This vehicle is a 4,000 pound single cab pick up (most of the weight is from cab forward) with a 5.3 and a stage 3 4l65e built by Phoenix transmission. I'm wanting to put sole boost to the little 5.3 and make around 700-800hp was wondering the chances of the 65 surving as I'm not a fan of 80s due to there shitty gears.

 

ohhhhh boy this thread looks like it has the potential to go south.
Let me try to derail that southbound turn by covering a bunch of your statements.

A. Built by phoenix transmission...I have no clue who that is. Never heard of them. Do you have a build list? I see on their website thier "toughest model" is rated to 575 horse...and it seems to have a pretty standard build list. They fluff it up to make it sound fancy, but it's not.
B. YES a 4l60e can hold 800. It has been done, people will do it again. It can be reliable but most guys will say it is a ticking time bomb (this is MUCH more to do with the quality of the build. You get what you pay for)
C. the 80e does not have "shitty gears" the 80e actually has a more favorable rpm drop between all gears than the 60e does. And if you're making 800hp and you think you still need the 3.06 1st gear of a 60e...you're way wrong.

Long story short...after seeing phoenix transmission build list...and how they pawn off transgo parts as their own. "The Reverse drum is modified and a High Carbon 2-4 band with reinforced anchor points.You don't modify the rev. input drum for a wide band. You either use a new drum or you make sure the drum being used is true and flat. No modification needed The ¾ clutch pack has increased capacity of a stock pack and uses special spring sets in the spring packs to help prevent centrifugal apply at high rpm Transgo 7-cs springs and I bet that's all they do. Nothing special.. The pump and valve body are extensively upgraded and modified for increased oil volume and pressure and the TCC circuit is modified for positive converter clutch application."

If you want to share a little more detail on what's done to the trans, and if you're going to keep torque management...or do any trans tuning...that would be helpful. But after reading the phoenix transmission page...I wouldn't put my money on it living very long at 800 horse

 

What is "sole boost"? Were you considering dividing it up with something else?? So you're favoring the 65 over the 80...... man, nevermind. Should be a fun thread.

 

Add 80 percent more torque management and it'll be fine. You'll have an 800 hp truck that runs 18's in the quarter mile. And the transmission will last forever.

 

Not to thread jack, but I was under the impression noone keeps torque management? Im assuming thats not true or the only people keeping it are trying to make an inferior transmission live?

 

Ohhh the plot thickens.....

 

Yea. How to make a 4L6?E live with high horsepower = kill the power with torque management.
Seems to defeat the purpose of building power if you're not going to use it, but......to each his own.

 

Th400/4L80/PG, for those of us who own any one of these, we are unfamiliar with this torque management stuff. For us, its all of it, at all times

 

When using "torque management", you should disable apx 50% I have three peoples getting back to me with almost identical results when using it and not using it in the quarter mile. One in the mid tens, the other in the mid elevens, and the last in the low twelves. All three said that when using torque management, they lost an average of one tenth and one mile per hour in the quarter mile, compared to eliminating it entirely. I personally thought they would lose much more in terms of ET & MPH. One thing I have seen and heard from people doing this (over the last 12 years or so), is when you do it this way, the transmission can live much longer when drag racing it. So if you can increase the life of the transmission by 50% and more, losing this little in the quarter mile is nothing, when compared to the increase in transmission life.

 

Im honestly not trying to start anything, just trying to learn the correct information about these cars. My last 4th gen was tune only and this one is going to be built bumper to bumper so im in a whole different league this time. Lol.

 

Well...if you understood static vs dynamic friction coefficients...then you might understand torque management.
A shift takes time to complete. A SHORT amount of time if built properly.
Torque management only kills torque during that short time. So...for .2 seconds, you might be at 350tq instead of 700tq...then it is all right back in.

To Add to PBA's statement, I have had 2 cars...one nitrous and one NA...that both didn't lose much at all when adding TM back in.
If we need to discuss static vs dynamic friction we can, but I think if you understand those concepts, this conversation should be moot

 

If you want a 4l60 to live @ 800+ whp in that heavy vehicle call Jeremy @ RPM transmissions. He'll take great care of you and give you realistic and honest info.

 

Killing all torque management is stupid. It only removes power DURING the shift and its momentary. The difference in shift time is negligible. It's not like torque management loses 100hp during an entire pull.

 

No, having a transmission that requires it, in order to live is.

 

Weird.....all factory electronic transmissions from GM come with torque management. Guess they all suck.

 

Y'all ever seen those stick shift guys in radical HP cars...like the "real street" supra etc that has clutchless shifting. They use a strain gauge on the shifter to tell the ecu when they are shifting...then the ecu pulls timing for a short time, to kill the torque (and slow the motor's rpm climb rate) and help complete the shift? That's a drastic oversimplification but you get the idea.
Are they dumb too?
Static vs dynamic...timing...etc. Torque management doesn't reallly harm anything on the drag strip...pretty minimal. But it does save both soft parts and hard parts in the trans (and for anyone that street drives...it smoothes it out quite a bit)

 

Well, yea....pretty much all of them do. Save for a couple of exceptions. But even then, to purchase one of the decent new transmissions, you have to sell your soul, firstborn, and left arm to be able to afford one. Kinda cost prohibitive imo.

 

Or you just run a 4L60e which is already in the car.....and keep TM on

 

I'm going to convert you, one day soon.

 

Keep wishing!!!