MautoK
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 posted on 8/4/09 at 02:23 PM |
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Auto box grief! - fixed!
As you may have seen elsewhere, I recently holed the sump pan of my auto box.
Prior to this (only the first ten miles that the car has been on the road) the box behaved reasonably, although the ATF was very low. It got up to 70
mph and changed gear at sensible speeds.
I've fixed the damage to the pan and refitted it, using a new gasket.
I checked the ATF level (properly, this time - idle + cycle the selector three times + wait a minute, then dip) and there's a lot more oil in
the box than previously. When I go through 'R' there's a much more pronounced jolt than before, implying that the extra oil is doing
its job.
BUT, on the road it won't change out of first gear
Added to which the rev counter has stopped working 
Any auto experts out there who can offer suggestions as to what might be amiss with the box (A4LD)
Many thanks in advance...
John.
[Edited on 8/4/09 by MautoK]
[Edited on 16/4/09 by MautoK]
[Edited on 16/4/09 by MautoK]
[Edited on 17/4/09 by MautoK]
He's whittling on a piece of wood. I got a feeling that when he stops whittling, something's gonna happen. (OUATITW/Cheyenne)
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Mr Whippy
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| posted on 8/4/09 at 02:42 PM |
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wonder if you could order a copy of this? - linky
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stevec
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| posted on 8/4/09 at 02:46 PM |
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One cause of no shift from 1st on a A4LD is a stuck govenor, it lives on the output shaft inside the tail housing. Is it your speedo that has stopped
working or the revcounter?
Steve.
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sickbag
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| posted on 8/4/09 at 02:47 PM |
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Of no help whatsoever but, I used to have a Mazda 636 that wouldn't shift between the gears automatically - I had to shift manually!
Defeated the object of an auto-box really.
That was the first, and last, car I ever drove that had 'girly-gears'.
Sorry.
Finally back on the job!
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MautoK
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| posted on 8/4/09 at 02:52 PM |
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@Mr Whippy - thanks for the link. Looks like a useful book.
@stevec - It's the rev counter that's stopped working (nothing to do with the autobox! )
He's whittling on a piece of wood. I got a feeling that when he stops whittling, something's gonna happen. (OUATITW/Cheyenne)
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stevec
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| posted on 8/4/09 at 03:23 PM |
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If it is the govenor they usually stick because of a bit of *hit. Will respond to a clean. Thats if you can get at the tail housing. Double check your
work first and make sure the selector is set correctly.
Steve,
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mark chandler
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| posted on 8/4/09 at 06:30 PM |
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Kick down jammed open maybe?
Is this an old ford 3 speed box (c3), if so underfill and gears go slushy, overfill and it will bang into gear and hold the the gears for longer,
maybe just overfilled.
Regards Mark
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MautoK
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| posted on 8/4/09 at 07:01 PM |
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Hi Mark,
It's the 4-speed (A4LD) which I believe is a development of the C3 3-speed.
What you say does tally with what I'm getting.
There's a good deal more ATF in it than previously - originally the level was between max and min with the engine off.
Since replacing the pan I've put in about 5.5 L of ATF so there's probably about 2L more than there was before - it's just at
'min' when I dip it after following the sequence of start engine, cycle selector three times, wait one minute, dip.
As you move the lever into reverse (either way, from P or D) there's a really strong backwards jolt - as you say, it bangs into gear. A similar
forward lurch when I go from R to D.
Prior to holing the pan I suppose it was a bit 'slushy', rather vague changes, but at the right sort of speeds.
The kickdown isn't connected (the wire from the solenoid was broken long ago). I will check, but I think it defaults to the 'normal'
position; good point though!
Thanks for your very constructive comments, Mark.
John.
He's whittling on a piece of wood. I got a feeling that when he stops whittling, something's gonna happen. (OUATITW/Cheyenne)
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MautoK
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| posted on 9/4/09 at 12:59 PM |
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No progress - it's raining and the garage is cold. I'd rather sit by the logburner and warm my knees with the laptop!
So I've ordered one of those Pela 6000 suction jobbies to take some of the oil out (to see whether the situation improves by reverting to the
previous too-low level).
And I'm on the look out for another complete auto box - anyone got one?
Mine is of unknown provenance, but the donor had done over 80K so it's quite probable that the box is close to death anyway. If I remember
correctly, the donor had a towbar so the box may have been through hard times.
He's whittling on a piece of wood. I got a feeling that when he stops whittling, something's gonna happen. (OUATITW/Cheyenne)
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MautoK
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| posted on 16/4/09 at 09:53 PM |
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One week on, and there is some progress.
Thanks to Nick who sold me the unwanted box from his donor.
The Pela oil extractor hasn't arrived yet so I decided to press on anyway - with loads of drip trays and absorbent matting..
Disconnected everything yesterday, then today hauled out the engine+box, swapped the box, put engine+box back in.
Had dinner and decided to do another half hour (OK two hours) reconnecting pipework, wiring, etc
Tomorrow, refit tunnel panels and nosecone, fill box with ATF and try it...
Currently enjoying a nice glass of Merlot...
He's whittling on a piece of wood. I got a feeling that when he stops whittling, something's gonna happen. (OUATITW/Cheyenne)
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MautoK
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| posted on 17/4/09 at 01:40 PM |
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Sorted!
It still overheats but at least the 'new' gearbox works properly!
John.
He's whittling on a piece of wood. I got a feeling that when he stops whittling, something's gonna happen. (OUATITW/Cheyenne)
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MautoK
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| posted on 17/4/09 at 04:08 PM |
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..and the rev counter is working again!!!!
He's whittling on a piece of wood. I got a feeling that when he stops whittling, something's gonna happen. (OUATITW/Cheyenne)
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Ninehigh
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| posted on 18/4/09 at 09:14 PM |
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Is the overheating going to cause a problem? I don't know how hot gearboxes get, I persume it gets about as hot as the engine, especially fwd
ones where it's just under it
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MautoK
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| posted on 19/4/09 at 08:20 PM |
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Oops! I wasn't very clear there - the engine overheats, not the gearbox!
He's whittling on a piece of wood. I got a feeling that when he stops whittling, something's gonna happen. (OUATITW/Cheyenne)
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