rx8 r/p on 86-88 rx7 lsd

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12-24-2009, 04:48 PM
pitbull113

rx8 r/p on 86-88 rx7 lsd

So I get the 86-88 rx7 non turbo lsd to install in the miata case. After reading on several websites that the rx8 4.44 r/p is tha same and will fit I go buy one. Well it doesn't. The 4.44 is too big and I'm wondering did I get the wrong info or the seller of the r/p give me the wrong parts. This is just one of the links to the info I was going by http://www.turbomagazine.com/tech/08...ech/index.html Can anyone confirm or deny that the rx 8 r/p fits the lsd from the 86-88 na rx7 and 94-97 miata like I've been told.
12-24-2009, 06:16 PM
seckerich

No, it does not. The ring gear is the same size as the 86-91 Turbo 2 RX7 but the pinion is shorter. Limited slip from 86-91 NA RX7 will fit the 1800 Miata rear end.
12-24-2009, 06:24 PM
pitbull113

Thanks Steve. I guess it's always advisable to seek the advice of an expert before you believe something on the internet. I guess if I buy a boat I have an anchor:shrug:
12-24-2009, 06:27 PM
pitbull113

Quote:

Originally Posted by seckerich

Limited slip from 86-91 NA RX7 will fit the 1800 Miata rear end.

86-88 is the clutch type and 89-91 is a torsen right?
12-24-2009, 10:24 PM
seckerich

All of them are clutch type. I heard they put the Torsen in some of the 91 cars but never actually saw one. The Torsen we use in the ITS cars is actually a Miata unit. I think I have one on a shelf somewhere. Keep in mind that the ring and pinion from a first gen RX7 fits the 1800 Miata case. Off the shelf gears are 4.88, 5.12, and very hard to find 4.6 and 4.44 that were old RX3 gears.
12-24-2009, 10:34 PM
pitbull113

Thanks again Steve. mazdaspeed motorsports shows a 4.44 for the miata @ $480. I don't know if they still carry the gears but I was able to put it in my shoppingcart.
12-24-2009, 11:22 PM
Andy Bettencourt

Quote:

Originally Posted by pitbull113

Thanks again Steve. mazdaspeed motorsports shows a 4.44 for the miata @ $480. I don't know if they still carry the gears but I was able to put it in my shoppingcart.

I think I bought the last one in July.
12-25-2009, 11:09 AM
pitbull113

Quote:

Originally Posted by Andy Bettencourt

I think I bought the last one in July.

:eek:
12-25-2009, 03:59 PM
C. Ludwig

Quote:

Originally Posted by pitbull113

86-88 is the clutch type and 89-91 is a torsen right?

86-88 is clutch type. 89-91 is viscous. There were also open diffs is quite a few of them so you're no guaranteed an LSD if you buy one.
12-25-2009, 09:57 PM
pitbull113

Quote:

Originally Posted by C. Ludwig

86-88 is clutch type. 89-91 is viscous. There were also open diffs is quite a few of them so you're no guaranteed an LSD if you buy one.

yeah i found that out the hard way.