I am Jeff

It's the extra torque that is wearing out the stock tranny. You shouldn't have to worry about your tranny with LTH's if you're not launching your car at the strip all the time.

NellyRod

OP has a stage 2. I thought the tranny is capable of handling it. Is it just the stage 3 that requires a bullet proof tranny???

Weistec

For ease of understanding, we recommend the transmission build for our Stage 3 systems however building the transmission is purely dependent on power level and type of use.

For those who are running consistent 10 second passes at the quarter mile, this puts major strain and heat in the transmission. It will eventually start to see signs of slippage. We hope this helps.

Weistec Engineering

ScGRaceR

monster power! congrats on your build!

Merc63

It's the huge increase in torque and power from the blower. Tranny was never designed for it. Headers it will be absolutely fine though.


The older 7G trannys arent as strong as the MCT. With the numbers he's putting down and the miles on the car I wouldn't expect it to last long. The full WOT shifts in high gears put tons of strain on the clutch packs.

I think mr747 is running stage 2 and he blew through his tranny quickly.

I am Jeff

I'm not so sure about that. A few tech friends of mine have been mentioning about how MCT's are coming back to the shop for clutch slippage. And these are vehicles that do not have the superchargers.

mr747

Merc63 is right couple days of street abuse and 4 passes at the track and fried it's that bad I can't even drive it now

I have a 7g the mct is a stronger box it can handle another 100nm

Weistec

The MCT version of the 722.9 is definitely an evolved version of the transmission. It runs larger planetary gears (more surface area on the teeth) has more clutch capacity, superior electronics and control, etc. It isn't stronger by much on the M156 equipped cars but in theory it is stronger.

The MCT that is equipped with the M157 cars does have various differences that make even a bit stronger. Hopes this give a better understanding.

Weistec Engineering