rrbigdan

I'm building a 383 Stroker for a 94' Z28. What should I do for gears? I know that 4L60E suck A$$. On a stock motor I went throught 4 transmissions in 2 year period. Is there anyone out there that know stuff about 4L60E transmissions. Is it possible to beef up the tranny to handle a 383 stroker plus 7psi Turbo.

How about a 4L80E or 4L65E would these do the trick?

30696bird

They suck??? I went over the 154,000 mile mark yesterday on mine. It has never been changed. Of course I'm only pushing 370 RWHP and have a 3200 stall. I change the filter every 40-50,000 miles, and I also have a tranny cooler. It's all in the way it was built AND how well you take care of it. You can beef them up or go with a stronger transmission.......it's all up to you.

SC95LT1

Quick question about the 4l60e. Mine is toast and I'm looking for another one, are the ones out of the trucks the same? Gearing and all that? If so it makes my search much easier as I see many more out of trucks than F-bods.

revtime

Some people have better luck I guess.
In my opinion yeah they suck. if your going to put down serious power go with something other than a 60E or spend a couple grand on getting it built by someone who knows what they are doing and even then I think its a crapshoot.

94SLUG

I'm on tranny 6 maybe 7, thousands of wasted dollars. Get it built right and it should last. Dont know how many miles I have on the rebuilt tranny and new motor combo but it has to be close to 20k.

700r4/4L60/4L60E=Junk IMO

SC95LT1

Just thought I'd throw this out again.

BLinindoll

Depends on what it is coming out of. Sometimes the gearing could be different, the valve body separator plate can be different, apply pressures can be different, pressure relieve spring, accumulator springs... so many factors. Also, you need to find one with a large bell housing to line up with the block. It can be done. I would personally find a core tranny (one that is shot) from a truck or a camaro and rebuild it. No point in putting in a "junk yard" tranny and not knowing how many miles or what condition it's in. For all you know it could be shot too. Find a core and have it rebuilt. Have em put a vette servo in and a shift kit as well.

BTW, 4L60e's are a great tranny. You guys that are on your 6th or 7th tranny... find another shop or learn to drive. Something is wrong, and it's not the tranny.

94SLUG

When you have 500+rwhp longevity is not in the vocabulary, stuff will break, especially a 4l60e. You must find the right builder and even then it’s a ticking time bomb, then put some slicks on. I never built 7 turbo 350s or 400s never one in other vehicles. I cant justify spending 1700+ on a built 4l60e after shiping. T56 is the better way to go. Ya it will cost you to build and put in, but it will last atleast.

Our cars have flaws the Opti, rear, and the 4l60e.

2000GTP

There is a place by my house in Naperville, IL and their website is www.flp2win.com, they sell a stage 4 4L60E for 2000.00 and a stage 5 4L65E for 2800.00 They put a stage 5 in a twin turbo vette pushing 725rwhp and have reported no problems after many track passes.

revtime

Why don,t you get back to us when you get that LE2 setup in and hit the track and put down a 1.7 or better sixty foot.
It is a ticking time bomb, if you drag race it and have some decent power.
2800 for a tranny to handle 725 horse..........hmm Rossler will build a TH400 with transbrake and reverse manual valvebody for around 1400. It will be virtually bulletproof.
Do I wanna pay another 1400 for OD? Let me think........ NO.
I have had many GM musclecars in my time and NEVER had a tranny problem......all of them TH350s or 400s, all putting out the same or more HP than my 94Z.
I love the car and want to keep it but its getting an old school tranny so I can stop worrying about it.

BLinindoll

I never said they were good for any high horsepower applications. My statments about the 4L60e's were all based on the fact that everyone saying they suck all have minor mods according to thier sigs. For them, they SHOULDN'T have any problems with a 4L60e. If they do, BASED ON WHAT THEY HAVE DONE IN THEIR SIGS., there is probably another factor, like bad rebuilds, lack of maintenance, or bad driving habbits. I never once said the 4L60e was good for high HP apps., due to the fact that I realize that they're not built for it.

BTW, when i get that LE2 setup, the tranny will be built, and built right. I'm not an idiot.

Also, lets try and get back onto the topic of what this thread was created for instead of getting into a heated battle over if the 4L60's are a good tranny or not.

revtime

I don,t want this to degrade into a fight either BUT keep in mind he asked about a 383 with 7 lbs of boost, and whether or not a 4L60E could be built to handle that kind of power. In my opninion it can,t without spending...what was said above? 2800 bucks. Now your getting into GearVendors territory and it will be way stronger than any 60E.
If you want to spend several thousand dollars on building one be my guest but I won,t.
Just my opinion though which is what he asked for.

Dnsean

what about a performance rebuild, heavy duty everything, new clutchs, corvette servo, shiftkit, 2400-2600 stall, 3.73gears, and replace bearings 2400-2700 at atomic transmission in villa park, il does that sound good, i'll actually know for sure wht upgrades, billet something as well heh i forget

BLinindoll

revtime... He first stated that he went though 4 transmissions on a stock motor.... something is/was wrong. I understand he's building a 383, but he is basing his opinion about that tranny using a stock motor. I was trying to explain that on a stock motor, a 4L60e is a good tranny, if built right and taken care of. But again.... back to the topic.

Dsean... Are you planning on doing any motor mods? If so, what?

Dnsean

i'm prob gonna get new heads or portn plish mine, or go to a lt4 conversion... but ive been also thinking about building a 383 on the side with the works...
the tranny will have alot of performance stuff also, i dont have a list on me, but i know billit servo, corvette servo, heavyduty bands.. n so forth