Why do most guys here swap in 4L80E's?
03-09-2011, 07:13 PM
#62
I write checks with my mouth that my ass can't cash
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Iv seen a few people in the 9s with a 4l60E....i have a built transmission and ss4000 and it shifts consistent EVERY time...I have put alot of street miles on this and the fluid is pink as day 1..no heat issues here 
03-09-2011, 10:28 PM
#66
TECH Senior Member
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^^^ have silverz28camaro do it....he knows his ****....my car went 11.76 with a 1.54 at 113 with his build last year...this year hopeing for 1.4 sixty's and bottom out 11s, stock internal still ! ....shoot him a PM...very good price and will take pictures and help you out from day 1
03-10-2011, 07:34 AM
#67
Alot of good info in this thread. Between all the arguing I actually learned alot more about automatics lol. I think for what im doing a 4L80 is still gonna be the best option. Baisically for the extra barrier of safety the 80 offers. A stock 80 should be fine up until the point where I reach the limits of the stock bottom end and when im ready to build a forged 6.0 I will upgrade the trans too. I wanna be making around 900whp when its all said and done, and after reading the article on jakes performance about why he only builds 4L80s for high hp applications I was convinced. Bigger is just better in the world of autos I guess.
03-10-2011, 09:30 AM
#68
I've never been a fan of this statement because in the car would it falls short usually. But when you have them both broken down and are comparing hard parts side by side, its easy to see why the 80 is such a better transmission when youve got the small 60 stuff in one hand and a beast of an 80 right next to it..
I think this comes down to preference just like 12bolt vs 9", ect. For most people 60's will be fine. For those of us that want to push the boundaries of our street driven Fbody's, I think an 80 is a good peace of mind.
I think this comes down to preference just like 12bolt vs 9", ect. For most people 60's will be fine. For those of us that want to push the boundaries of our street driven Fbody's, I think an 80 is a good peace of mind.
03-10-2011, 10:03 AM
#70
03-10-2011, 07:59 PM
#71
Ok who has built a 4l60 to handel 1200rwhp? I ask is because i have 2 4l60 on the floor that needs repair. Im looking at a 80 from jakes when ever I can get somebody on the phone lol! Busy guy its allgood . But hey If a sponser sees this post and can build a 4l60 that will live behind 1200rwhp pm me. Im a six speed guy at heart but im not dumping 8 grand behind a tr6060 that might live. Oh this is a street car full weight.
03-10-2011, 08:13 PM
#72
03-10-2011, 10:20 PM
#73
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They are very strong, I didnt want to deal with tranny rebuilds every year or two.
If you are planning on making decent power or have a heavy car 4l80e's are the way to go.
They are heavy and a little larger than the 4l60's for the down side.
I ran my junkyard 4l80e for over two seasons with just a converter and shift kit. I finally wore out the direct clutches this year. I am in the process of a rebuild right now.
If you are planning on making decent power or have a heavy car 4l80e's are the way to go.
They are heavy and a little larger than the 4l60's for the down side.
I ran my junkyard 4l80e for over two seasons with just a converter and shift kit. I finally wore out the direct clutches this year. I am in the process of a rebuild right now.
03-10-2011, 11:03 PM
#74
I've never been a fan of this statement because in the car would it falls short usually. But when you have them both broken down and are comparing hard parts side by side, its easy to see why the 80 is such a better transmission when youve got the small 60 stuff in one hand and a beast of an 80 right next to it..
03-13-2011, 03:44 PM
#75
Assume for a moment that the hard part failures can be eliminated.
I don't build transmissions, but I think one item hasn't really been discussed. Look at how wide the ratios are on a 700r4/60e/65e. I feel that GM did that right for stock vehicles, the deep first gear is well suited to a heavy vehicle with low power and a fairly tight converter, take a stock full size chevy P/U with a 250 hp engine pulling a boat, it needs a 3.06 ratio first gear to get that load moving. Once the power goes way up, say over 600 rwhp, most likely the 3.06 first gear isn't going to do any good, and may even be a liability due to traction limits.
Also, on a budget, big and dumb is almost always cheaper.
Just my $ .02
I don't build transmissions, but I think one item hasn't really been discussed. Look at how wide the ratios are on a 700r4/60e/65e. I feel that GM did that right for stock vehicles, the deep first gear is well suited to a heavy vehicle with low power and a fairly tight converter, take a stock full size chevy P/U with a 250 hp engine pulling a boat, it needs a 3.06 ratio first gear to get that load moving. Once the power goes way up, say over 600 rwhp, most likely the 3.06 first gear isn't going to do any good, and may even be a liability due to traction limits.
Also, on a budget, big and dumb is almost always cheaper.
Just my $ .02
03-13-2011, 04:09 PM
#76
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A lot of the decision comes from from how how much peace of mind is worth to you. A good builder like the sponsors here can build you a great 4l60e that will hold up really well but still suffer the llimitations of the 4l60e. A well built 4l80e will not fail at moderate power levels which is worth it to a lot of us. A frirend of mine ran 4l60e's for a couple of seasons in the 1/4 mile and had varying luck with them. After a while he got a handle on them and had them refreshed once or twice a season and few failures. He finally changed one winter to a mildly built 4l80e and he never has touched the tranny again. For a while he changed fluid out regulary, but last I checked he never even does that. I think he has run the same tranny 3 or 4 seasons now with hundreds of runs on it and it never has missed a beat. His times were the same between the two and for him it all came down to one less thing he had to worry about...
