Transmission Fluid change on High mileage?
 

I would like Every members opinion on changing the trans fluid on a 2000 audi a6 2.8 v6 with 145000. Is it going to help prolong the car? Or mess the transmission up? I dont have any problems yet. Thanks for your advice.

It is a automatic triptonic transmission 5speed. Do I need to replace the clutch when I change the fluid? I have never had my differential fluid changed either but I had the dealer replace my transaxle case seal replaced. They charged me $450. Which I consider a rip off

Personally I feel it would be a good preventive measure to replace the ATF at 145k miles, along with the differential fluid. But that is just me...:)
No clutch to replace with the Tiptronic unless wou need to replace the clutch pack in the torque converter (doubtful) .

I opted to change the "lifetime" ATF and differential fluids in my 05 4.2 at 40,000 miles as preventive maintainance. The car shifted much smoother after the change.

Should I change the fluid on my own?

There is no correct answer to your question!
With 145000 you are far beyond the reasonable maintenance that should be followed.
Changing the fluid at this point is a pure gambling.
Not changing - gambling as well.
There are many reports here that doing first service at high mileage is nothing but trouble.
Judging by your understanding of the nature of cars-transmissions I'd strongly doubt you have the technical expertise to change the ATF by yourself.
Find somebody to do it for you, but do not expect miracles.

I have replaced transmission fluid on my chevy tahoe a few years ago when the mileage was 138,000. The fluid had never been changed and the truck currently has 156,000. It is running strong. That is one reason I feel that the fluid on my a6 should be changed. I am going to by the pump for the fluid and try to change it myself. I do not trust transmission shops at all. I feel they are out to screw you as much as possible.

There are a ton of horror stories where people change the ATF on their high milage Audis. nemohn is correct it is a pure gamble.

I have 210K on my 97 2.8 A6 and the only time I touched the ATF was when I had to add a little after I changed the radiator. We sold my daughters 95 A6 with 198K and never checked the ATF level. My friend has a 95 2.8 A6 with close to 250K and he hasn't changed his.

transmission oil change
 

It is a great preventive measure to change atf oil , i know on north american cars you can expect trouble , how ever i have a A8 with 80k and the transmission shifted from 1st to second when cold with a hard shift, but after warming the trans it was ok. after a oil change (from dealer under warranty) the transmission is like new. so...i would do the oil change and speacialy if you are going to keep the audi.