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70 degree night at Greatlakes Dragway in WI. GTM 147 makes 3-1/2 passes. We started with low 12's as novice straight liners trying to figure out the best launch process. GTM is 667 HP with G96-96 transaxle, cryo'd gears, FFR axles, vette hubs and 13.5 wide PS2's in the rear. At about 6200 rpm in first gear came the familiar bang and the not so familiar coasting. Name that failure?
 

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70 degree night at Greatlakes Dragway in WI. GTM 147 makes 3-1/2 passes. We started with low 12's as novice straight liners trying to figure out the best launch process. GTM is 667 HP with G96-96 transaxle, cryo'd gears, FFR axles, vette hubs and 13.5 wide PS2's in the rear. At about 6200 rpm in first gear came the familiar bang and the not so familiar coasting. Name that failure?
Ring and pinion, axles, CV joints, could be many items but drive train is most likley the culprit

What was it
 

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Usually the BANG! is followed by a bunch of continuous smaller "noises". If they are "big" smaller noises, then it is probably an axle or CV joint, but those get ugly REAL quick, and if it was "smaller" smaller noises, then it could be any number of internal to the transaxle issues. R&P, shafting, or a gear set. You really won't know until it is opened up. It could also be the splines on the star of the CV. Especially if you are running the "narrow" 930 joints that FFR recommends as "stock".

Remember, I don't recommend anything over 500 HP on the earlier Porsche G50 boxes, Corvette axles, and "stock" clutch, and even that is pushing it, especially if you are dumping the clutch and hooking up the tires real well.
 
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