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Old 09-21-2006, 08:53 PM   #1
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I was reading on the .net about rear ends. A post said 99'-00' cars (non 6-speed) came with a 4.30 rear end. Is this true? Would the rear end be as strong as the torsen? I have no complaints of the 1.6 ratios, I just dont wanna blow it up.
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Old 09-21-2006, 08:56 PM   #2
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if its a 7'' rearend its stronger than the 6''. 7'' rears are in 1.8 cars (open or lsd) and 6'' are in 1.6 cars (vlsd/mazdaspeed ect) Remeber the diff itself is not the weak part, its the ring and pinion gears that go.
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Old 09-21-2006, 09:02 PM   #3
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But do the 99'-00' cars have the 7" with a 4.30 ratio? After reading about 30 threads about rear ends I couldn't find the answer. But I do know about what fails, what years have what. Pretty much everything but the one thing I want to know, go figure
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Old 09-21-2006, 09:03 PM   #4
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my wife's '99 had that.
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Old 09-21-2006, 09:09 PM   #5
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But do the 99'-00' cars have the 7" with a 4.30 ratio? After reading about 30 threads about rear ends I couldn't find the answer. But I do know about what fails, what years have what. Pretty much everything but the one thing I want to know, go figure
You asked if it would be as strong as the torsen...so I answered that part..
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Old 09-21-2006, 09:17 PM   #6
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Yes you did. Didn't mean to imply you didn't answer anything. Sorry. I'm just sort of frustrated from reading so many old threads with the same info in them.
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Old 09-21-2006, 09:48 PM   #7
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Old 09-21-2006, 10:06 PM   #8
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KFJ, you wifes 99' had a 4.30 7" rear end?
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Old 09-22-2006, 12:44 AM   #9
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pretty certain.
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Old 09-22-2006, 08:54 AM   #10
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I wouldn't mind a 4.10 to bring the revs down about 200rpms in 5th gear
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Old 09-23-2006, 12:48 AM   #11
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I rarely drive on the freeway, maybe once a month at most. So I have no complaints with the 4.30. I just want a 1.8 dif to handle the power. But the few times I was on the freeway I agree, those extra 200 rpm's would be nice.
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Old 09-24-2006, 01:58 AM   #12
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YES! Its confirmed that the 99'-00' difs are 7" torsen with a 4.30 rear end. Looks like I need to find one now. I have only seen one miata in the junkyard. It had caught on fire and had no useable parts....I need to find one.
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Old 09-24-2006, 04:39 PM   #13
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why would a fire destroy the dif driveshaft etc?
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Old 09-24-2006, 05:16 PM   #14
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all the boots were melted and the fluid was NASTY looking. I'm not even sure what year that car was. VERY bad shape.
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Old 09-25-2006, 11:24 AM   #15
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Wait only 99-00 had the 4.30? Aw... that means my parts from an 01 is the 4.10? ah well.
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Old 09-25-2006, 11:31 AM   #16
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Wait only 99-00 had the 4.30? Aw... that means my parts from an 01 is the 4.10? ah well.
You'll start appreciating the 4.10 as you up the power so don't be too disappointed.
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Old 09-27-2006, 11:37 AM   #17
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You'll start appreciating the 4.10 as you up the power so don't be too disappointed.
Im glad to hear you say that... I have the 4.10 torsen
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Old 09-27-2006, 12:48 PM   #18
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I really want a 4.10 or 3.93 when I convert, first gear is useless with a 4.30
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Old 09-27-2006, 01:20 PM   #19
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I enjoy my 3.90, keeps RPM low on the highway.
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Old 09-27-2006, 03:53 PM   #20
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Wait only 99-00 had the 4.30? Aw... that means my parts from an 01 is the 4.10? ah well.
I'll trade you my 99 4.3 diff for your 4.10
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Old 09-27-2006, 03:53 PM
 
 
 
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