keithjh Posted September 7, 2014 Share Posted September 7, 2014 Hi All, I have a 300TDi 110 which I have converted to Auto. When the vehicle has been stood overnight, it will not change up into second until I am doing 3000RPM or over. The rest of the gear changes are fine. Once its warm the gear changes are no problem only when its cold . The other problem is that it wont drop into "Lock Up" until I am doing 65 MPH. In the Disco TDI it dropped into lock up at around 52MPH. The Transfer Box is the original Defender one. Any thoughts ideas fixes etc etc Regards Keith Quote Link to comment Share on other sites More sharing options...
Paul Woodward Posted September 7, 2014 Share Posted September 7, 2014 The slow change is caused by debris building up in the governor. Sometimes you can fix it by changing the fluid and filter a few times, then clean out the governor. Cleaning the governor is easy but you have to take the transfer box off and remove the rear housing of the gearbox. In theory the gearbox should lock up earlier with the lower ratio transfer box, so not sure whats going on there?? Copied from the Ashcroft Transmissions website; 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. Quote Link to comment Share on other sites More sharing options...
Mudmonkey Posted September 8, 2014 Share Posted September 8, 2014 Sorry to say Keith but my Disco used to do this daily, it only stopped doing this when it decided to shoot it's own oil out of every hole and seal that it could at 70mph on a dual carriageway, resulting in no drive. That was new box time for me! As said, change fluid and filters, I read somewhere about removing the governor and cleaning it up which can solve it. Just don't decide to live with it as it could end as catastrophically as mine did! On an off topic note which part of Doncaster are you from? Quote Link to comment Share on other sites More sharing options...
tacr2man Posted September 8, 2014 Share Posted September 8, 2014 Have you got the kickdown cable set properly , as even with a discovery 1.2 transfer box it should drop into TCLU at around 50/52 mph ? With the defender 1.4 it should be even earlier ! Quote Link to comment Share on other sites More sharing options...
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