!!
I had a 2000 WS6 M6 with a Moser 12 bolt and 4.10's H/C/I and it turned 1900 rpm at 70 mph. I still got 22-23 MPG on the highway which is good for a car several hundred pounds heavier.
How bad of an install is a rear gear change? I've got a 2004 base automatic with I believe 2.73's. Diffs seem to be relatively inexpensive used, labor probably costs a bundle though?
you have the luxury of so many units out there, 3.90 and 4.10 not so much. if you did just the dif change, I don't think it's a very big deal !!!
I had 4.10 gears on my '80 C3 with the anemic 190 hp 350ci...let me tell you I do recall having one heck of a blast on the streets. Smok'n most everything on the streets. Fun sharing my Corvette's spec's...forgot the mention the gearing...lol.
10-20-2016, 01:35 PM
I'm in love
