the slip feel that you have is exactly what a stall does in so many ways...

 

Nope, just have worked on a few built trannys. And yes the 700r4's drum is stronger where the lugs are. After breaking a few from a 4L60E a trans builder told me. Just compare the two. BTW, all shift kits are designed to increase the line pressure on shifts in the valve body, hence "shift" kit. That can just mask issues the trans might have and beat up on parts. Ive seen many trannys holding over 600whp without aftermarket shift kits. I dont know what your problem is but I'll put up my trans against any from so called expert shops and I put it together with a builder friend of mine. Im just trying to help this guy out. Ive encountered ecu issues, tcc issues and drum issues..mostly because I wanted to learn myself. Im no expert but I know more than some.

OP, if you dont believe me please install a trans temp gauge, which I recommend you should have on any modded trans, or if you have one please let us know what the temp is when it acts up on the highway after a couple miles...even if you have a cooler. Ive had my fill of transmission issues that Ive had to solve over the years and I learned a few things. You never know, a few months ago two of my close friends had to take their newly built trannys back after they fried the TCC and these were rom a well known shop. I lost 4th gear on high speed pulls (150mph+) after installing one of the "better" shift kits thinking it would help the trans hold better..fail. Ive seen other with issues after a shift kit as well. Some get lucky and have one hold for a long time. Just looking out.

 

What 700 drum is stronger than one in a 4L60E?

You're losing a lot in translation between what you type here and what your trans builder friend tells you. You make no sense and you're blaming everyones problems on the tcc.

With all the problems you've had they all have one thing in common--you.
You're doing something wrong.

 

My bad...the input drum from an early 700R4.

Here's my experience. Stock trans with a 3600 stall, after quite a while 4th was getting weak, did a full transgo shift kit with a billet 4th gear servo, lost 4th a few weeks later, race built trans, broke two input drums because of a damaged ecu that would trip out and give way too much line pressure. Replaced ECU and problem never re-occurred. Within that time I learned also to increase or delete tcc pwm since it didnt wanna lock up while cruising and it would heat up the tranny..had to hold it like at 75 or so to keep lock up. So I guess my mistake in all that was to even install or mess with the shift kit. Many builders I either spoke to or emailed told me not to go that route, that shift kits will shorten the life of the trans. Only a few parts that come in a shift kit are needed. So Sonnax was the place to go for these good quality parts. Good thing by then my trans was built...and yes I had done shift kits to other cars before and yes I did it right..at least to what the instructions said.

 

seems like YOU were the problem on all those issues? i dont see how a shift kit is to blame here. lol


you said 4th was starting to go. well why would you even waste your time with a shift kit? then the ecu was going bad and then you delete or mess with tcc or whatever. seems like your the moron, not the "shift kit".

 

I have a Aeroforce gauge purchased and it should be delivered on Friday. I will check the Trans temp along with what gear the gauge says I am in on the highway. Is this link accorate to determine what range I shoudl stay in to not over heat. http://www.tciauto.com/Products/Tech...expectancy.asp

 

You know max line pressure is mechanically built into these. Yes a shift kit raises it. In lower throttle positions and lower loads the EPC bleeds pressure off, at WOT and high load the EPC bleeds less off. There is no way a properly built 4L60E can put out more than max mechanical line pressure that was set up during a shift kit or build.
It sounds like your ECU was tuned to give more pressure at low loads.

If you lost 4th after a transgo kit and billet servo I'd be looking at the servo because the servo controls the band which also applies second with the second servo so if 4th burned up the band you wouldn't have had second either.

You seem set in your ways about your tcc fix, but you need to look at other causes. The first time I put a high stall converter into an LS1 4L60E it locked in one gear and disabled tcc after 5 miles.

I knew why and already had a tune modified to load in.

A small diameter converter can cause false misfire which disables lock up.
A high stall converter can screw with the calculated rpm drop down during shifts and cause a false P0757 or P0751 which also disables lock up.
I've seen guys on here go from a stock converter to their first high stall and not realize they were stuck in third and had no lock up and drove until the trans burned up.

As for TCC PWM I set the tables to max, but ask a few reputable tuners on here, some of them leave it stock.

My experience with a good aftermarket lock up converter slipping is that it will produce and very noticable chattering rumble, it's very obvious.
I would hope most guys would park it after feeling that.
This is why I believe your problems were not TCC PWM tuning related.

Another thing that doesn't make sense is the 700R4 input drum you mention.
The input drum is no different than the 4L60E drum, and the problem is the input shaft is different and will not work in an LS1 4L60E. And the problem with that is it's not common, that I know of, to remove and replace input shafts in input drums. And I'm sure there is no one taking 700R4 drums and swapping out the shafts thinking they're gaining something.

If anything you've got it backwards, it is common to use a 4L65E and 4L70E drum, they're made differently than both the 700 and 4L60E drums.

If anything you could have a cryogenically treated 700R4 drum swapped in with the proper shaft but it would be equal to a treated 4L60E drum.

 

I didnt blame my shift kit, i said it was my mistake to install one. And I worded it wrong. I knew 4th gear was the weak link in these trans so I did the servo. To me it felt a little weak, stock. I lost 4th after the servo. Oh well, I learned. Tranny still worked well without 4th even with shift kit in. Still, my built trans doenst shift as hard as it did stock with the kit. Thats cuz its done the right way. Thnx for your opinion anyway trick.