Drivetrain after 1 year at 700 HP
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Registered User
Joined: Jul 2003
Posts: 1,293
From: Northeast US
Rep Power: 82
Drivetrain after 1 year at 700 HP
I am in the middle of a cluch install and when the tech took the transmission out, he discovered a broken transmission mount (the rubber bushing was cracked) and the rubber portion of the flange where the front drive shaft mounts was also cracked. These parts were checked last winter as part of the Protomotive 700 upgrade and they were fine. One season / 15,000 miles at 700 HP and they are broken. It could just be age and fatigue (5 1/2 years & 79,000 miles) or it could be they are not designed for 700 HP or maybe a combination of the two (my guess) and maybe it's from those 1/4 mile days (my guess also)...the parts are not too bad from a cost standpoint...and I think I will get more than one season out of the new parts. We'll see...Any other high HP cars see this?
I broke my tranny mounts at the 1/4 strip as well...
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2001 996TT 3.6L and stock ECU
9.66 seconds @ 147.76 mph 1/4 mile click to view
160 mph @ 9.77 seconds in 1/4 mile click to view
50% OFF ON PORSCHE ECU TUNING BLACK FRIDAY SPECIAL
2001 996TT 3.6L and stock ECU
9.66 seconds @ 147.76 mph 1/4 mile click to view
160 mph @ 9.77 seconds in 1/4 mile click to view
50% OFF ON PORSCHE ECU TUNING BLACK FRIDAY SPECIAL
Transmission mount
Registered User
Joined: May 2007
Posts: 75
From: united kingdom
Rep Power: 31
Just replaced my third one due to the same problem,
Mines running 610bhp.
only thing i noticed was an occasional colnk when selecting reverse and pulling back.
Mines running 610bhp.
only thing i noticed was an occasional colnk when selecting reverse and pulling back.
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Thread Starter
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Registered User
Joined: Jul 2003
Posts: 1,293
From: Northeast US
Rep Power: 82
No, my engine is not rebuilt and there was no sign of these failures. Had we not taken things apart, I never would have known...
Last edited by John D; Apr 16, 2008 at 08:11 AM.
Thread Starter
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Registered User
Joined: Jul 2003
Posts: 1,293
From: Northeast US
Rep Power: 82
It was just the rubber bushing was cracked. They said that they can dry out and crack and it could just be age, but going to the 1/4 mile strip a few times didn't help any...No pictures yet, but I can get some later this week.
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Joined: Oct 2007
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From: NYC
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Do you have the part numbers and the cost? I'm dropping my tranny for the clutch this weekend, so I might as well do some preventative maintenance while I'm in there. I'm coming up on 60k miles pretty soon.
