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aussie_paul


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I am not really sure about auto transmissions as I have never had one apart. I am noticing occasionally that the engine rpm rises as if we had dropped a half gear. I seems to be when heading up a slight incline with a head wind. I tow in direct drive 4th with the 2010 diesel Pajero auto.

Fuel consumption is 16.6 lts/100km. That is accurately worked out over several tanks with approx. 2/3rds towing and 1/3rd unloaded. Towing is between 90 to 95 kph.

Aussie Paul. smile

 



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Baz421


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aussie_paul wrote:

I am not really sure about auto transmissions as I have never had one apart. I am noticing occasionally that the engine rpm rises as if we had dropped a half gear. I seems to be when heading up a slight incline with a head wind. I tow in direct drive 4th with the 2010 diesel Pajero auto.

Fuel consumption is 16.6 lts/100km. That is accurately worked out over several tanks with approx. 2/3rds towing and 1/3rd unloaded. Towing is between 90 to 95 kph.

Aussie Paul. smile

 

Torque converter probably coming out of lockup into torque stage as you need the power. 



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blaze


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It will be what they call a lockup/unlock of the torque converter. When the torque converter is locked up it is like a manual gearbox with no slippage inside the torque converter, when it unlocks there is some slippage within the torque converter which is like your half a gear. When the torque converter is locked up, there is less heating up of the oil because that is created by slipping in the unlocked position. Let the computer of the vehicle work out the right gear. You are experiencing normal operation of the transmission
cheers
blaze

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aussie_paul


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blaze wrote:

It will be what they call a lockup/unlock of the torque converter. When the torque converter is locked up it is like a manual gearbox with no slippage inside the torque converter, when it unlocks there is some slippage within the torque converter which is like your half a gear. When the torque converter is locked up, there is less heating up of the oil because that is created by slipping in the unlocked position. Let the computer of the vehicle work out the right gear. You are experiencing normal operation of the transmission
cheers
blaze

 Thanks Robert. It has not done this at all prior to this trip. The selector shows that I am still in 4th.

Aussie Paul. smile



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Aus-Kiwi


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ATF colour look ok on dip stick ?

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Murraman


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I asked about this many years ago to a mate of mine who had an automatic transmission repair shop. He called it overdrive then lockup.

So if you start from a standing start going up a long uphill rise it will go 1st to 2nd, 3rd then overdrive then lockup. This is a 4 speed auto. So in effect you seem to have 5 gears.

This mob in Melbourne get mentioned a lot on the Nissan Forum about having better valve bodies for your tranny and you can have them modified so that they lockup in 3rd as well. When playing in the hills the lockup in third can be handy also towing a van.

www.automatictransmission.com.au/default.asp

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Aus-Kiwi wrote:

ATF colour look ok on dip stick ?

 The Pajero is one of a few remaining vehicles that still has a dip stick on the auto. Regularly check the colour and smell of the tanny fluid after a 'big' tow. This might be the difference between a service and a rebuild.

The Landcruiser does not have a dip stick. I have to rely a a device that allows me to monitor the tranny temp and act accordingly.

Larry



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Sparkster


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The Pajero that Aussie Paul has does NOT have a dipstick for the transmission.

I would suggest Aussie Paul have a look at the Pajero Forum where you will find a lot of information about what gear to tow in etc.

Apart from the Pajero Forum the transmission fellows will generally advise to only tow in manual and don't go to fifth, Just go as high as 4th-direct drive.

Paul, Google The Pajero Forum of Victoria, lots to learn there.

Keith....smile  



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aussie_paul


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Sparkster wrote:

The Pajero that Aussie Paul has does NOT have a dipstick for the transmission.

I would suggest Aussie Paul have a look at the Pajero Forum where you will find a lot of information about what gear to tow in etc.

Apart from the Pajero Forum the transmission fellows will generally advise to only tow in manual and don't go to fifth, Just go as high as 4th-direct drive.

Paul, Google The Pajero Forum of Victoria, lots to learn there.

Keith....smile  

 Thanks Keith, will do.

Aussie Paul. smile



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Aus-Kiwi


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Select sport or no OD mode.. The lock up converter is electro magnets locking converter..
If it's done more than  60,000 klmrs ?
I would change the fluid.. There is NO such thing as sealed for life!!
More like sealed till out of warranty!! Then it's your problem..
Be aware these days .. Most coolers have coolant going through them to HEAT ATF to engine temps..
Which is good ! BUT they can or have been known to leak on some vehicles . Coolant in your trans is "bad" news..
IMO the fix here is simply to disconnect and fit a normal transmission cooler..



-- Edited by Aus-Kiwi on Thursday 21st of August 2014 09:26:00 PM

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aussie_paul


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Aus-Kiwi wrote:

Select sport or no OD mode.. The lock up converter is electro magnets locking converter..
If it's done more than  60,000 klmrs ?
I would change the fluid.. There is NO such thing as sealed for life!!
More like sealed till out of warranty!! Then it's your problem..
Be aware these days .. Most coolers have coolant going through them to HEAT ATF to engine temps..
Which is good ! BUT they can or have been known to leak on some vehicles . Coolant in your trans is "bad" news..
IMO the fix here is simply to disconnect and fit a normal transmission cooler..



-- Edited by Aus-Kiwi on Thursday 21st of August 2014 09:26:00 PM

 Thanks, she has done 117k and I have had her since 112k earlier this year. Still in warranty until November so need to make sure all is ok.

I tow in 4th which is 1 to 1 ratio.

Aussie Paul. smile



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