backdoc

I have a 97 A8 with 137k miles on it. I had a transmission service done at 99k(fluid/filter). Before the service, I had the hunting issues, but after the service, none. I am having no apparent problems now, just the thump when coasting an low speeds in town. I just did a search and spent an hour reading posts about to change the fluid/filter or not, what fluid to use etc... I couldn't find a definitive answer as to what to do in my situation. Should I leave the transmission alone, should I change the filter and fluid, should I just change the fluid, what kind of fluid, should I just check the level? Thanks for any help.

Doug

JimTheBarber

If the thump is occurring when you are slowing down, it means that the torque converter is starting to show signs of wear, if I recall correctly.

brunnhizzle

glad I stumbbled upon this, I was going to check fluids. thanks

rangervr4.2

If you read all the posts you can go crazy. I looked at Tozo's and CalG's and decided that filter/fluid changes are a good thing. I went with Mobil 1 synthetic fluid and a generic filter on my 2001 S8 (78m miles). So far, so good. When I had the transmission on my A8 rebuilt @ 100m miles, the shop owner suggested I change the fluid/filter every 30m miles. Hope this helps.
Phil C