Don't ask...
Now what about fellows running low 11's high 10s' in a stick, they gotta change their $1,000 clutch every year or 2. It kinda works out.
No question the 4l80 is stronger, but thats a lot of cake for the tranny/conversion. And you're car will probably be slower all things the same.
Any A3 is a track only tranny in my opinion, this day and age.
As time progresses, parts get better, and knowledge increased, etc.
The 4l65 has what extra,a 5 pinion planetary and a hardened output shaft, both of which are things that ususally never fail. It's usually a clutch or a band to fail.
Now what about fellows running low 11's high 10s' in a stick, they gotta change their $1,000 clutch every year or 2. It kinda works out.
No question the 4l80 is stronger, but thats a lot of cake for the tranny/conversion. And you're car will probably be slower all things the same.
Any A3 is a track only tranny in my opinion, this day and age.
As time progresses, parts get better, and knowledge increased, etc.
The 4l65 has what extra,a 5 pinion planetary and a hardened output shaft, both of which are things that ususally never fail. It's usually a clutch or a band to fail.
Our cars are already at the breaking points of the units and when we start pushing it, making more power then factory, adding high stalls, introducing a whole new level of heat to fluid is what burns it up.
GMHTP had a great artical on what breaks on these trans, but I forget the volume and yr, ill have to research it.
Long story short, the post started with your car on a lift with the trans pan out and asking not to ask..., and we had discussed the cost of your last one, UNexpected as it was with a wedding on the way and I cut yea deal on the rear. Just saying if that was the case, to move up in quality of trans.
At this point there is nothing else I need to comment on, my opinion has been stated, and turns out it wasnt a fragged trans, just one that wasnt working like it was expected to.
Anyways It's all good now, I know that the 4l60 will always be the weak link, but I have confidence this one should last me for quite a while.
I appreciate the rear too, it allowed me to enjoy my car this year for the limited miles I actually drove it. Basically as a bandaid, until I can afford a built unit next year. So that worked out great for me (even though the posi is starting to go on it from that track day). It's still dead quiet though and it keeps me rolling, so i'm happy.
I'm just glad I can tuck the car away again this year without any mechanical issues.

That lift was a PIA, who knew you had to bleed it 15 times!
I had to wait how many weeks to do my work??? It's all a conspiracy! I guess I'll just have to buy a domestic car now. 
PS That's why I'm comming over here more and more. I need to do some learnin'. <----- said in a hillbilly voice.
I opted for a used/built 4L80 for my truck. No problems and chirps each gear so far.I'm lucky

BTW- GTO was a 2004.
We did the Vacum mod kit,HD2 kit,,clutchs,3/4 servo,deep pan and 5pin unit..
GM shell was used...
I had 215PSI and over 200 runs on it and its still working well in the car
This was also goin low 11/high 10's for a loooooooooog time.
Last edited by JS; Oct 16, 2007 at 01:32 PM.
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Example, a 4l60 in a car making 450 rw that weigh's 3700 vs a car making the same power that weigh's 3300. I dunno how much longer it would last in the lighter car, but it's bound to last a good bit longer. I am not suggesting that a lw car is the only way to get a 4l60 to live, but it certainly would make more sense on why you sometimes see people have them stay togeher for a long time vs some people that have constant problems.
I have seen one company be the best for a few weeks dosent matter whatthey sell then a few parts are wrong or something dosent work right on a couple and then there the bad guys. Until next week anyway, Its really kinda humorous when you think about it. I think every company here does everything that can to make sure there are not problems but really when it comes down to it we are not so different from you guys when your working at home on something , Sometimes the most carefully done thing just dosent go right. So you do your best, fix it and move on.
I have seen one company be the best for a few weeks dosent matter whatthey sell then a few parts are wrong or something dosent work right on a couple and then there the bad guys. Until next week anyway, Its really kinda humorous when you think about it. I think every company here does everything that can to make sure there are not problems but really when it comes down to it we are not so different from you guys when your working at home on something , Sometimes the most carefully done thing just dosent go right. So you do your best, fix it and move on.
I opted for a used/built 4L80 for my truck. No problems and chirps each gear so far.I'm lucky

BTW- GTO was a 2004.
If you have common sense,have a reliable builder and keep the trans temps below 200.I really think the 4L60E will go deep into the 10's a yr of hard racing with nothing more than a clutch change...
I'm not concerned. FLT will continue to out sell you in transmissions like they do every month, and then when sales slow down, there is always the repairing & rebuilding of your units. Business is great! And yes, not everyone's are perfect, but there are those like FLT and RPM that RARELY have a trans come back due to properly building them and properly testing them in the first place. I have seen the insides of your units and was not impressed. Do you have a warehouse full of 8 year old Korean kids building them? Looked like it to me....
I'm not concerned. FLT will continue to out sell you in transmissions like they do every month, and then when sales slow down, there is always the repairing & rebuilding of your units. Business is great! And yes, not everyone's are perfect, but there are those like FLT and RPM that RARELY have a trans come back due to properly building them and properly testing them in the first place. I have seen the insides of your units and was not impressed. Do you have a warehouse full of 8 year old Korean kids building them? Looked like it to me....
Last edited by performabuilt; Oct 17, 2007 at 01:47 PM.
That is my simple rule when threads flame up. If you don't have FIRSThand experience, don't post over and over again.
Good luck the guy with the C5. Trans problems are frusttrating, sometimes they are due to improper install, bad converters, junk in the fluid, and in build error.
I had an FLT 4L60E for a few years that never skipped a beat, one of their first. The trans can be made reliable.











