Wondering if anyone has a good idea to the problem on my 2001 WS6. It is an A4 with 243 heads and a TR224 cam. When the car is in drive and I'm simply cruising I can lean into the gas a little bit and there is a slippage shortly before the gear re-engages. If I drop the gear into 3rd, 2nd, or 1st it doesn't do that. Car has 87K miles and the tranny filter and fluid were changed about 15K miles ago in my garage. The car feels as if it is slipping unless I manually shift. I have done some minor changes with HP Tuners on it but I can't tell if I'm looking at a mechanical issue or a tuning issue. Care feels sluggish when in drive and stomping on the throttle unless manual shifts are used and then it pulls like a beast.

Any suggestions? In the future I was thinking of going with a slighter more aggressive stall converter, monster in a box rebuild kit and 3.73 gears.

 

If it slips in 4th but not 3rd, very likely your band is slipping probably due to excessive wear. Sometimes it slips first in 2nd then 4th and sometimes the other way around.

Here are some similar threads:
https://ls1tech.com/forums/automatic...t-trouble.html
https://ls1tech.com/forums/automatic...-gear-all.html
https://ls1tech.com/forums/automatic...ckup-help.html

Some people got a bit more life out of their trans by lengthening the servo pin as described.

IMHO the Monster rebuilt kits are not good - they have not been updated in 10 years and Monster has developed a bad reputation for service:
http://www.pissedconsumer.com/review...nsmission.html
Same if you look up their BBB record.

I have steered many people to rebuild kits from TruTechtrans and they have all been very satisfied. This assumes you have the desire, special tools, patience and money to rebuild it yourself. It is unlikely you will "save money" rebuilding it yourself. Besides the special tools, first time builders only have a about a 50% success rate and therefore incur additional costs and a great deal of time. But if you have the desire for personal satisfaction, go for it.

 

Excellent response and feedback. Very much appreciated.

 

Stock line pressure as received by the TCC can be
too low for aftermarket converters. Turning off the
"slip learning" (forcing min duty to 99%) might help
but the base problem is the 0% commanded line at
low pedal. On some OSes you have Trans General
Pressure which can up the delivered line when TCC
is locked. You can look at TCC Slip RPM and the
input/output shaft speed ratio to determine where
the slip is happening.

 

I think Jimmyblue is referring to TCC lockup slippage, not 4th gear slippage. This is often confused when people report that 4th gear is slipping.
Also you will feel more torque converter slippage in higher gears, which is normal.

 

My point was that he needs to figure out which is
really going on.

 

Exactly.