Bspeck82

And at least 2400 into a trans.

BCNUL8R

iTrader: (2)

Game ova

My Th400 cost me about $750...maybe $800.
Edit: Forgot a few things, make it about $1100.

truckdoug

iTrader: (25)

the couple f body 8.8's I did came in right around 1000 with $250 moser axles, $60 hiltsy torque arm bracket and $300 for my time and tools.

ddnspider

iTrader: (26)

bah humbug....stock 4l60e is just fine.

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Put something that is making some steam in front of that transmission, and see what happens to it.

MY_2K_Z

iTrader: (1)

Lol sure man. You keep babying that 4l60 and I'll keep thrashing my 4l80e. Not really trying to argue but the 4l60 is a pile of **** especially at these power levels. So many options that are much much stronger. I laugh every time I see one of those adds that's like "level 12 4l60e good for 700hp" only cost your arm, leg, and first born.

ddnspider

iTrader: (26)

I've taken 2 tenths off your best 60' which puts plenty of stress on the trans.

Relax dude....It's a joke. G.O. and I mess around. I am fully aware that I am in unicorn status and truckdoug says I'm sacrificing chickens making 550whp and going 1.6x at 3800lbs in a bone stock 4l60e and its been alive for well over a year.

MY_2K_Z

iTrader: (1)

No need to relax just having some fun picking at you. FYI I'm a little sore on 4l60s as I had been through 3 of them in my old truck with a stock 5.7 in front of it.

ddnspider

iTrader: (26)

Ouch....I can appreciate your pain. I have a buddy who went through 3 10 bolts and never went to the drag strip or put a drag radial on it

Game ova

You should have got the Level 45 model, it's good for like 730rwhp.

MY_2K_Z

iTrader: (1)

Lol truth. On the subject of 10 bolts, my stock 173000 mile 10 bolt looked flawless when I tore it down to replace with an 8.8. I was pretty surprised to say the least. But I replaced it so I could drive the car hard without having to worry about when or if it would leave me stranded.

ddnspider

iTrader: (26)

What's the Th400 rated to that you built.....ballpark. You're 700whp+ right?

98CayenneT/A

1.5x 60's on my self built 4l60e. Is a 4l80e stronger..... ABSOLUTELY. Can a 4l60e be built and tuned to handle power...... ABSOLUTELY. 4l60e is not ideal for big power but look at how many millions of vehicles they put them into, so obviously you're going to see more % of problems.

I have yet to burn up a clutch pack in mine. I have had a aluminum forward piston crack which is a known issue and I had the input drum blow out the snap ring tabs from what I believe to be just fatigue.

upon disassemble after the blow out my 3-4 clutches were only wore .007" after 15,000 mi. and I spin to 7,000 rpms.
I will take that kind of wear in the 3-4's all day long.

Again, I do realize the 4l80e is much stronger, but to be fair a quick look in the automatic section you will see plenty of 4l80e and th400 threads. When ya **** pound a vehicle it will happen.

Game ova

Dyno showed 742, if i had to guess...probably good for 1,000rwhp. Only weak link is the input shaft, would probably let go on an all out transbrake launch at that power level...especially in this heavy car. Which if it lets go, it will be getting a billet input shaft/forward drum.

ddnspider

iTrader: (26)

geez thats a stout piece.

Game ova

The Th400 has been around for decades more than the 4l60, and was put into millions of vehicles/tanks as well. Now with that said, do you see th400 threads in the transmission section?... sure, I have a couple myself. But compare the amount of problematic 4l60s to 400s, the transmission section is overrun with hulled 4l60s.

ddnspider

iTrader: (26)

Go back 10-15 years.....the FI section was littered with power limitations and blown motor threads. "Oh, the LS1 can only handle 400whp".....then "500whp is the max"....now people are like "600whp is fine." As people get smarter about engines and transmissions, stuff advances. I think this is the same, to a lesser extent, with the 4L60e. Sure, people will continue to blow them up....just like tuners will continue to blow up LS1's; but the majority are getting smarter about making stuff live.

Game ova

I can dig the point you are making. But check this out, next time you are at the track...or checking out some videos on YouTube, and a guy is talking about his car, when he gets to talking about the transmission..pay close attention to what he says is in it. Nearly every fast Turbo buick, Supra, camaro,....anything making real power, you will almost always find a 400 in their transmission tunnel. There is not a man on earth, who has ever taken a 400/4l80 and decided to go to the next level by replacing either one of those with a 4l60. And yes, I know you were just clowning around earlier.... but the 400 is tried and true, one of the toughest transmissions ever created. No special valves, no rituals needed with a 400

BCNUL8R

iTrader: (2)

In 2006 I had a level 5 4l60e put in my first GTO behind a 408. A year later I added nitrous. Over 100 passes on motor and another 100 on spray daily driven 3 seasons of the year and that trans never had an issue. Ran consistent 10.2x with it which was fast back then especially in a heavy slow GTO with a crap irs suspension. I sold that car in 2008 and just last year that guy sold the car with the same trans still in it without issues although he never raced it.

With that said if this 4l60e craps out I will most likely be considering the th400 or 4l80e for the next one. I just liked the simplicity of sticking with a built 4l60e as long as I can rather than deal with swapping to a 4l80e at this time. Eventually I know it's coming, but I also know long term a straight rear axle and mini tubs are coming as well.