whats up guys,already had to get a new clutch in the mustang the tob went out and messed up my clutch,$511,dam stang,well my friend has some 390 gears that will fit my stang,he's selling them for $90,a steal,My questions is,how bad will they effect my mpg,What performace gains can i expect and will the car still be a good daily driver,how do gears work,Im a noob when it comes to gears,but it seems that anyone with a stang puts on gears,oh they are motive gears,still in the box,websites say to expect 1/2 a sec faster in the 1/4,thanks
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390 gears
2000 blue mustang gt vert 5spd,18''cobra rims,light bar,stalker bodykit,lowered 2 1/2'',roush side exhaust /with x pipe ,bbk cai,power products 75mm tb and plenum Pro 5.0 3:90 gears,Custom 91 octane SCT tune
2000 red vw jetta,86k stock
1995 firebird formula ws6 clone,crashed,frame damage ,soldTags: None
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What's your overdrive gear ratio? I lost 1-2 mpg going from 3.23 stock 10 bolt to a 9" with 3.50. I went from 20-18 mixed freeway/city. That's with a .7 overdrive.
But now, I'm at 12-14, which is pretty bad.94 Black T/A GT, Advanced Induction 355, 3200 stall, built 4L60E, Moser 9", Baer Brakes, Shooting for 11s...
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Originally posted by Craig 94 TA GTWhat's your overdrive gear ratio? I lost 1-2 mpg going from 3.23 stock 10 bolt to a 9" with 3.50. I went from 20-18 mixed freeway/city. That's with a .7 overdrive.
But now, I'm at 12-14, which is pretty bad.2000 blue mustang gt vert 5spd,18''cobra rims,light bar,stalker bodykit,lowered 2 1/2'',roush side exhaust /with x pipe ,bbk cai,power products 75mm tb and plenum Pro 5.0 3:90 gears,Custom 91 octane SCT tune
2000 red vw jetta,86k stock
1995 firebird formula ws6 clone,crashed,frame damage ,sold
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So you have a .67 overdrive and currently have 3.27 rear end. I'd guess going to 3.90s would decrease your mileage by 3-4 mpg, or maybe 10-15%. That's a rough guess based on my gear change.
By the way, what happened to the Bird? I haven't been on for a while. Hope you still have it along with the Mustang.94 Black T/A GT, Advanced Induction 355, 3200 stall, built 4L60E, Moser 9", Baer Brakes, Shooting for 11s...
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GF wrecked it, frame damage,
what performace gains would I see
http://s198.photobucket.com/albums/a...t=100_0483.jpg2000 blue mustang gt vert 5spd,18''cobra rims,light bar,stalker bodykit,lowered 2 1/2'',roush side exhaust /with x pipe ,bbk cai,power products 75mm tb and plenum Pro 5.0 3:90 gears,Custom 91 octane SCT tune
2000 red vw jetta,86k stock
1995 firebird formula ws6 clone,crashed,frame damage ,sold
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Oh man, sorry to hear that
It's all guesses for me because I'm not that familiar with Mustangs. I'd guess .2 in the quarter mile because the 4.6 torque peak is at higher RPM and would probably like the higher revs with the gear change.94 Black T/A GT, Advanced Induction 355, 3200 stall, built 4L60E, Moser 9", Baer Brakes, Shooting for 11s...
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if the torque comes in at a higher range, then he shouldnt loose that much. i went froma 3.08 to a 3.42 rear in my old bird and saw a 2-3 mpg improvement on the highway and bout a 2 in the city, and that was with it running a constant 12:1 AFR.2009 Honda Civic EX- the daily beater
old toys - 1983 trans am, 1988 trans am, 1986 IROC-Z, 2002 Ram Off-Road, 1984 K10, 1988 Mustang GT, 2006 Silverado 2500HD
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i'd never put used gears in my ride. initial set up is too critical to noise and longevity. every pumpkin is different slightly inside.... and motive uses a bias gear pattern set up.
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