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Originally Posted by Future303
Ok, my 95 GT is stock. I understand that the Diff. Gear is 2.73. I want to go to a 3.73 gear, but I am wondering a few things:
1. Obviously Mileage will decrease, for city driving I don't mind so much, but I do a lot of Hwy driving, and if I'm going at 100km/h (about 65 Miles/h) my RPM is about 1.6k. With the 3.73 what can I expect my RPM to be at?
2. I have to get my tranny rebuilt soon. I understand my 5th OD Gear is a ratio of 0.68:1. Is it possible to replace that gear with a 0:50:1 ratio, to balance out the difference on the Mileage and the RPM's? If I have to get the tranny rebuilt, I might as well try to put in that 0:50:1 OD Gear if possible.
I asked this in another thread but didn't get a reply. If anybody knows I would appreciate the input. Thanks.
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Dude, go for it! I hung on to my 2.93's for the longest time (which in honesty I do miss the 0-80 kmh 1st gear!) but now with the 3.73's its like "WOW". I've got a 4-speed auto so yours being a 5-speed don't worry about it. I used to turn 2100-2200 RPM at 120 kmh, now its about 2500 RPM for the same speed. But before in 4th (OD) the car had no balls whatsoever, now I can actually pass people with relative ease in top gear. The increase in torque multiplication will knock your socks off especially when you shift from 1st to 2nd gear - I couldn't believe the first time I ran it out, the rear wheels squeeled so loud and long (moreso than from a standstill) and you could feel the axle hopping up and down (thats the next thing to break!).
I actually get slightly better gas mileage in the city but ya the highway is worse, although not really that bad unless I'm racing my buddy's Saleen up the 400 to the cottage LOL. If you're actually going to be stuck at 100 kph I honestly don't see mileage being a problem.