2.73's to 3.42's???
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Launching!
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2.73's to 3.42's???
Would it be worth it to swap from a 2.73 to a 3.42? Car is my daily driver and might see the strip once a year. Any opinions are welcome. Thanks.
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I was reading that there isn't much difference in 3.42's and 3.73's so I figured I'd try the 3.42's to save on the gas mileage a little bit. Anybody know what the mpg is with 3.42's on a stock internal f body?
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Well since a lot of f-body LS1's came with 3.42's from the factory, then i'd go off the manufactures listing. I think they were rated like 17-18 city and 26-28 highway. In fact your city mileage may increase a tad with the steeper gear
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that sounds pretty good to me. I see on here all the time about guys getting stall convertors. But it's my DD, stock cam, and I rarely ever launch my car so I don't see where a stall would benefit me any. So I figured some new gears would wake it up and still have the same street manners.
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#10
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i made the swap and it was really nice. I gained a coule mpgs putting around town but on the hwy you will lose some. I cruised at 80 pretty steadily on the hwy since florida traffic moves quick. I used to get 24.5 with the 2.73's doing 2k rpm at that speed when I went to 3.42's it jumped to 2500 and i got 22-23. now with the 6 speed and 3.90s im up around 26 lol
#13
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If you are not a experienced mechanic (and have done it before) then DO NOT do it your self. You have to have a lot of different measuring tools and you have to shim it exactly right. It is worth it to pay to get it done because driving 100yd to a mile can destroy your gears depending on how bad off they are. Been there my self just pay for it. Its not just a pull the old out and slap in the new kind of job.
#14
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Well my dad(mechanic for 30+ years) was gonna help me do it. But I'm not positive if he has all the necessary tools. How much did it cost to get a shop to do it for you?
#15
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I've done it once on a ford rear because it had screw caps instead of shims like the gm does. I didnt do it for my 3.90's because I simply didnt have time, with the right tools and instructions you can do it. you will need an inch lb tq wrench, bearing press, new crush sleeve, bearings, and a dial indicator with a good mount. If you take your time and have some know how it can be done. installs usually run around 300-400 depending on where you are and what they do
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If he is a machanic he can proly do it with limited tools. Just using experience. 300-400$ for a shop to do it. Ask him questions about it I'm sure he knows more about it then many of us.