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Old 12 November 2012, 14:18   #21
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Modern cars and automatic gearboxes are smarter than the driver so younshouldnt have any problems at all. All I would say is the mileage for a rebuild is 60000. They don't build them to last I am pleased to say. Alan P
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Old 13 November 2012, 02:57   #22
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Sorry Alan, what I was asking was how well (or for how long) can an auto box/torque converter handle major amounts of slip as it slowly hauls the boat up a steep incline. What happens if you over-do it? Is it a case of temporarily overheating the transmission fluid which will fix itself if allowed to cool, or is it some business for you :-)

Richard
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Old 13 November 2012, 03:03   #23
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You wont break it and it wont overheat, the ECU will not allow it Alan P
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Old 13 November 2012, 04:39   #24
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We have managed to overheat the auto gearbox on our Honda Odyssey '04, due to the car being on full load and lots of high-speed driving in the italian heat up mountains. The Pressure relief valve popped, and the whole car was well oiled afterwards
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Old 13 November 2012, 05:26   #25
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Quote:
Originally Posted by Alan Priddy
You wont break it and it wont overheat, the ECU will not allow it Alan P
As Alan said ... Most modern ecu controlled serious 4x4's - as opposed to 'soft roaders' - won't allow any fluids to overheat. Once over the threshold, transmission fluid is scrap and doesn't recover.

LR transmission cooling is spec'd for max weight (GTW), max gradient, max ambient temp. Any external factors that would threaten this - debris clogging of a radiator, for instance - and the ecu will revert to limp home mode by reducing engine power.
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Old 13 November 2012, 13:24   #26
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Quote:
Originally Posted by Alan Priddy
You wont break it and it wont overheat, the ECU will not allow it Alan P
Er don't think so volvos are renowned for over heating when towing they don't put a big enough oil cooler on for starters
Low box is always handy to have
Also you want to see if the auto box on what ever car you get is designed for that like the land rover ones and not nicked out of something else they make and is not up to the job
Most autos are sealed for life these days but it still pays to have the ATF changed when its got high mileage
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Old 13 November 2012, 14:00   #27
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I was talking about MODERN CARS not old fashioned ones. For us 2004 is old and not our Market as the value of the gearbox is greater than the value of the car. Most of our work is centred around 08 up. The newer Volvos are ok. I have only been doing this job for 43 years! Alan P
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Old 13 November 2012, 14:11   #28
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Quote:
Originally Posted by Alan Priddy
I was talking about MODERN CARS not old fashioned ones. For us 2004 is old and not our Market as the value of the gearbox is greater than the value of the car. Most of our work is centred around 08 up. The newer Volvos are ok. I have only been doing this job for 43 years! Alan P
So am I and I am going from what I have seen and experienced my self and from others
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Old 13 November 2012, 14:20   #29
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Old 13 November 2012, 14:28   #30
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Quote:
Originally Posted by Richard Selman View Post
Thinking about changing out the Navara. Its been pretty good however where I launch I need to use low ratio to save the clutch and I've wound up the transmission a few times climbing round the bends. Was thinking about getting a new one with an auto box to limit low ratio use however I really wanted the next vehicle to have full time 4WD.
I made this change on my Rexton .. cant say I'm that impressed on the theory, although the motor is fine, the newer one is full time 4WD but it still has a selector for Low 4 and cant be done on the fly IIRC .. also .. fuel bills a good bit higher with the auto that said making some tea, watching a DVD whilst eating a sandwich and being on the phone at the same time on the move, is a breeze
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