Took some cutting grinding between the LS4 and 4T80.
Transmission control was the biggest issue. He used a 24X engine with the 411 ecm and the 4L80 transmission control, but it was till missing some signals.
He eventually fragged it behind the turbo LS4. It was a high miles transmission before, so who knows how long it would have lasted behind a stock LS4. https://ls1tech.com/forums/...e-update-broken.html
He eventually fragged it behind the turbo LS4. It was a high miles transmission before, so who knows how long it would have lasted behind a stock LS4. https://ls1tech.com/forums/...e-update-broken.html
It's still a 4t80, but im not sure if he eventually got it figured out or just keeps replacing them. I have a 4t80 on my 3800 turbo, but haven't put it through its paces.
I have a couple 4t80e , one thing is they eat up quiet a bit more power than what the 4t65e does but will take a beating.. I know one has got theirs to work with the stock 3800 pcm , I'd just spend $395 on a controller and be done with it.... I will get around to putting one of mine in a 3800 turbo car at some point http://www.e-transcontrol.com/gm-transmission/
The 4T80 is a strong transmission for sure but the LS4 uses the 4T65eHD and they hold up fine. They can also be built stronger to take up to 1000 HP. Forum member Darkhorizon (Scott) ran a 9.87 1/4 mile time @ 147 MPH with a stock 4T65eHD. Point is that you may not need a 4T80 and the added weight and swap work that it brings.
------------------ " THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Spintech/Hedman Exhaust, P-log Manifold, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, Champion Radiator, S10 Brake Booster, HP Tuners VCM Suite. "THE COLUSSUS" 87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H " ON THE LOOSE WITHOUT THE JUICE "
Originally posted by Dennis LaGrua: the LS4 uses the 4T65eHD and they hold up fine. They can also be built stronger to take up to 1000 HP.
When used alongside the LS4, the 4T65e-hd might as well be made of glass. They break all the time... even when still under warranty. It is pretty common to find a GM rebuilt transmission with the LS4 when you buy a take out. http://www.gmls4.com/index.php/topic,33.0.html
I am 1 for 3 finding a factory rebuilt transmission (although it really is 1 for 2 as my first LS4 only had 18K miles):
I'm going with the ls4 with plans on building it. i don' t want to drop thousands on a trans just to have it break again, That's why i'm asking all the questions.
The 4T80 is a strong transmission for sure but the LS4 uses the 4T65eHD and they hold up fine. They can also be built stronger to take up to 1000 HP. Forum member Darkhorizon (Scott) ran a 9.87 1/4 mile time @ 147 MPH with a stock 4T65eHD. Point is that you may not need a 4T80 and the added weight and swap work that it brings.
I don't think that Scott has a stock 4t65 in that car.
[This message has been edited by Formula (edited 07-16-2019).]
The 4T60E is a lot stronger than most people realize.
Doubters can ask Triple Edge Performance. He knows these transmissions backwards and forwards. He can build a 4T65eHD to take any power lever you can throw at it. Triple Edge Performance ------------------ " THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Spintech/Hedman Exhaust, P-log Manifold, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, Champion Radiator, S10 Brake Booster, HP Tuners VCM Suite. "THE COLUSSUS" 87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H " ON THE LOOSE WITHOUT THE JUICE "
[This message has been edited by Dennis LaGrua (edited 07-16-2019).]
Anyone have any measurements on the oil pan for the starter? Tried to contact Furches performance on his oil pan to put the starter there. But haven't got a reply.
Anyone have any measurements on the oil pan for the starter? Tried to contact Furches performance on his oil pan to put the starter there. But haven't got a reply.
GM had a prototype oil pan that put the starter in the oil pan, but it never made it into production:
Nearly everyone doing a LS4 swap w/o the 4T65e-hd is using some variation of a bolt on starter mount that keeps the starter in the stock LS4 location. However, it doesn't look like the starter would clear the 4T80 protruding valve body.
What this means is that bfurches is probably the only person who has taken the time to R&D the measurements for the oil pan starter.
[This message has been edited by fieroguru (edited 07-20-2019).]
Doubters can ask Triple Edge Performance. He knows these transmissions backwards and forwards. He can build a 4T65eHD to take any power lever you can throw at it. Triple Edge Performance
After it's been performance built. The discussion understood was regarding stock. The stock 4T80 outlives the 4t65.
After it's been performance built. The discussion understood was regarding stock. The stock 4T80 outlives the 4t65.
The stock 4T80 may be stronger is stock form but at the cost of more weight but the question is it really necessary.? You are pushing a light car. Look at this run on You Tube. 9 second Fiero 2nd run This is where forum member Darkhorizon (Scott) ran a 9.87 1/4 mile time @ 147 MPH with a completely stock 4T65eHD. To run that ET he must be making 600HP. How much more strength is necessary?
------------------ " THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Spintech/Hedman Exhaust, P-log Manifold, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, Champion Radiator, S10 Brake Booster, HP Tuners VCM Suite. "THE COLUSSUS" 87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H " ON THE LOOSE WITHOUT THE JUICE "
Originally posted by Dennis LaGrua: The stock 4T80 may be stronger is stock form but at the cost of more weight but the question is it really necessary.? You are pushing a light car. Look at this run on You Tube. 9 second Fiero 2nd run This is where forum member Darkhorizon (Scott) ran a 9.87 1/4 mile time @ 147 MPH with a completely stock 4T65eHD. To run that ET he must be making 600HP. How much more strength is necessary?
quote
Originally posted by darkhorizon:
And now with a billet precision torque converter with a billet flexplate. I was lucky to get this back in the day while the GMR chains were still available they were not that expensive used.... Its realistically a $4000 transmission if you ask me, I have no desire to sell it for less.
I went nearly 10s on a factory stock 150k+ mile trans, so it really doesnt take too much to have fun.
Nearly 10's = low 11's on the stock transmission. All of his runs in the 9's were on his race built transmission with over $4000 in hard parts. Some of these parts are no longer available like the GM Racing 1" chain.
Just about everyone who is really pushing the 4T65e-hd has $4000 + into their transmission and several have even broken these $1000+ parts.
Most of the guys looking at the 4T80 are looking for a stronger transmission they can leave mostly stock and not worry about fragging a $4000 transmission. It is the same theory with the turbo LS guys. Lots of them are using 200K mile junkyard 4.8/5.3 and leaving them stock, running them to 800 hp, enjoy it for a long time, and when it frags, replace it with another $800 motor and get back at it. A desire to keep the cost of enjoyment as low as possible is key here.
[This message has been edited by fieroguru (edited 07-27-2019).]
The stock 4T80 may be stronger is stock form but at the cost of more weight but the question is it really necessary.? You are pushing a light car. Look at this run on You Tube. 9 second Fiero 2nd run This is where forum member Darkhorizon (Scott) ran a 9.87 1/4 mile time @ 147 MPH with a completely stock 4T65eHD. To run that ET he must be making 600HP. How much more strength is necessary?
Seen it many times. You obviously didn't read the comments like I did a long time ago, though.
"4T65e trans with a few good parts to handle the power. Sprayed a 50shot in both hits, first one went poorly due to making a test pass on low boost... Nitrous didnt like low boost as much as I remember it did. Nitrous turns off after I make 10psi of boost. Was running over 27psi on the 9.8 run."
GM had a prototype oil pan that put the starter in the oil pan, but it never made it into production:
Nearly everyone doing a LS4 swap w/o the 4T65e-hd is using some variation of a bolt on starter mount that keeps the starter in the stock LS4 location. However, it doesn't look like the starter would clear the 4T80 protruding valve body.
What this means is that bfurches is probably the only person who has taken the time to R&D the measurements for the oil pan starter.
