4.77 gears
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to be honest, i love the combination of the sound of the gears and my invidia.
and again some get even less gear whine than me, or in different mph spectrums. all depends on the install.
and again some get even less gear whine than me, or in different mph spectrums. all depends on the install.
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Originally Posted by Highrpmek,Apr 30 2005, 08:49 AM
A while back, (year maybe?) someone researched final drive gearsets and came across a lot of information about aftermarket gears being made by Kia and Mazda. Didn't someone go straight to a Kia dealership and get a steal of a deal for the gears? Just curious to know if this is still the deal.
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From: Vegas baby!!
Originally Posted by Highrpmek,Apr 30 2005, 07:49 AM
A while back, (year maybe?) someone researched final drive gearsets and came across a lot of information about aftermarket gears being made by Kia and Mazda. Didn't someone go straight to a Kia dealership and get a steal of a deal for the gears? Just curious to know if this is still the deal.
https://www.s2ki.com/forums/index.php?showtopic=182172
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From: knoxville, TN
Originally Posted by Wisconsin S2k,Apr 29 2005, 07:14 PM
Moving to S2000talk.
The 4.57 gearset is made by richmond. a large part of "why" they whine, is they are made of a harder material. even if installed perfectly, you'll get some whine. the way it was explained to me was since the metal is not as soft as stock or the 4.77 for example, a bit of resonation occurs from the movement of the ring and pinion gear meshing together.
I have them and the whine is perfectly bearable for me, and my girlfriend never complains either. it's also softer at certain speeds, and non-existent above 75mph or below 35mph.
the 4.77 is a kia gear that happens to fit our cars, but is made for a 170hp kia spectra. IMO, not what I want to put into my 240hp S2000.
The 4.44 gears are made for the miata, but the world supply of them is pretty much depleted.
The 4.57 gearset is made by richmond. a large part of "why" they whine, is they are made of a harder material. even if installed perfectly, you'll get some whine. the way it was explained to me was since the metal is not as soft as stock or the 4.77 for example, a bit of resonation occurs from the movement of the ring and pinion gear meshing together.
I have them and the whine is perfectly bearable for me, and my girlfriend never complains either. it's also softer at certain speeds, and non-existent above 75mph or below 35mph.
the 4.77 is a kia gear that happens to fit our cars, but is made for a 170hp kia spectra. IMO, not what I want to put into my 240hp S2000.
The 4.44 gears are made for the miata, but the world supply of them is pretty much depleted.
Are the 4.57 gears stronger...sure. Do you need that extra strength for NA car? doubt it. The 4.77 are just fine. I've had mine for over a year and have had no problems.
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[QUOTE=tenblade2001,Apr 30 2005, 12:56 PM] You've mentioned this point before, implying that the gear (who happens to made by the same manufactures as the gear for the Kia) is weak and prone to break. The fact is there hasn't been one NA 4.77 gear that failed. There may have been a problem with installation, but there hasn't been a problem directly attributable to the gear.
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Hopefully someone getting gears would be smart enough to cryo treat them..point#1. Second, if someone is going FI, then 4.77 is shaky (at best) and I agree the 4.57 are the better option. However, regarding failures with the 4.77, there have been failures will ALL gears and its usually do to bad installation. There isn't one instance, to my knowledge, where the gear itself has been the problem. As far as driving hard, I drive the hell out of my car and clutch drop (not frequent, but I do) and again, have not had a problem. Also, Italian Buckwheat drags his car all the time (he has NOS and gears) and hasn't had a problem.
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From: Milwaukee Area
[QUOTE=tenblade2001,Apr 30 2005, 06:45 PM] Hopefully someone getting gears would be smart enough to cryo treat them..point#1. Second, if someone is going FI, then 4.77 is shaky (at best) and I agree the 4.57 are the better option. However, regarding failures with the 4.77, there have been failures will ALL gears and its usually do to bad installation. There isn't one instance, to my knowledge, where the gear itself has been the problem. As far as driving hard, I drive the hell out of my car and clutch drop (not frequent, but I do) and again, have not had a problem.
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