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Post by lrm333 on Aug 19, 2016 21:41:08 GMT
I have a 1985 auto mini city E 1000 and every gear works fine apart from 1st, I think the clutch is slipping because it sounds like it engages but the car doesn't move. I changed the oil recently but that hasn't made a difference. Any ideas? Cheers
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Post by richard1 on Aug 21, 2016 11:58:08 GMT
What oil did you use? Modern car oils are super slippery. You need MA2 motorcycle oil.
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Post by nznick on Aug 24, 2016 9:46:25 GMT
We are new to mini autos too, our mini (1000cc Mayfair) was OK when warm (test drive at the garage!) but had horrible changes when cold (first morning we owned it). 2 days later changed out the 'new' oil the garage had put in for Castrol Power1 4T 10W40, MA2 spec bike oil and that transformed it...... hope its just the wrong oil and nothing more serious. |
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Post by limby2000 on Aug 25, 2016 4:41:53 GMT
Yes, it can be amazing the difference having the correct oil in an auto mini, especially in an engine with a lot of miles under its belt. Well done in catching it early and hopefull your sorted for a while. Terry.
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Post by richard1 on Aug 25, 2016 13:45:44 GMT
Many people around the world fail to see the problems with thick oils and slippery oils in these transmissions. When cold, a 20W-50 really cannot displace itself from the discs, and without the friction modifier in the MA2, it fights the discs. Too bad the average driver or even "mechanic" can't take a good look at the discs.
Hopefully that is all it was.
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charn
Junior Member
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Post by charn on Sept 16, 2016 22:59:52 GMT
I have experienced the slipping just recently for the first time since owning the Auto Mini. It happened after I have changed engine oil to Penrite for classic mini 20W-50. Especially an uphill section, the car would remain in first gear forever. The problem seems to go away when the engine warmed up a little.
I have check the engine oil level and it is ok. Could this be just the oil was too thick when engine is cold or I may have some other more serious issue with the car? Thank you
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Post by 69hcode on Sept 17, 2016 1:47:48 GMT
20w50 is probably too thick for your trans. I had a lot of problems until I found out I supposed to run 10w40. Shifts great now all the time with 10w40. Mine takes while to go into any forward gear from neutral. Always stays in and shifts right once its in.
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Post by mra-minis on Sept 19, 2016 11:47:36 GMT
I can be contacted on martin@kmprecisionengineering.com
Check your low pressure valve, remove strip clean etc... check for free operation as they can wear and stay very slightly open.
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Post by richard1 on Sept 19, 2016 23:15:38 GMT
I have experienced the slipping just recently for the first time since owning the Auto Mini. It happened after I have changed engine oil to Penrite for classic mini 20W-50. Especially an uphill section, the car would remain in first gear forever. The problem seems to go away when the engine warmed up a little.
I have check the engine oil level and it is ok. Could this be just the oil was too thick when engine is cold or I may have some other more serious issue with the car? Thank you
Both too thick and not made for automatic transmissions. That product has extra additives to protect sliding tappets and cams against high pressure springs in some classic engines. The opposite of what you need in automatic clutches. |
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Post by 69hcode on Sept 20, 2016 1:39:20 GMT
Martin,
Will the low pressure valve make the car very slow on first takeoff. I have no power until maybe 2000 rpm's then it runs great. I can do the stall test and get about 1400 rpm's with a SPI converter on a 998.
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charn
Junior Member
Posts: 4
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Post by charn on Sept 20, 2016 12:29:00 GMT
I have experienced the slipping just recently for the first time since owning the Auto Mini. It happened after I have changed engine oil to Penrite for classic mini 20W-50. Especially an uphill section, the car would remain in first gear forever. The problem seems to go away when the engine warmed up a little.
I have check the engine oil level and it is ok. Could this be just the oil was too thick when engine is cold or I may have some other more serious issue with the car? Thank you
Both too thick and not made for automatic transmissions. That product has extra additives to protect sliding tappets and cams against high pressure springs in some classic engines. The opposite of what you need in automatic clutches. If that is the case, why would Penrite stated that it is specificly made for classic mini? Just curious. Only good for manual mini? Cheers |
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Post by 69hcode on Sept 20, 2016 13:01:23 GMT
^^^Marketing^^^
A lot of people never heard of an automatic mini.
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Post by mra-minis on Sept 20, 2016 13:02:11 GMT
I can be contacted on martin@kmprecisionengineering.com
Because they like most people don't even consider the automatic !
The question to ask is "if I use your oil who do I need to speak to about reimbursing the cost of my destroyed automatic Mini transmission"
I suspect you will find the small print removes all danger of them getting sued for loss due to incorrect oil !
I ask them for the test report concluded on a classic mini with an AP automatic unit..... the phone often goes dead at this point.
I'll stick to MA2.
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charn
Junior Member
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Post by charn on Sept 20, 2016 14:16:42 GMT
Old oil out. MA2 oil by Castrol in, drive very well, much better.
Slipping when cold issue disappeared, thank you for recommendation guys.
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Post by richard1 on Sept 21, 2016 11:23:22 GMT
Old oil out. MA2 oil by Castrol in, drive very well, much better. Slipping when cold issue disappeared, thank you for recommendation guys. Glad to hear it. I spend a lot of time trying to refute false claims and myths by people who are ignorant of the variations or even concepts of oils. Surprisingly, I even got Shell to thank me for some comments. |
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Post by mra-minis on Sept 21, 2016 14:34:36 GMT
Martin, Will the low pressure valve make the car very slow on first takeoff. I have no power until maybe 2000 rpm's then it runs great. I can do the stall test and get about 1400 rpm's with a SPI converter on a 998. The low pressure valve has nothing to do with you pulling off from rest accept that it maintains engine oil pressure at tick over.. and keeps the converter filled with oil. The SPi converter is a low stall converter to pull it you need more torque, ie a 1098 with engine modification/s or any of the 1275 50BHP + engines would be ideal. 998 and 848 need a higher stall speed converter. |
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Post by mra-minis on Sept 21, 2016 14:36:19 GMT
Old oil out. MA2 oil by Castrol in, drive very well, much better. Slipping when cold issue disappeared, thank you for recommendation guys. Glad to hear it. I spend a lot of time trying to refute false claims and myths by people who are ignorant of the variations or even concepts of oils. Surprisingly, I even got Shell to thank me for some comments. Richard were any of these comments aimed at Shell's competitors ?  |
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Post by richard1 on Sept 21, 2016 23:09:25 GMT
No, it had to do with very confusing language on their own products where they literally described some of their inferior products better than better products.
I often find absurd claims on products, and in this case it was within their own products.
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Post by 69hcode on Sept 22, 2016 2:33:27 GMT
I swapped out the low pressure valve this evening. Was a little more involved than I thought. I used the one of my SPI trans. Took it apart and cleaned it. It is nice and smooth even before cleaning. Had 2 springs. The original valve had one spring and definitely not smooth. Felt very gritty. I'm still going to take it apart and clean it up. I changed the oil as well since quite a bit came out when I took the valve off. I put in Lucas 10w40 semi-synthetic motorcycle oil that is MA2.
I'm running the SPI converter as I had one and thought the original was going bad. They both stall about the same. My car has been very slow off the line since I got it about a year ago. It also runs on the hot side. If I'm not careful it will get up to 220F. I'm running an aluminum radiator and a tropical 6 blade fan. It also has new water pump and hoses and heater core.
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Post by 69hcode on Sept 22, 2016 3:11:06 GMT
Also forgot to mention the SPI valve has 2 pressure test ports. Although I see no way to get to them with the engine in the car. Maybe the SPI had a different subframe?
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Post by mra-minis on Sept 22, 2016 11:45:39 GMT
I can be contacted on martin@kmprecisionengineering.com
1) you may have gear "tie up" this is when 2 or more gears try to engage at the same time, usually the whole driving experience is slugguish and the car feels like the brakes are on.
2) the 2 pressure ports you mention are simply drillings that allow for manufacture, metro's also have a thermostatic valve in one hole.
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Post by 69hcode on Sept 22, 2016 14:54:47 GMT
Would that be in the valve body? I noticed this morning it doesn't roll either when it does this. Any direction you could point me in. If I was in England I would just bring you the car. Most people here never knew there was an auto mini. Alot don't even know what kind of car it is.
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Post by mra-minis on Sept 22, 2016 15:07:46 GMT
Would that be in the valve body? I noticed this morning it doesn't roll either when it does this. Any direction you could point me in. If I was in England I would just bring you the car. Most people here never knew there was an auto mini. Alot don't even know what kind of car it is. Does it always do it, or just sometimes ? It could be valve body related or bands incorrectly adjusted, have you had the bands adjusted recently ? What car is it ? What year ? What engine ? |
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Post by 69hcode on Sept 22, 2016 16:53:17 GMT
It does it every time I put it in a forward gear. Sometimes I have to increase the rpms when it's warm. I have not adjusted the bands. Looked online to find how to do it with no luck.
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Post by 69hcode on Sept 22, 2016 16:54:52 GMT
Forgot to add. It's an 81 998 a+. Looks to be original. Has about 70,000 miles.
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Post by limby2000 on Sept 22, 2016 18:27:12 GMT
Tbh , 70,000 on a 81 transmission, you,ve done really well, when i stripped down my 89 mini 30 box, most of the (O) rings had hardened, and that only had 56,000 miles on it. Also 2 of the 3 bands were badly degraded.
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Post by mra-minis on Sept 22, 2016 18:36:08 GMT
It does it every time I put it in a forward gear. Sometimes I have to increase the rpms when it's warm. I have not adjusted the bands. Looked online to find how to do it with no luck. maybe this will help, also I have gaskets and seals for anyone that wants them... |
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Post by mra-minis on Sept 22, 2016 19:15:43 GMT
Tbh , 70,000 on a 81 transmission, you,ve done really well, when i stripped down my 89 mini 30 box, most of the (O) rings had hardened, and that only had 56,000 miles on it. Also 2 of the 3 bands were badly degraded. There is absolutely no reason that an AP unit (well AP 2 onwards) can't go on forever.... the main failures are due to poor oil quality and change points causing as Terry says the rubber parts to fail. Of course there will always be failures in service, but poor service is the main culprit. |
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Post by limby2000 on Sept 22, 2016 20:18:45 GMT
Poor oil/servicing is probably the main issue, i forgot to mention even though my car had fairly low miles, i am the 14th owner!.
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Post by 69hcode on Sept 22, 2016 21:56:56 GMT
I've only had my car a little over a year. The last guy only put a few hundred miles on it.
My car does roll easy when I first put it in gear. I must have had a tire in a hole when I thought it was binding up. I was thinking the forward clutch was taking a while to engage but my rpms drop as soon as I select a forward gear.
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