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Auto gearbox lose revs on down shift 

 

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 Post subject: Auto gearbox lose revs on down shift
Posted: Thu Jan 21, 2010 6:38 pm 
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Location: Brisbane
QLD, Australia

Not sure if there is any other posts on this issue. EL Falcon

Only just started a week ago, when I shift back into a lower gear instead of the revs kicking up, it seems to engage the auto clutch and sit at idle. Than if you press the throttle the revs come back until you back off the throttle than back to idle. Very annyoying, as I like to use the engine compression to slow down. Could this be a relay, switch or solenid issue? And if anyone knows the location of it.

Cheers
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 Post subject: Re: Auto gearbox lose revs on down shift
Posted: Thu Jan 21, 2010 7:31 pm 
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Ride: el xr6, r33 series 2 skyline

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i havent had the exact problem
my car used to slow down really well using the engine but doing it more and more iv noticed after 6months that my car doesnt slow down no where near as much even if revs are like 3,500

so mabye mines leading into your problem

 

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 Post subject: Re: Auto gearbox lose revs on down shift
Posted: Thu Jan 21, 2010 9:44 pm 
Getting Side Ways
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have u checked the fluid? probably not your problem, but my mate had this problem in his vr commodore and it was low fluid..

just a suggestion
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 Post subject: Re: Auto gearbox lose revs on down shift
Posted: Thu Jan 21, 2010 10:04 pm 
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Yeah, the gear box has had a full service a few months ago. It still runs fine if you leave it in drive, but thats not me like to be able to use the gears.
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 Post subject: Re: Auto gearbox lose revs on down shift
Posted: Sat Jan 23, 2010 1:40 am 
Getting Side Ways
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Hi. The most likely culprit is the Inhibitor switch, which is mounted on the left side of the gearbox. You can try cleaning all the plugs etc, but if this shows no change, source a good second hand or new one.

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BenJ

 

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 Post subject: Re: Auto gearbox lose revs on down shift
Posted: Sat Jan 23, 2010 1:52 am 
Getting Side Ways
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Location: Park Central
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i had the exact same problem, just top up the fluid and its all good

 

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 Post subject: Re: Auto gearbox lose revs on down shift
Posted: Sun Jan 24, 2010 8:59 pm 
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I will give that a go BenJ, thanks. The fluid should be fine has not leaked and it has had a full gearbox service. Will check fluid anyways. Cheers, will let you know it goes
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 Post subject: Re: Auto gearbox lose revs on down shift
Posted: Sun Jan 24, 2010 10:12 pm 
Getting Side Ways
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Don't drive it around manually down-changing. It will f**k that particular clutch in the auto very quickly. CJH and XPvanman can tell you more, they seem to be the auto gurus.
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 Post subject: Re: Auto gearbox lose revs on down shift
Posted: Sun Jan 24, 2010 11:24 pm 
Getting Side Ways
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SLO247 wrote:
Don't drive it around manually down-changing. It will f**k that particular clutch in the auto very quickly. CJH and XPvanman can tell you more, they seem to be the auto gurus.


shouldnt affect it when i had my ed i was down manually down shifting all day everyday for a whole year and no issues

 

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 Post subject: Re: Auto gearbox lose revs on down shift
Posted: Wed Jan 27, 2010 9:03 pm 
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Autos are designed to manually shifted the whole idea of an automatic was you still can drive it manually with out using a clutch. Using the gears saves wear on brakes. You only screw it up by being stupid.
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 Post subject: Re: Auto gearbox lose revs on down shift
Posted: Thu Jan 28, 2010 4:02 pm 
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Ride: Falcon AUII XR6 HP

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i had the same prob with mine, i found out that my torque converter was screwed because when i pulled the box apart, the clutch packs looked alright and i am currently driving around with a new box but same inhibitor switch!!! my is in an au1 99 but they should be almost if not the same box!!

thats my diagnosis anyway, hope it helps

Nathan

 

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 Post subject: Re: Auto gearbox lose revs on down shift
Posted: Thu Jan 28, 2010 4:35 pm 
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It's one of the clutches that has gone. Your gearbox is fine otherwise. I drove for 100,000kms with this condition in my EB's previous gearbox before it died from unrelated causes (trans cooler hose split, box cooked @ 110kph).

 

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