- Joined
- Jan 21, 2005
- Messages
- 30,128
- Location
- Mittel England
- Car
- Smart ForFour AMG Black Series Night Edition Premium Plus 125 Powered by Brabus
I’ve read and heard that there’s an increased risk that a well-worn torque converter at the end of it’s life may begin to slip - or slip even more than it did before - if the fluid is fully drained and replaced.Draining out the TC removes friction material,needed to drive the gearbox. Which is why it's not drained at most garages. It can shorten the life of the drive system. There were posts on here recently that brought alot of facts to light for alot of us.
Prices where I live are around the £270 mark. I paid £380 and that was for a 9g which is even dearer ....
The relevance being that many “resort” to having the fluid changed in the hope that it will fix an issue, but in practice it might make it worse if the cause is that the torque converter is already at end of life.
In that scenario, replacing the TC is the right and most cost effective fix, not leaving tired fluid heavy with friction particles in the transmission. Replacing the fluid then changing the TC soon after would be a waste.
A healthy transmission will perform better with clean fluid and the least friction material possible.