Broken diff housing
#1
Elite Member
Thread Starter
Join Date: Jul 2005
Location: Anacortes, WA
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Broken diff housing
I put my car up on the lift and happened to notice this. Diff arm cracked right through the machined in break here feature. I hadn’t noticed anything weird but from the fracture surface it doesn’t look like it was broken all the way through for very long. Might have broken my last autocross run last weekend and I just happened to see it. Anybody else breaking these? I cringe every time I see people jacking up there car by the diff and It is something I’ve never done.
#12
The Rx7 one looks heavier. If I find it to be a problem on my car I'll fully box the arms and send it out to be re-heat treated.
I'm not sure how people jack by the diff. Even with my super long reach ultra low HF racing jack I cant reach it, the jack hits the stock 94+ "cannon brace" before I get in far enough. When I jack the rear I jack from the rear most bolt of that brack. Hasn't bent anything yet.
I'm not sure how people jack by the diff. Even with my super long reach ultra low HF racing jack I cant reach it, the jack hits the stock 94+ "cannon brace" before I get in far enough. When I jack the rear I jack from the rear most bolt of that brack. Hasn't bent anything yet.
#16
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Join Date: Jul 2005
Location: Anacortes, WA
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So I Guess I found another weak point. I have already determined the inner CV’s wear out fairly rapidly. About half a season and the ***** imbed themselves into the outer cup and they start developing lots of slop. I suspect Mazdaspeed axles would fix that.
#17
Given the location of the relief notches the housing must be snapping from front to rear movement of the drive train. What kind of motor mounts are you guys who broke em running?
Would something like this help?
Joy Fast PPF performance bars - MiataRoadster - High-performance customer service...and parts for Roadsters
It would stop the twisting and front to rear movement of the drive train.
Would something like this help?
Joy Fast PPF performance bars - MiataRoadster - High-performance customer service...and parts for Roadsters
It would stop the twisting and front to rear movement of the drive train.
#18
I have one of those but a Beatrush one. I bought it to try and alleviate axle tramp in the damp conditions of my first race but quickly took it off becaues in the wet the transition from grip to no grip was instant and undetectable, on the road....frightening. Can't imagine it being better on the track..
I do wonder if it is an improvement to the standard setup in the dry though....in for anyones experiences....
I haven't had a chance to do a back to back test, due to combination of building car and the wet winter has prevented much driving/testing....but intend to at some point.
I do wonder if it is an improvement to the standard setup in the dry though....in for anyones experiences....
I haven't had a chance to do a back to back test, due to combination of building car and the wet winter has prevented much driving/testing....but intend to at some point.
#19
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Join Date: May 2005
Location: Chantilly, VA
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The Rx7 one looks heavier. If I find it to be a problem on my car I'll fully box the arms and send it out to be re-heat treated.
I'm not sure how people jack by the diff. Even with my super long reach ultra low HF racing jack I cant reach it, the jack hits the stock 94+ "cannon brace" before I get in far enough. When I jack the rear I jack from the rear most bolt of that brack. Hasn't bent anything yet.
I'm not sure how people jack by the diff. Even with my super long reach ultra low HF racing jack I cant reach it, the jack hits the stock 94+ "cannon brace" before I get in far enough. When I jack the rear I jack from the rear most bolt of that brack. Hasn't bent anything yet.
sounds like someone belongs in the CR slammed thread.
#20
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Thread Starter
Join Date: Jul 2005
Location: Anacortes, WA
Posts: 2,478
Total Cats: 144
Given the location of the relief notches the housing must be snapping from front to rear movement of the drive train. What kind of motor mounts are you guys who broke em running?
Would something like this help?
Joy Fast PPF performance bars - MiataRoadster - High-performance customer service...and parts for Roadsters
It would stop the twisting and front to rear movement of the drive train.
Would something like this help?
Joy Fast PPF performance bars - MiataRoadster - High-performance customer service...and parts for Roadsters
It would stop the twisting and front to rear movement of the drive train.