slipping with the 5.3 was a sign that something was wrong, as much as i hate to say it i been told a few times by builders in my area that they can build a tranny to hold whatever i throw at it ( yeah right ) just to blow them the following weekend at the track, thus going to the pro's , frank at performabuilt and or vince at FLT reguardless the added power just finished it off..


should be under warranty right?

 

I would think since it started since the tune its something in the tune. I bought a truck one time with a built trans and bolt ons that was tuned by a sponsor on here and was told the trans was bad when I bought the truck. I just took a gamble and put a stock tune in it and all the transmission problems went away. I bad transmission tune can make a transmission do funny things and easily burn itself up.

 

It was acting funny before the tune, slight slippage, but I had attributed it to a messed up motor causing the PCM to flake out.

Took it in today to get it checked out. Dropped it off, picked up the rental.
Get a phone call about an hour later....Couldn't evaluate it.

The F****NG REAR END BROKE! Sounds like spider gears with the crunch crunch crunch on corners. Had to pay $100 just to open the diff.
Unknown cost ahead....

 

Ouch! You just cant win... I replaced my trans about 3k miles ago and I think my 5.3 is on it's last Leg... its down on power and it almost sounds like a rod knock. The weired thing is, it comes and goes and I still have good oil pressure.

 

No kidding, looks like I'll have an expensive bill coming my way. Not sure how I'm going to pay for that one. Might have to work a corner of 8 mile and McNichols in Detroit. (Just dont throw pennies)

Mine was sludged up badly from bad head gaskets. Mine would sound like a rod too at times, but moreso the lifters. Once the lifters would quiet down, you could hear the rod...every once in a while start doing a deep tap tap tap tap then quiet down.
I went to start it to go grocery shopping and no oil pressure - pump couldn't prime due to the cold sludge. Pulled the drain plug and nothing came out - that is until i stuck a screwdriver in the hole to "pop" the sludge cap.

My power was also way down, and that's partly why I thought that mabee it was the 5.3L causing the trans issues. It would do a long delayed shift into 1-2 and every once in a while 3-4 would have a longer shift. Almost like a slide bump. That was around June. Pulled the motor in late august.

For those who have performance built transmissions and tunes - did you leave the factory settings for the trans? What helped/didn't help if you had issues?
Minytrker - noted, because im dumb on tuning, was it a specific parameter set you copied over, or the entire trans table set?
Thanks!

 

After discussing it with a freind I believe it's related to the cam and lifters. sounds similar to a rod knock But the oil pressure is good. Did a flush to day and thought it was good. then I put new oil and filter and I started hearing it again. I believe It has something to do with the first design Roller lifters. I have an 00 5.3L

Do you need gears??? I have a brand new set of 3.73 with the basic install kit.
I ended up getting a take out rear end that I am gonna swap my brakes on to.

 

I left my trans pressure stock and only adjusted shift points and lock up un lock tables to better suit my driving.

 

I appreciate the offer. I'm dead in the water with a rental car and very limited funds, so I just had him put new spider gears in it until I can save enough cash to build the rear end with the locker. It wasn't too bad for cost to keep me going through the winter.

I spoke with my trans builder and my tuner. Kind of getting the finger pointed at eachother...but both are very willing to work with me, so baby steps.

The tuners suspect for the wierd slippage at 1-2 low speed and 2-3 WOT was the HD 2-4 band and the drum. Apparently the trans builder used the old drum for the HD 2-4 band. He says its not a problem, but the tuner said it's a must. I thought I read somewhere you had to watch the width of the bands and make sure you match accordingly...so we'll see. Not sure where to go if it's a stalemate.

 

Sorry to hear about the trans issues, but I agree that it was probably going out before the tune, and the tune may have exacerbated things if Tq. management was removed. My personal rec on the trans settings is to set the line pressures to the stock tow/haul pressures (would make sense that these pressures are what GM determined to give the trans the most strength/longevity), reduce the shift times down to .2, and reduce tq. management by 40%. That's for a bone stock trans. These settings have always worked well for me, both with the 4l60e as well as my 4l80e now, with the exception the 4l80e doesn't need any torque management.

 

I got it back today. He couldn't get it to slip like I showed the previous tech, so not sure if thats good or bad. No shavings in the pan. He did take the 093 servo out and installed a "Super Servo". It didn't slip low speed, so hopefully it's fixed. Have to wait for dry roads to see if the upper end slips.
I'll also talk with my tuner to get things put back to the way they should be. TQ management was removed, but most of the rest was left alone. I believe he did say the shifts were set to 0.2.
At least I'm mobile for winter.