6R80 issue please help

[ssmustang302]

Took the car to the local track today. On the 3-4 shift the car slowed way down. I was able to limp the car home it currently has 1st 2nd 3rd gear. 4th 5th & 6th are non existent. Could it be the E clutch drum?? Intermediate shaft?

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[Cory S]

Took the car to the local track today. On the 3-4 shift the car slowed way down. I was able to limp the car home it currently has 1st 2nd 3rd gear. 4th 5th & 6th are non existent. Could it be the E clutch drum?? Intermediate shaft?

Intermediate shaft gear sheared off. It will look like this.

 

[IPOGT]

Intermediate shaft gear sheared off. It will look like this.

Curious what it takes to do that? How is the gear attached to the shaft? I’d guess it’s not one piece.

 

[Cory S]

Curious what it takes to do that? How is the gear attached to the shaft? I’d guess it’s not one piece.

It's basically spot welded in reality. A tuner who sets shift pressures too high, will cause them to break much faster as well...... Aftermarket shafts are all 1 piece billet machined.

Here's where you can see the areas where the gear was fused to the shaft.

 

[IPOGT]

Thanks Cory. I guess it’s just built for stock levels. After seeing that though, if I still had my GT I’d get the upgraded part. Looks like the half shaft issue. OPG, now this. Spot welds no bueno. Thanks again.

 

[Cory S]

Thanks Cory. I guess it’s just built for stock levels. After seeing that though, if I still had my GT I’d get the upgraded part. Looks like the half shaft issue. OPG, now this. Spot welds no bueno. Thanks again.

If its ever apart, do the clutch pack upgrade, billet intermediate shaft, and billet planetary all at once.

 

[ssmustang302]

Thanks for the pics. When yours broke did you have 1st-3rd gear & lose 4th 5th 6th gear? I was told when that shaft breaks you will only have 1st gear?

 

[Cory S]

Thanks for the pics. When yours broke did you have 1st-3rd gear & lose 4th 5th 6th gear? I was told when that shaft breaks you will only have 1st gear?

It all depends what else happens when it breaks. Yes, with my shaft failure, 1,2,3 were available. No 4,5,6.

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