Automatic transmission problem

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richn
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Joined: Sun Jan 08, 2012 9:42 pm

Automatic transmission problem

Post by richn » Tue Dec 17, 2019 2:31 pm

79 528i auto transmission problem

Out for a drive yesterday, accelerated from stop sign, all gears are gone. Still has park. Added fluid but no change.

Any suggestions.

RICH N :cry:

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Lock
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Location: Washington state
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Re: Automatic transmission problem

Post by Lock » Thu Dec 19, 2019 11:21 pm

What color is the fluid, was it changed recently before this? How was the transmission before that, weak shifts or okay? Is it making any noises now (or before it stopped)?

Mine had a flaring 1-2nd shift, dirty old fluid had clogged up the transmission valve body and there was a torn gasket internally so I dropped the pan, dropped the valve body and cleaned the whole thing in the kitchen sink, there's a post somewhere here about that. The 3HP22 transmissions are fairly simple as far as transmissions go, when I was troubleshooting mine I referred to AussieFrogs a lot, they are all about that transmission in their Peugeots. Just search 3HP22 and you'll come up with a lot of results. This page has a link to the factory service manual which I found really useful.

http://www.aussiefrogs.com/forum/techni ... anual.html

It's hard to guess what's wrong without seeing it, but sounds like it has no fluid pressure internally if nothing is happening, either something totally blocked (due to dirty fluid), blown gasket, or something just broke. I know that's not too helpful but either someone here or on AussieFrogs might know more. I eventually replaced mine with a 5-speed after I lost 2nd gear entirely.

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1979 528i 5-speed conversion G260/6, Motronic 1.3 179
1980 Honda CX-500

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528i-1981
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Re: Automatic transmission problem

Post by 528i-1981 » Sat Dec 21, 2019 7:46 pm

I don't have a dog in this fight, as my 81 E12 is a 5-speed, but I like your style Lock. Kitchen sinks are made for AT repair.
(oo=00=oo) Eric
1981 528i Manual

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Lock
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Re: Automatic transmission problem

Post by Lock » Tue Dec 24, 2019 1:42 am

528i-1981 wrote:
Sat Dec 21, 2019 7:46 pm
I don't have a dog in this fight, as my 81 E12 is a 5-speed, but I like your style Lock. Kitchen sinks are made for AT repair.
Had the house to myself that entire weekend, and spread transmission bits all over the kitchen as I cleaned them. I highly recommend it if you can get away with it!
1979 528i 5-speed conversion G260/6, Motronic 1.3 179
1980 Honda CX-500

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528i-1981
Posts: 244
Joined: Wed Feb 07, 2018 5:50 am
Location: Boston North Shore, MA

Re: Automatic transmission problem

Post by 528i-1981 » Wed Dec 25, 2019 7:09 pm

Rich - not sure where you are, but a Getrag 265/6 5 speed just popped up on Vancouver CL:

https://vancouver.craigslist.org/pml/pt ... 60603.html

I assume the asking price is CAD.
(oo=00=oo) Eric
1981 528i Manual

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