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300tdi Auto


jules
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I'm using a 300 tdi Auto which has a problem

when driving and mainly pulling away from say the lights it will drive away as normal but not change up until flat out (4500 revs)then lift off and as the revs return tick over before it will change up into what I think is 3rd and it is not changing into 2nd at all. its will drive normally as long as you don't stop as when changing down it will change into second but not up.

Has anyone had this and is it repairable or just bin it and replace the box all together

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Nicked from the Ashcroft site, this sounds similar:-

I have a 4 speed ZF Auto and it sticks in first gear in the morning or when cold and is reluctant to change up from 1st gear. Once the gearbox has warmed up it shifts normally. Why?

The governor valve is sticking, which can be caused by contamination. i.e. clutch plates or other parts disintegrating. The fine debris finds its way past the filter and tends to accumulate in the governor, causing it to stick. A temporary solution is to remove and clean the governor. The problem will often recur as debris from damaged parts continues to build up in the governor. If the problem continues after cleaning the governor then it may be necessary it replace your Autobox.

We have noticed many customers reporting this fault starting a few days after an oil and filter change and after researching this using our experience and the expertise of others in the trade we have come to the conclusion that as ATF oil is a detergent type oil, when the oil is changed this will dislodge and stir up settled debris in the autobox which in turn jams the governor valve. In light of this although it sounds controversial it is debateable if changing the oil and filter is a good idea, some say if the box it going to fail it will fail if the oil is good or bad and their advice is leave it alone. I am still undecided but the truth is I get a lot of calls from customers thinking they are looking after the autobox by servicing it and a few days later this fault occurs.

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