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Gen 2 Auto box not unlocking clutch before down shifting

Posted: Mon Feb 03, 2014 8:47 am
by Forest Fab
Hi guys,

So on my Gen 2 3.5 V6 auto, the following happens:
When shifting up form 3rd to 4th, the torque converter is unlocked, and then locks with a decrease in rpm of about 300rpm. All normal.
But when I'm going up a slight uphill and press on the throttle a bit, the box shifts straight down to 3rd, without unlocking the torque converter in 4th first... I've tried in normal A/T mode and power mode, I tried by very gently pressing the throttle, but there's nothing to do, the box always goes straight down to 3rd, and up to 4th unlocked, then locked if I release the throttle a bit.

Is this what the box is supposed to do? As far as I know about auto boxes, it shouldn't do that, but can someone confirm?
I've got an oil and filter change on my to do list, as there's also a slight slip going from a stand still when hot. And the lady's got a few kms on the odo and I'm not too sure how the previous owners treated her.
The TPS is also acting funny sometimes, so I thought maybe a jump in resistance value could be interpreted as a kick down command, therefore skipping the unlocking of the torque converter, but I've tried at different pedal positions, so I doubt this is the cause.

Any ideas or advice are welcome.

Thank you.
Fabien.

Re: Gen 2 Auto box not unlocking clutch before down shifting

Posted: Wed Feb 05, 2014 5:57 pm
by Forest Fab
So no one's got a Gen 2 or 2.5 with an auto box to enlighten me? :cry:

Re: Gen 2 Auto box not unlocking clutch before down shifting

Posted: Wed Feb 05, 2014 9:58 pm
by ghost_traffic
Sorry I can't help, but the best advice I can give is to make contact with 4ePajero.

He knows all there is to know about Pajeros. :D

Re: Gen 2 Auto box not unlocking clutch before down shifting

Posted: Thu Feb 06, 2014 9:10 am
by Forest Fab
Thanks, let's see if he comes around here :)

Re: Gen 2 Auto box not unlocking clutch before down shifting

Posted: Thu Feb 06, 2014 11:33 am
by 4ePajero
ghost_traffic wrote:Sorry I can't help, but the best advice I can give is to make contact with 4ePajero.

He knows all there is to know about Pajeros. :D
Wrong!
I only pretend. :D
Marius (4ePikanini) knows much more about the auto boxes than I do.
If he does not pitch in, send him a PM

Re: Gen 2 Auto box not unlocking clutch before down shifting

Posted: Thu Feb 06, 2014 11:46 am
by Forest Fab
Thanks guys. I'll be patient, I've already bothered him with question about a Touareg a little while ago :oops:

Re: Gen 2 Auto box not unlocking clutch before down shifting

Posted: Thu Feb 06, 2014 12:09 pm
by Bigwill
Question: Has this car behaved differently in the past?
If it is anything like the Gen 3 which has an inclinometer built into the box, you can expect the box to behave differently when going up an incline than it would do on a flat. i.e. The car knows it is going up an incline and the logic takes that into account resulting in a more aggressive change pattern. Just a thought...

Re: Gen 2 Auto box not unlocking clutch before down shifting

Posted: Thu Feb 06, 2014 12:19 pm
by Forest Fab
I didn't know about that on the Gen3, that's quite clever. Not sure if it applies to the Gen2s though.

And to answer your question, no it's been behaving this way since I've got it.

Thanks!