17 replies to this topic

[daisy76]

Mini Mayfair Automatic 1275
M Reg

Hi, I have just bought this car and am starting to fix a couple of faults. The first thing is that the automatic choke seem to be staying on for a long time and I think this is causing the car to creep forwards when it's put into drive or reverse. I have never driven an automatic before but I am told that it shouldn't be creeping forward if I havn't got my foot on the brake.

Does anybody have any ideas as how to fix this.


Thanks

[truezie.]

hi..

automatics do creep forwards

[daisy76]

So is this quite common because we were worried that it may be an automatic gearbox problem. It kind of thuds when you put it into reverse or forward. Could this be the bottom engine stay? We have fixed the top one as that was really bad.

[me madjoe 90]

So is this quite common because we were worried that it may be an automatic gearbox problem. It kind of thuds when you put it into reverse or forward. Could this be the bottom engine stay? We have fixed the top one as that was really bad.

nope this is also an auto thing its an old auto gearbox they are all like this, mine dose it they creap forward/backward also very clunky its nothing to be worryed about. i like it because u always know if its in gear / drive what u have to rmber that gearbox hasnt changed in desine much since it was in austin A30's and syimiler (its quality) and despite what people say that there tempramental and break easily if its well looked after and oil changes regularly (as the sump and gearbox are the same thing) it will last for a very long time.................

apologise for bad spelling grammer and punctuation im not every good wiith english

and im not sure about the choke being on to long as mines a mini cityE 1988 with a manualchoke so not sure on that one but it dosent have anything to do with the creaping forward

Edited by me madjoe 90, 04 July 2009 - 07:58 PM.

[daisy76]

Thanks for that, I was really worried and had lots of people telling me that I would need a new engine and gearbox. (Only people who don't drive mini's I might add). I feel better about it now.

Thanks again.

[me madjoe 90]

Thanks for that, I was really worried and had lots of people telling me that I would need a new engine and gearbox. (Only people who don't drive mini's I might add). I feel better about it now.

Thanks again.

its all good ahh you need to tell em you've never lived till you have driven a mini

just add if u are realy worried and you have only just got it, if its not had a service in a while give it a good one just to be sure and put some good fresh oil in it. oil changes are key with autos and if your running an SU carb unsrew the black cap on the top and pour a bit of engine oil in there and put the cap back as it was, as su carbs need lubrication to work properly.

happy driveing

[Ethel]

As said, regular oil changes help. If it's in gear it's in drive, since there's no clutch. The idle speed is important as it's the only way the gearbox knows that your foot is off the go pedal. If the choke is out it increases the idle speed so the gearbox will think it's time to start moving. Slip it in to neutral whenever you're stationary for more than a few seconds.

Joe, the oil in the carb dashpot is for damping, like a suspension shock absorber. If you over fill it, the oil will just be burnt in the engine. The thing with autos is to have the idle and fast idle screws set properly.

[me madjoe 90]

If it's in gear it's in drive, since there's no clutch.

i know sorry i said it wrong i was refering to the fact you can also select gears 1,2,3 manuly aswell (asin force the box to stay in only one gear)

[daisy76]

Thanks for all the info. I'm going to try to get the choke sorted then it should be ok.

[Nelson92]

hi have an auto 1275. when you at traffic lights or something, and have put the car in park, it's best to keep your foot on the brake whilst you select gear, and when it clunks into drive, you will feel the creep letting you know you can pull off. if you start modding the engine for more power you'll need this so you don't slam into the car infront. also the choke should be on longer on the auto as the idle quite low when in drive and stationary. try putting it in neutral and seeing if you have the same problem. on the manual choke i end up leaving it out just a little bit around town to help keep the revs up in traffic.
i do at least 2 oil changes with 20/50 oil and change the filter element aswell. seems to reduce the clunking quite nicely after a change.
enjoy the auto.

[me madjoe 90]

hi have an auto 1275. when you at traffic lights or something, and have put the car in park, it's best to keep your foot on the brake whilst you select gear, and when it clunks into drive, you will feel the creep letting you know you can pull off. if you start modding the engine for more power you'll need this so you don't slam into the car infront. also the choke should be on longer on the auto as the idle quite low when in drive and stationary. try putting it in neutral and seeing if you have the same problem. on the manual choke i end up leaving it out just a little bit around town to help keep the revs up in traffic.
i do at least 2 oil changes with 20/50 oil and change the filter element aswell. seems to reduce the clunking quite nicely after a change.
enjoy the auto.

sorry for hyjaking this thread abit but is 20/50 what autos should have because i thught all minis wer origonal with 10/40 oil ? just wondering if i put wrong stuff in mine if i have my minis geting another oil change XD (im spoiling it )

Edited by me madjoe 90, 04 July 2009 - 08:40 PM.

[bmcecosse]

Just to point out - Mini's don't have 'automatic choke' - the choke is always operated by human hand - by pulling the knob! When the choke is out - the idle speed will always be higher, and so yes the auto box will be liable to clunk etc. Push the knob in as soon after starting as possible - and carefully set the normal hot idling as low as possible without the engine stalling on you.

[Nelson92]

hi: about the 20/50. i've tried a few oils in mine in the last 18 months and this works best with the auto. i think its pretty popular as you can get duckhams or halfords classic pretty cheaply to (£15). don't worry about using 10/40, i was just letting daisy76 know what works best for me. i tend to ignore the rover handbook and go with what works best for the car. so don't rush out and change your oil on my say though please!

bmcecosse, i did wonder that aswell. mines on a jplate with a manual choke. as for my car you can't put the choke in fully if driving slowly around town as the revs seem to drop to low when you're off the gas. the idle speed and carb is set up well but it still likes the first cm of choke which the rover manual says just keeps the rpm a bit up. unless you go into park at lights in which case it has to go fully in. does that make sense? i think drive seems to drag the revs down a bit and i counter this by using my rev section of the choke, not the mixture section.

[bmcecosse]

Yes - if the 'choke' (completely wrong description for an SU carb - because it doesn't 'choke'!!) is set up correctly, then the first small movement will indeed just lift the idle speed without enrichening the mixture.

[Nelson92]

cheers

ps. daisy76 do you have rover manual (owners handbook) for your car. it's actualy pretty usefull and explains how to drive it properly. i can scan it for you and email it to you if that would help.