Hello from france

[laurent]

Hi,

I'm laurent from france.

I've just finished a rebuild : a 1971 mini 1000 automatic with 50000 km.

The  mini went well for 100km, then when hot, it started to make noise and ramble at take off, i've changed the oil,

Same issue, when hot, i made the following test : brake, 1st gear and accelerate, the engine runs like it has no gear engaged.

And then... No transmission, i can go forward at very slow, if i accelerate i have no more traction.

Reverse is working normally.

Have you got any ideas? In france the only answer i got is convert to manual...   

Thank you very much!

[jockduck]

Hi and welcome, with reverse working normally it sounds like a problem with the forward clutch, I'm afraid you need to do the pressure tests, if you did the rebuild you must have a good manual the test method is in there. look through the pages of this site for more information. Please don't go to manual, once sorted the auto is a great car.
Jock

[laurent]

Thank you Jock, I suspect the forward clutch too.
I drove auto for 50 km before the issue and i fully agree with you, auto is great, i'ld like to save it!
The gearbox is the only thing i didn't serviced (lack of experience and support), i didn't wanted to break something that worked... I guess i'll finally have to skill up in this domain;


Laurent

[richard1]

You might fix it with a cleaner/conditioner/seal swell agent like AutoRx, but that requires it to be able to run a bit. A good first step would be to test the pressure, as mentioned above, connecting a pressure gauge at the filter adapter (pulling the little plug there). As I remember, you need about 125 psi in forward gears and 175 in reverse. If you don't have them, you have a pressure problem, and I'd be looking at replacing all the o-rings (converter, valve block, cover, etc. Could also have leaks at center of the converter between the plates, just don't take out all 6 bolts at the same time (I loosened mine, cleaned and blow-dried the spacers, and forced some locktite in there (type for bearings and seals, not threads)

The converter is a real pain to get off. I've don it 4 times, broken three pullers. The forward clutch compartment is another challenge to assemble, and should not be attempted with the engine on top, as the top is the only way to actually align and hold the copper tube. There is a special tool to help assemble this, and I'm hoping it will eliminate the need for 2 sets of hands in that little space. As soon as my wife is well enough to travel, I'll be reassembling mine for the 5th or 6th time, hopefully right this time.

You can see some of the things I ran into in this link: www.widman.biz/cars/






Tarija and Santa Cruz, Bolivia