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Post by alexstringer on Dec 2, 2010 22:54:30 GMT
when changing from 3rd to 4th my engine revs up and slips. should i be worried?
is this normal?
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Post by shoutforjoy on Dec 3, 2010 8:58:34 GMT
Hi and welcome to AMR.
This is not normal but is a common fault with auto gearboxes.
Sometimes gearboxes with this fault can go for thousands of miles but it will need to be sorted at some point.
Are your oil and filter changes up to date? Slips like this can be caused by using old and tired oil or by not having sufficient oil in the engine. Oil changes are recommended every 2-3,000 miles. There's advice on here about choosing the right oil and how to check the oil level (it's a bit different than on a manual car).
If the oil is OK then your gearbox will need some attention. There's some advice and topics on this forum if you want to do it yourself otherwise you'll need an auto box specialist to look at it.
hth, Paul
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Post by jockduck on Dec 3, 2010 10:09:49 GMT
This "flaring" is common with cold oil, does your car do it hot and or cold? The early boxes were worse because the oil feed to the top/reverse clutch was restricted, later cars should be better.
Heavy 'flaring" will wear the clutch, a sympathetic driver should be able to reduce the condition, Otto has always done it when cold but the 'box has now got 30000 miles on it since rebuild and otherwise its good.
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Post by (minisniper) on Dec 3, 2010 18:32:24 GMT
when changing from 3rd to 4th my engine revs up and slips. should i be worried? is this normal? Hello I have to agree with the others have said. You could try a oil and filter change and go from there. Also it you might get a better response if you introduce yourself in the introduction section first  |
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Post by alexstringer on Dec 4, 2010 10:25:29 GMT
i changed the oil about 3 months ago, it does happen more when its cold.
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Post by (minisniper) on Dec 4, 2010 19:56:24 GMT
i changed the oil about 3 months ago, it does happen more when its cold. What oil do you use? and how many miles have you done since your last oil change? Plus the oil takes longer to warm up in this cold weather |
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Post by hairydad45 on Dec 24, 2010 18:46:43 GMT
Does this flare-up happen only when under acceration in Automatic mode ie selector in D.
Do you get the same symptoms when under light load, and how about when you do a manual shift from 3rd to 4th, and say if your in top doing 40mph then kick down to 3rd and full throttle till the box changes up at around 55-60 mph ?
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Post by clubman on Jan 28, 2011 0:14:28 GMT
I'm also new here , but once I've read that sliping when changing from 3rd to 4th could be just the bands that need adjustment.
Tito
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Post by mra-minis on Jan 29, 2011 8:16:38 GMT
Ok 3rd & 4th.......
Top and reverse clutch pack seals and plates
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Post by tony105 on Jan 29, 2011 13:02:02 GMT
Following on from the points raised here. My 1996 Mayfair 1.3i also had this problem of flaring up when engaging 4th gear. The problem was worse under load, hard acceleration and when cold, but eventually became annoying as it happened all the time. I had the gearbox rebuilt at a specialist centre but it didn't really cure the problem.
Is it possible to completely resolve the flare up?
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Post by mra-minis on Jan 29, 2011 16:14:50 GMT
Yes, who ever did your rebuild didn't do the job correctly is it still under warranty ?
There are a few "secrets" that most so called specialists don't know about and if they did still wouldn't use them......
I get most of my automatic rebuilds from "automatic specialists" who have already rebuilt the unit only for it to come back as a failure......
We get referalls from most of the Mini specialists as well, this is mainly because it is a specialist transmission and not for the faint hearted.
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Post by tony105 on Jan 29, 2011 23:25:44 GMT
Hi Martin,
The re-build was undertaken some years ago so wouldn't be covered by warranty now. I will PM you.
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