850 ATF flush index

850 Automatic Transmission Fluid (ATF)
- Notes on Flushing

Why

Here's one of the best essays you will find on the web regarding why it is important to flush ATF, despite what manufacturers may say regarding the lack of necessity to flush. Of course the bit on changing ATF fluid via "drain & fill" is generic information: if you have an 850, in my opinion, it is much easier to follow the modified Volvo method as detailed below &/or on Bay 13.

Here's an essay on the fundamentals of ATF.

How

Here's the OzBrick (updated August 2001)
METHOD to flush ATF.

Here's the link to the Volvospeed/Bay 13 method also with pictures

Here's a discussion thread from Volvo-Net (or Swedishbricks?) - important for the first item which talks about the danger in letting your tranny run dry when flushing.

Remember that using the method above (& Bay 13) is the Volvo recommended method, so there is nothing wrong with this: just do it properly! Which means turning off the engine when you get bubbles coming through that clear tube, and inserting more ATF. The thread goes on about other topics relevant to trannies which may or may not be of interest, and largely relevant to older models.

Here's another thread discussing the need to turn off the engine and tools to deal with the hose clamp.

A quick mention of the benefit of monitoring tranny atf output levels when doing the ATF flush.

Can you insert the ATF into the top port of the cooler when flushing?

How to add an aftermarket ATF cooler to your auto transmission.

What	Here's some specs on AMSOIL, Mobil 1 & Royal Purple ATF Here's some discussion on ATF Detergents causing problems with the BAY 13 flush method, & Synthetic Mobil 1 Vs Synthetic Amsoil ATF. A discussion on atf for late model V70s

also see automatic transmission section.

If you have any experiences, facts, hints comments or data that you think might be useful on the site, please

and I will post it, with an acknowledgement of your contribution (if you so wish).