GdlmngEngnr Posted May 28, 2018 Report Share Posted May 28, 2018 My Ford Galaxy MkII, 2002 automatic (102,000 miles) has a gearbox problem. Normally it's fine but occasionally (every 50 miles, say) the engine will rev freely as I drive along. Like it's been put into neutral, but I didn't do anything except accelerate or drive up a hill.It can be fixed by letting the car slow down to about 30 and putting the gearbox into top gear using the manual positions on the gear stick. Then it's back to normal.We had the garage partly change the transmission oil 6 months ago to try to fix this. Apparently the oil was in a poor condition. When I got it back it might have helped a bit with the gearbox problem but it's hard to be certain.Any advice welcome. e.g. Would a full transmission oil change help? I've been quoted £200 for that which I could live with if it fixed the problem. Quote Link to comment Share on other sites More sharing options...
BrianH Posted May 28, 2018 Report Share Posted May 28, 2018 Its impossible without special equipment to do a full fluid change in one hit (some of it will remain in the torque convertor and other bits). The usual way to do it is change as much as possible, run it (can be better to run it for a few weeks in this state) then repeat the drain/refill a second time (this allows the new oil to mix with the old stuff and break it up somewhat, as well as circulate it as far as possible). A low level of the oil won't help either though, if its leaking anywhere it will get progressively worse as the oil drops, So checking the actual condition and level of the oil now would be the best start, That will give you an idea where to go (if it looks like tar then it certainly won't be helping any). There is some info on checking the oil in the faq section here, it may be worth a read of that? Quote Link to comment Share on other sites More sharing options...
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