ok which comes sstock in the Lt1, 94?

how much horsepower can it hold?

whats an upgraded transmission, a swap? how much they run?

 

4L60E

Can't hold a ton of power before it starts slipping....at 92k, mine started hitting the rev limiter between shifts with just bolt-ons.

www.cahallperformancetransmissions.com

 

4L60E Race Rebuild $1000 - 50% Down $500
Optional 4L65E Input Reaction Hub $235 $235
10.5" ProTourque Converter


So they can make the 4l60E to uphold 1000hp

 

I think people still break a lot of those too for some reason.

 

Yes the clutch packs and bands, not to mention the computer controlling the thing is the main drawback. Depending on power levels, this might be a great time to switch to a TH-400 A3 trannt or TH350, or the lesser chose option that still retains overdrive- 200-r4 built by century transmissions which have gotten many a gnx into the 9's. Good luck!

 

If you want OD, you might have luck with the 700r4. I bought mine from Mad Dog transmissions from Mad Dog in Florida. Run a search for him on Ebay. I haven't heard anything bad. Mine's supposed to handle 700 horse. Pretty straightforward swap. I had to get the shifter, console, flexplate, crossmember, and a throttle bracket for the kickdown cable. All that was just stock A4 stuff. I just left the pedals the same from the M6. If you do one of the aforementioned trannies, I think you'll have to make or purchase a special crossmember. Don't know about driveshafts but with the 700r4, I just reused my M6 shaft.

 

so what should i do to my stock trans. if i plan on turboing it...about 600hp

 

pull it out, sell it, and get a th400, stall, and gears. The 4l60e will waive bye bye in due time with boost assisted launches and stickies.

 

The biggest problem with the 4L60E is the people building them. Everyone claims to be able to build them comparatively few actually can. 4L65E parts are not the answer either that is another "upgrade" the sheep jumped all over and it is turning out BADLY.
I went with a reputable local shop[ when the car was stock but told them of my plans a little over a year later still 60hp shy of where I told them I planned to go that tranny died some track time on street tires. I then went with a pro-built.net tranny have nearly 2 years on it sofar similar milage am making the power I told the other shop I would and am launching on slicks now. I had used tranny fluid analysed and while they suggested a little something differnt in the way of fluid the wear looks great backed up by almost no clutch dust on a recent in pan filter change.
The only part of computer control that could be considered bad is the line pressure as vacuum modulation can respond quicker a couple companies make kits to do this to the stock tranny allowing you to retain computer shift point adjustment a very good thing.
Maddog gets no confidence from me for starters the 700R4 uses the same exact hardparts as the 4L60E so it is foolishness to believe it stronger. That is just marketting to the "computers are bad" brand of ignorance. The way he blocks out accumulation and such is not a good thing either one of the stockish b-body guys just learned his lesson on this within the last week or so blewup a Maddog 4L60E in under a year and is having a hard time getting the warranty dealt with.

I have to laugh when I hear guys talk about the 200-r4 most places rate their max effort 700/4L60E and 200-r4 to the same 800hp.

It is plain foolish to look to swapping something out as opposed to just spending the money to have the original piece built right.
Is the 4L60E the best tranny ever no is it the best for a drag only car no can a th400 hold more yes BUT at the penalty of a lesser first gear loss of pcm shift control, loss of lockup and a more parasitic piece. With a TH400 though you can consider doing things like spraying through the shifts and such I would not recommend on a 4L60E but the 4L60E well built is still a great choice for most of us that plan to DRIVE our cars.

If you look through the vendors at the right Finish Line Performance has a GREAT tranny builder too, he can make a 4L60E hold far more than most of you would believe.

 

Personally in the last 2 years I've gone through 3 "well built" 4l60e's 2 built by 2 different local shops that have goo dreps and a 3rd I bought from a member here. I killed the first 2 within 6 months of each other and went through hell to try and get warranty work done but was always told that because I raced the car the warranty was void. LESSON= find out exactly what they will cover (most shops will cover ou anyway, I just had bad luck). On the other hand I got sick of all that and got the 3rd tranny from an LS1tech member in PA...great tranny, bui;t very well and the only reason it died was my idiotic driving (read accidentaly jumping my car, smashing the pan and draining fluid before i knew what was happening.)

I just got tired of all of this and just got my T56 (m6) put in for fun factor. When I do retire the car from the street it'll be the TH400 for me on the strip.

 

"I have to laugh when I hear guys talk about the 200-r4 most places rate their max effort 700/4L60E and 200-r4 to the same 800hp."


Right....so there are routinely 4l60e's in the nines? No. Do they 700r4 and 200r4 use the same parts? No. Does Century Transmissions ( very reputable 200r4 builder for gnx's, ttypes etc) build a 200r4 that can hold more power than any 4l60e could every hope for, again the answer is yes. While it is true the 4l60e can be made to hold some power, it has many shortcomings, most notably weight (powerglide and 200 r-4 are lighter), no reliable trans brake (kaboom), reverse manual valve body, and flat out, they break ALOT, not to mention the cost of rebuilding a 4l60e to rebuilding a th400, powerglide, th350, 200 r4, or your favorite ;-) the 700r4. The 4l60e just doesn't have the sauce for big power, aggressive launches, and slicks.