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Gearbox service

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Old Feb 24th, 2021, 23:10   #21
sellxc70
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Originally Posted by ferg55 View Post
I would avoid using a garage that flushes the box with a machine (i.e under pressure) this has been known to cause harm to the valves etc.

You don't need to pressure-flush it anyway - the proper method (Volvo approved) is to disconnect the pipe from the intercooler and let the box pump the oil out of the torque converter and internals by itself (aka Gibbons method).
I would put the Gibbons method above the drain and fill option and flushing if you are not comfortable with going that route.

The flushing problems generally relate to machines that backflush the transmission. Forward flushing in the same direction as the oil flow seems to be a safer option. However this is a topic where data and results are difficult to come by.

The AWTF80SC seems to be a fairly robust transmission which should last with a periodic oil change.

Steve
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Old Feb 24th, 2021, 23:12   #22
Kev0607
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Quote:
Originally Posted by ferg55 View Post
I would avoid using a garage that flushes the box with a machine (i.e under pressure) this has been known to cause harm to the valves etc.

You don't need to pressure-flush it anyway - the proper method (Volvo approved) is to disconnect the pipe from the intercooler and let the box pump the oil out of the torque converter and internals by itself (aka Gibbons method).
The garage I use just does drain & fill. They didn't disconnect the pipe from the intercooler on mine for sure.

No, I wouldn't pressure flush it.

Quote:
Originally Posted by XC90Mk1 View Post
I have Vida but you donít need it. The level is set (from memory) at 50/60 C.

It took my XC90 20 mins to get to 50C and then sat stable for 25minutes and didnít rise.

I tried driving without adaptation reset and with abs didnít notice a difference.

Re reusing the washers. Itís a good point to replace but I certainly had no leaving and fitted new washers on the last drain.

There is no need to take this to anyone or to have a specialist do it. Once done once you will be able to do it in 30 minute intervals, possibly 15. I understand Toyota fluid is to same spec and much cheaper.
I'll reuse the washers in the first instances, but replace them with new ones on the final drain & fill.
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Last edited by Kev0607; Feb 24th, 2021 at 23:15.
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