Second opinion on transmission???

[JJFlash]

I bought a 2006 2500 Mega Cab (repo) a couple of years ago.



It had 70K on the clock and was completely stock.





As soon as I got it home, I added the obligatory tuner, boost fooler, and intake.



The truck now has 160K on it, and the last 90K was spent at around 450hp/1000lb-ft.



I use it as a daily driver, and a weekly tow rig.



Weekends were spent towing:



1) 6000lb enclosed sled trailer

2) 9000lb toy hauler

3 12,000lb excavator



I've always been able to make auto transmissions last by avoiding excessive slippage, and religiously performing routine maintenance.



Recently, while pulling a 4500lb trailer, I had to stop on the freeway.



Getting moving again was a bit of a challenge.



Traffic was heavy, and I had to jump into an open spot in a hurry.



Near redline in first and second, I noticed some pronounced slippage. #@$%!



Once in third (with the T. C. locked up) all slippage disappeared.



In tow/haul mode (I always use T/H mode, as it locks the T. C. much more frequently) and manually pulled down into second, (T. C. locked) there is no slippage.



Bands are in adjustment, shifting is normal, the transmission is original and completely stock.



I am thinking that my T. C. is starting to go T. U... ... .



If it were the clutches, I think it would slip more in the higher gears when the T. C. is locked up.



What say all of you??



I'm certainly not complaining..... 160K on a stock 48RE, especially considering what it's had to endure over the last 90K, isn't too bad.



This may be the best vehicle I have owned yet.



The slippage isn't debilitating, and I could probably milk another 50K out of her.



What I'd rather do is add a triple-disk T. C. along with some billet band hardware, and top it off with an upgraded valve body.



I appreciate any and all input from the Gurus... ... ...

 

[cerberusiam]

Normal for a stock TC. When you get after it under a load they always seem to hit the limiter. The fluid coupling is loose to begin with so heavy towing and use will make it worse. It feels like its slipping but your just driving thru the converter stall is all.



You might be at the wear limit on all your clutches also with what you have been doing. A little clutch slippage will feel really bad.



My crystal ball is showing at least a TC in the transmission's future. :-laf Might be time to start looking for local trans builder to work with or pricing units form your favorite big name. I prefer somebody local but I do a lot of my own work and like a person to yell at face to face when it breaks.