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Old 10-19-2011, 04:36 PM   #17 (permalink)
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Join Date: Jul 2008
Location: UC Berkeley
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[SOLD] Highway Warrior - '00 Mazda Protege LX 1.6L Manual
90 day: 35.93 mpg (US)

Basic Miata - '06 Mazda Miata Touring
90 day: 30.93 mpg (US)
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Quote:
Originally Posted by d0sitmatr View Post
that 3.7 from a 4.1 wont gain you a whole lot. whether the cost is worth the reward is up to the individual at that point. but I dont think it would be as expensive as you think to replace. the pumpkin itself should be a straight swap, so your cost would mostly come from buying/shipping it from AU. that WILL be pretty expensive, that is for certain
Yeah, I agree. I'm not sure how many of these are available either, I started a WTB thread to see if anyone is interested in selling one of these differentials.

Quote:
Originally Posted by d0sitmatr View Post
the Miata has a HUGE fanbase, so Im guessing there should be tons of resources out there.
True. My car has an 0.814 5th gear. I started a thread about 5th gear swaps in the Miata forum, and it seems that there are other cars that I could pull a taller 5th gear from. For example, the 87-91 RX-7 has a .691 5th gear. Perhaps Mazda still makes that part. However, if the part is discontinued, I would have to pull a used one from a 20+ year old, possibly abused, sports car transmission. I'm not sure if I'd feel comfortable putting a 20-year old used part into my newish car's transmission.
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