1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

Clunking noise from differential area

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Old Mar 27, 2007 | 11:28 AM
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Clunking noise from differential area

ok lets establish that i am a dumbass, I did a burnout in the rain and it was very violent when the tires hooked up, something broke, i am trying to figure out what.

it is either the connection of the drive shaft to the diff. or the diff. itself, the sound it makes while rolling 5-10mph is like ... clack....clack...clunk... I cant see any damage to the U-joints which leads me to believe that it is the diff.

can any of you guys help?

also how fast could i get new diff. gears?
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Old Mar 27, 2007 | 11:38 AM
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lol, you kids make me laugh. You shouldnt have a tough time finding your parts.
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Old Mar 27, 2007 | 12:07 PM
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Local junk yard or salvage shop. Many of the salvage yards today are in a network. My buddy got a GSL rear-end for $100.
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Old Mar 27, 2007 | 12:42 PM
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pistons do what?
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What gears exactily will interchange with an SA, none of the salvage yards around here have rx7's or miatas from any year
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Old Mar 27, 2007 | 12:45 PM
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Originally Posted by 79rx_7
What gears exactily will interchange with an SA, none of the salvage yards around here have rx7's or miatas from any year
www.mrmazda.no-ip.com

Last edited by Rx-7Doctor; Mar 27, 2007 at 12:52 PM.
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Old Mar 27, 2007 | 12:52 PM
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From: So. Arlington, TX!!!
I'll bet you fragged the pinion bearing...for an SA, you need the pumpkin rear from a 78 to 82 car...some early '83 will also work, but there is definitely a transition to the big driveshaft mounting flange somewhere in that year which I found out the hard way...
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Old Mar 27, 2007 | 03:16 PM
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Sure your diff flange bolts aren't just loose?
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Old Mar 27, 2007 | 03:34 PM
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pistons do what?
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I cant find anything, the closest thing that i have found is a complete rear end on ebay for $350 shipped, none of the junck yards around me have RX-7s or miatas. I also cant get strait answers on weather differential assymblies from other years or miatas will directily interchange.
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Old Mar 27, 2007 | 04:53 PM
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Originally Posted by 79rx_7
I cant find anything, the closest thing that i have found is a complete rear end on ebay for $350 shipped, none of the junck yards around me have RX-7s or miatas. I also cant get strait answers on weather differential assymblies from other years or miatas will directily interchange.
Not sure where you are in TX, But if your close to Katy check the classifieds here:

http://www.txspec7.org/forum

You wont find a LSD for less
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Old Mar 27, 2007 | 05:08 PM
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From: So. Arlington, TX!!!
The straight answer on interchangeability is in this "tech" section...use the search engine and just type "Miata" or "differential swap" and then start sifting through the threads...I remember one from last year when I had to go pumpkin hunting and wanted to know what options I had for the '84...pele is an excellent person to PM on this question if you find investigatory research too daunting...

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Old Mar 27, 2007 | 08:40 PM
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Originally Posted by 79rx_7
I cant find anything, the closest thing that i have found is a complete rear end on ebay for $350 shipped, none of the junck yards around me have RX-7s or miatas. I also cant get strait answers on weather differential assymblies from other years or miatas will directily interchange.
I gave you the link to mrmazdas interchange. It has all the info there about Rx7
interchangeability.

www.mazdatrix.com also has this info.
The info as Mar3 has stated is also on our forum.

Now quit stating excuses why you can't figure it out and get that damn car back on the road.
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Old Mar 27, 2007 | 10:11 PM
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60 bucks!

http://srx7.taylorrotorsports.com/fo...73235638ffada8
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Old Mar 27, 2007 | 10:35 PM
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pistons do what?
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I am PMing that guy ^^^, it will save my *** if he still has that rear end.
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