750 hp dyno on 4l60e?
750 hp dyno on 4l60e? When my builds done can I have it tuned with the Sissy 60e in it without it breaking? Just want to get it tuned and running before i get a tranny installed cause im sure they will drive it to make sure the trannys shifting proper and I want some hard heat cycling dynos as the break in to seat my rings well.
Well, depending on how it was built, it may last for at least a tune. Hell, some guys have got some 60s to last for numerous 9 second passes and are convinced the 60e can be built to hold that power reliably 
It's kind of a toss up, for just tuning you may be ok, but it would be less of a hassle to swap the trans now and get the car tuned for the new trans and all without having to potentially pay for a retune later, depending on who/how nice your tuner is.
It's kind of a toss up, for just tuning you may be ok, but it would be less of a hassle to swap the trans now and get the car tuned for the new trans and all without having to potentially pay for a retune later, depending on who/how nice your tuner is.
It all depends on who built it. We have many, many 4L60e transmissions eating more than 700rwhp. Depending on how you run it, you will most likely need to refresh it after a few years if you regularly drag race the car. If its primarily a street car it should last quite a while.
No no no. The 60e I have is mostly stock I just wanted to use it for the dyno to seat my rings good before I take the car to get a 80 put in it and didn't know if the dyno would trash the 60 like the streets will.
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Probably no one is responding, but they don't think this is a good idea.
I'm no trans expert, but since no one else has responded, I will take a shot...
If you run 750HP through a stock trans with shifting on the dyno, it will fail big time.
If you tune it to lock out 4th gear AND don't apply full power until you are in 3rd gear, then it is more likely to hold. At least installing a stiffer boost valve spring (or entire boost valve) to increase line pressure would also make it more likely to hold.
If a more experienced person says I am wrong, then believe them!
I'm no trans expert, but since no one else has responded, I will take a shot...
If you run 750HP through a stock trans with shifting on the dyno, it will fail big time.
If you tune it to lock out 4th gear AND don't apply full power until you are in 3rd gear, then it is more likely to hold. At least installing a stiffer boost valve spring (or entire boost valve) to increase line pressure would also make it more likely to hold.
If a more experienced person says I am wrong, then believe them!
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