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Information Needed - Al4 Gb Question


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#1
bm_dp

Posted 01 September 2011 - 01:42 PM

bm_dp

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Don't worry. This is not another AL4 bashing thread.... lol

This question is for owners with AL4 auto GB (Ulysse I and also Ulysse II [Nuovo] ).

Just had my GB rebuilt and experience following:

Whenever i remove my foot from the accelerator pedal (from vehicle speeds between 40 to 110 km/h), the RPM reading drops immediately from 3000rpm to about 1000-1500rpm. The car feels like its in neutral. The engine tends to be revvy (upwards and vice-versa). Before I had it rebuilt, I would get the engine braking effect, ie. the RPM reading would drop gradually with the vehicle speed and gear changes too, but after rebuilt it feels like in 4th gear all the way whe you are decelerating, even if the speed reduces to a point where my previous GB would have downshift to 3rd, it still remains.

I have never had a new GB to begin with, so no reference point...

Question: Does your car feels like that too? Hope you can share your experience. Thanks.

#2
GURJIT

Posted 02 September 2011 - 08:52 AM

GURJIT

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Although I can't offer you help here, I noticed most of the new launches from Peugeot have Aisin gearbox installed unlike in previous models AL4 gearbox was the preferred choice.

Even Alfa Romeo that uses automatic gearbox has started using Aisin gearbox eg in their 159 (3.2V6-Auto version). This is probably due to high failure rate in AL4 gear boxes.

I dunno if these Aisin gearboxes can be retrofitted into older models but if they can be done then there is something to look into.

Cheers.

#3
bm_dp

Posted 03 September 2011 - 04:09 PM

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Gurjit,
Thanks for the response. Informative indeed. My guess abt your suggestion would be too complicated since it involves electronics... not just h/w but s/w too. Remember that ECU and TCU needs to be integrated and that requires very intimate knowledge and tools too. Not exactly the kind of thing that you'd find around easily... plus the trial and error testing bit..


#4
bm_dp

Posted 30 September 2011 - 10:25 PM

bm_dp

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QUOTE (bm_dp @ Sep 3 2011, 04:09 PM) <{POST_SNAPBACK}>
Gurjit,
Thanks for the response. Informative indeed. My guess abt your suggestion would be too complicated since it involves electronics... not just h/w but s/w too. Remember that ECU and TCU needs to be integrated and that requires very intimate knowledge and tools too. Not exactly the kind of thing that you'd find around easily... plus the trial and error testing bit..


I have the answer already. Thanks for looking.

#5
bm_dp

Posted 20 February 2012 - 02:48 PM

bm_dp

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my 6 mths warranty almost up, not happy with some no so smooth gear changes between 1 & 2, i sent it back to teh mech for checking. Was told they G/box mech change my solenoids and adjusted some things.. (not ver sure what they meant by that)... anyway, got my car back and drove it, it now feels just like before I sent the G/box for overhaul, meaning the engine braking effect is back!! when you take your foot off the gas pedal...

This just goes to show that my initial description above is not the correct thing if you get your g/box overhauled.

The gear should stay engaged (hence the engine braking effect) until RPM drops to about 1,300 rpm, the you feel the gears dis-engaging and you get that free Neutral gear position feeling.

The mech must have thot they could get away wit this.... so this FYI folks. Other than that, it drives beautifully now...