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.

 

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.

 

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

 

my wife's '99 had that.

 

You asked if it would be as strong as the torsen...so I answered that part..

 

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.

 

http://members.aol.com/solomiata/Drivetrain.html

 

KFJ, you wifes 99' had a 4.30 7" rear end?

 

pretty certain.

 

I wouldn't mind a 4.10 to bring the revs down about 200rpms in 5th gear

 

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.

 

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.

 

why would a fire destroy the dif driveshaft etc?

 

all the boots were melted and the fluid was NASTY looking. I'm not even sure what year that car was. VERY bad shape.

 

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.

 

Im glad to hear you say that... I have the 4.10 torsen

 

I really want a 4.10 or 3.93 when I convert, first gear is useless with a 4.30

 

I enjoy my 3.90, keeps RPM low on the highway.

 

I'll trade you my 99 4.3 diff for your 4.10