2007 6-speed Transmission snake oil additive suggestions?

jerryv · Post by **jerryv** » 22 Jan 2020, 13:50

Im preparing my 2007 3.2L XC90 to tow a 1500-2000lb camper cross-country. I gave it the first and presumably only trans fluid flush at about 100k, now I'm at 125k.

There has been a rough 2-3rd gear shift since I got the vehicle and it seems to get worse with heat and hills. The flush seemed to smooth this out somewhat.

Anyone have good/bad experience with the "Lucas Transmission Fix", "Royal Purple", "Daryl's Supreme Liquid Transmission Mechanic" type additives for this type of Asin-Warner?

You think there's much sense in giving this "lifetime" fluid another flush before towing?

What's up with taking the car to a dealership to reprogram the shift patterns? Is this something I can do myself with my Chinese knockoff VIDA/DICE?

wanderdüne · Post by **wanderdüne** » 22 Jan 2020, 15:30

Which transmission fluid type and brand did you use and what method?
Don't reset the adaptive shift pattern.

jerryv · Post by **jerryv** » 22 Jan 2020, 18:54

It was Toyota Type T-IV I supplied, and I had a local indie shop do the deed, so not sure what their method was.

wanderdüne · Post by **wanderdüne** » 22 Jan 2020, 23:10

How much fluid did you supply?

but anyway,

I'd replace the fluid again before I tried an additive. Here's a couple of links:
This is more complete:
http://www.timthurber.com/volvo-xc90-3- ... c-6-speed/

But this is the method I'd use; 2 or 3 fills and drains.

jerryv · Post by **jerryv** » 23 Jan 2020, 08:44

I think I supplied 14QT? It was all based on the above article/video/forum posts I've read. I think I'll do the drain+fill with another 12QT and throw in a little snake oil for good measure. Still soliciting suggestions for which brand!

wanderdüne · Post by **wanderdüne** » 23 Jan 2020, 09:03

I'd go with lucas then, their other products seem to work well from what I've used.