I'm sure this has been asked before but I was wondering if the above 2 transmissions can hold up to 800rwhp? I plan too have my car weigh 3200 lbs with me in it. I have been 11's over and over again with a basically stock 700r4 with consistent 1.5-1.6 60' times. I'm currently in the process of doing a supercharged/nitrous/Meth injection setup. I need to know what my options are here before i pull the trigger on a transmission

 

So nobody has ever tried this or is doing it currently? Judging from the lack of responses I'm guessing I'd be better with another transmission then.

 

Sure its been done, but it costs more to go faster. The ones I've seen at that power level run around $ 3,000 or more. ProBuilt Automatics built Rick Abares 9 second trans. The hardened factory sunshell had over 2500 passes.

 

Don't remember who, but one guy in his signature says he builds proven 9's for $1400. Just passed over it, so don't quote me on that.

 

Impressive. I just want something reliable and if that means switching too a th400 then I'm all for doing in it. I just wanted too know how many people have reliably used them into the 9's. The rebuild kitbim looking at Is in fact from pro built but I didn't wanna spend 850+ on a rebuild kit if its gonna break it half way through the season. On a side note my stock 700r4 withstood numerous 11s and in the 10's once and the car made over 500 ft lbs at the wheels. Although that same day it ran the 10.8 it also started slipping. Stock 10 bolt is still holding strong but definitely has to go.

 

I blew up 3 700r4s with much less HP.
My first one I blew up in about a month no high or reverse(reverse band) and it was built with a 8 vane pump coline clutches ect... manual vlv body 3800 stall non lock up converter.
The second one was a rebuild from the stealership(hoping to limp it to build up the old one) it lasted one burnout... and it completely went out, all gears lol.
The third one made it a week and 2nd went in it making me shift from 1-3... The car got totalled that month so yeah I do not like 700r4s and from what I understand the 4l60e is the same just electronic solonoids.

The 4L60-E is rated to handle up to 360 ft/lbf (488 Nm) of torque
this has the upgraded 30 spline shaft(1984+700s) ect...

 

Yes, it can be done. I have several 4L60E's in the 9's...One of which is in a 4200# Impala SS, cutting 1.30 60ft. times and trapping 133 MPH. Fastest one I have now has been 9.7 @ 142 MPH in a 3600# Procharged, nitroused LS1 Trans Am.

Frank

 

With this tranny WHO builds it is arguably more important then the kit you buy. I have a ProBuilt tranny in my car and have been really happy with it for over 8 years now.

 

I had the opportunity to buy one of your Max effort 4l60e's frank from another member I just couldn't come up with the money at the time. I'd like too stick with the 700 honestly since it is a direct fit in my car

 

Dennis, That's understandable. In reality, a 700 will take as much abuse as a 4L60E. I, personally have a '93 Z also. I'm building and LE3 headed, 847 cammed, 6" rod 355 with a 200 shot for it. It should put the car in the 9's @ 3300#. I'm using my 700 behind it...BTW, I DO have quite a few 700's in the 10's. Just can't claim a true 9 second one YET...

Frank

 

Our cars are almost identical except mines a little heavier with 5.7 rods lol. I use a nitrous outlet plate kit and a smaller c.a.m"xfi280". I also have le3 heads and currently I have a 355. I plan on going with a forged short block over the next 6 months so i can run boost and nitrous

 

What are the prices on your 700r4?

 

I have been through two 700r4s and my car is only in the 11's... Vehicle weight also has a lot to do with the mount of abuse on a tranny.

 

Yes weight matters but how do you think the weight of your car compares to mine? Mine has been in the 11 since 2006-2007 at 4100-4200lbs and the tranny was a few years old by that time.
Mine is a street car with power seatS, AC, ABS, the only safety pieces removed would be the passenger side airbag but only because a deer set it off. I don't even own skinnies still run street tires on front.

When people break this tranny is is not because it is a bad tranny, it is either a bad builder or tuner.

 

Mine is also a street vehicle. That last 700r4 that blew was during a burnout and it sent a piece of case through my right leg. I installed a blanket after that... My car is 3600 with me in it and I retained the power seat bracket for my racing seat. There are a lot of things that can go wrong in a faster vehicle. The transmission was built by an old friend of mine (now deceased) who spent over 30 years racing and working at the local Chevrolet dealer. he built many transmissions over the years for many fast rides and was generally regarded as one of the very best in our area. I'm not saying he didn't make a mistake, but he told me more than once I should go to a heavier duty transmission of I wanted to avoid problems.

I know there are talented people in this world who can work wonders with transmissions. There is always someone who has had success in doing something most others have problems with and I congratulate those people. I am not one of them. After more than a few years of life I am a firm believer in starting with a platform that is designed to do the job and then modifying it to be better. The concept of upgrading a 700r4 for a 9 second car is (to me) like upgrading a desktop computer to do the job of a real server. The specifications may say it will work, and the builder may have plenty of references and successes to prove that it will work, but that does not mean it is the best platform for the job from a ground up engineering perspective.

If I have a choice between a TH400 and a 700r4 in a car going designed to do the quarter mile in 9 seconds, I would select the TH400 every time in regards to reliability and safety, but that is just my opinion. I suspect my 21 year old self would probably choose the 700r4 but at age 53 I would ere on the side of caution despite the small hit in weight and performance.