850R AUT hard shifts

Sommerfeldt · Post by **Sommerfeldt** » 24 Jun 2016, 15:56

Hmm... power flushing these transmissions isn't recommended at all - it's common for that kind of treatment to dislodge sediments/damage seals. The recommended way to do it is "drain and fill", i.e. a slow drain, then replacing the drained amount. Then again, and again until the fluid's the right color.

There's a definite possibility that you've got internal damage because of the flushing, and the hard shifting and pressure loss supports that, I'm afraid.

- S

kevinwalter · Post by **kevinwalter** » 24 Jun 2016, 16:48

Hmm, that's the first time I've heard that.

Just found out the following:

Maybe try Mannol instead of Ardeca? Just to check if it's not the oil.

Sommerfeldt · Post by **Sommerfeldt** » 24 Jun 2016, 16:55

It's pretty much all over the forum.

Remember that Volvo didn't intend these transmissions to even have the oil changed at all.

0.5 bar is a pretty serious pressure loss - it's worth a shot of course - it probably won't hurt. But, with a pressure loss like that, damage to internals has to be on your radar. I'm surprised that you get no DTCs from the tranny with that kind of deficiency, though...

- S

kevinwalter · Post by **kevinwalter** » 11 Jul 2016, 10:54

Alright, have had some days off so I did not work on my car.

Could it be a bad line-pressure solenoid or a a bad wiring-harness to that solenoid?
Is it possible to test that solenoid?

I'm still not convinced that it's my transmission because it's shifting exactly like the one I've had before.

kevinwalter · Post by **kevinwalter** » 13 Jul 2016, 03:48

Just found out a nice document about measuring the resistance of the solenoids. It should be almost the same at the TCM side. If it's not you've got a wiring problem.

I'm going to check this in the weekend. Hope for the best....

http://www.vectra-club.ru/images4faq/ov ... 0-42LE.pdf

kevinwalter · Post by **kevinwalter** » 13 Jul 2016, 23:33

The resistance of Solenoid 2 a bit more then 15 ohms. 15,8 ohms exactly. Could that be a bad solenoid?

simonology101 · Post by **simonology101** » 14 Jul 2016, 01:25

When it shifts it vibrates you say..... Motor Mounts my friend and the upper tranny mounts as well. it sounds good though.

kevinwalter · Post by **kevinwalter** » 14 Jul 2016, 01:31

No, it does not vibrate anymore. It just shifts hard.

Found out that a connection on my TCM was a bit smugged. It appeard to be the TPS sensor wire. Cleaned that and it shifted a bit smoother. Still a hard bang in Reverse...

My idle is almost 1000 RPM. +- 980? Is that normal?

Post by **hausmeister** » 14 Jul 2016, 08:38

idle should be 850rpm

kevinwalter · Post by **kevinwalter** » 14 Jul 2016, 09:22

hausmeister wrote:idle should be 850rpm

So this is a bit to high?

850R AUT hard shifts

Re: 850R AUT hard shifts