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2007 6-speed Transmission snake oil additive suggestions?

Help, Advice, Owners' Discussion and DIY Tutorials on Volvo XC90s. The XC90 proved to be very popular, and very good for Volvo's sales numbers, since its introduction in model year 2003 (North America).
jerryv
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jerryv

2007 6-speed Transmission snake oil additive suggestions?

Post by jerryv » Wed Jan 22, 2020 1:50 pm

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
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wanderdüne

Re: 2007 6-speed Transmission snake oil additive suggestions?

Post by wanderdüne » Wed Jan 22, 2020 3:30 pm

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

jerryv
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jerryv

Re: 2007 6-speed Transmission snake oil additive suggestions?

Post by jerryv » Wed Jan 22, 2020 6:54 pm

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
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wanderdüne

Re: 2007 6-speed Transmission snake oil additive suggestions?

Post by wanderdüne » Wed Jan 22, 2020 11:10 pm

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
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jerryv

Re: 2007 6-speed Transmission snake oil additive suggestions?

Post by jerryv » Thu Jan 23, 2020 8:44 am

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
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wanderdüne

Re: 2007 6-speed Transmission snake oil additive suggestions?

Post by wanderdüne » Thu Jan 23, 2020 9:03 am

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

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