Auto Gearbox fluid drain

[missfixit70]

Two kinds of autobox on the Bongo - from memory the newer one has less fluid. I think keefysher posted about it recently.

From what I remember, he did his new shape using 4 litres & 100 miles later found it wasn't enough, might be wrong though

[missfixit70]

http://www.igmaynard.co.uk/bongo/forum/ ... e0#p202509

[Trouble at t'Mill]

Big daddy - ha ha!

Dandy, that's a good point - there are two different types of filter housing too; I guess that's the different types of 'box?

Mine was the 4-bolt type filter - I think it's the earlier type. So my findings will relate to that.

[mikeonb4c]

Good tips all round. I'm put off from DIYing it though as I worry about access problems, dust / dirt being blown in to exposed components (I'd be working outdoors, on my drive), getting a good gasket seal on refitting and (now) capacity issues. It should be a quick job for Wheelquick (and they'll need the engine cover off anyway as I'm going to have the n/s disel pump O ring done at the same time). I love the achievement of DIYing things, but will probably pass on this one.

[missfixit70]

I've just been down to Dunnings autos to have a chat with the guys, mainly because I was wondering about the oil in the cooler & pipework. They reckon that if you drop the pan & filter, up to 6 litres to refill, BUT there will still be a load in the torque converter, oil cooler & pipework maybe as much as another 4 litres. When they do a gearbox rebuild they reckon it's about 18 pints (just over 10 litres) to refill from clean.
If you want to drain a bit more, removing the oil return form the oil cooler, & turning it over to pump it through is possible, but could result in it running dry & causing serious upsets if you turn it over for too long
They didn't seem to think, getting all the oil out was too much of an issue to worry about.
I was wondering whether which end you jacked the bongo up would have an effect on how much comes out?, ie if it's sloping backwards, a bit more may dribble back down the pipework from the cooler?
It's all food for thought
Just bought 10 litres of DIII ATF for £29, hopefully it'll be enough to replace the steering fluid when I swap the refurbed rack as well as the gearbox.

[missfixit70]

Further point to consider, is the pipework/cooler even doing it's job? I remember seeing a post from someone about the pipes being full of "mud" I think the description was. Maybe this could also be part of the reason for differing amounts needed to refill?
Can you tell I'm bored

[dandywarhol]

If you're bored and really keen you could get a second hand power steering pump rigged up and connect it to the gearbox to cooler pipes - that'll soon flush it out. When overhauling auto boxes I also used a remote filter housing connected onto the gearbox via the cooler pipe ends and idled the engine in "P" for 15 mins - that flushed out the torque convertor pretty well.

[missfixit70]

I was thinking one of those little pumps you power off a drill, using a jug or bowl as a sump. What do you think?
I like the idea of the filter to flush the torque converter, any specifics on what you used?

[dandywarhol]

Need to be a pretty high power pump to really flush it out - the PAS pump certainly is.

It was some kind of remote oil filter setup from a BMC engine - perhaps a Mini - one with a paper cartridge element

[missfixit70]

Sounds like I've got a scrappie trip coming up then

[teenmal]

If you're bored and really keen you could get a second hand power steering pump rigged up and connect it to the gearbox to cooler pipes - that'll soon flush it out. When overhauling auto boxes I also used a remote filter housing connected onto the gearbox via the cooler pipe ends and idled the engine in "P" for 15 mins - that flushed out the torque convertor pretty well.

What about an Air Line

[dandywarhol]

Better than nothing, although it might tend to force the crap into the crannies in the cooler

[teenmal]

Better than nothing, although it might tend to force the crap into the crannies in the cooler

Or out of the crannies,

[teenmal]

Better than nothing, although it might tend to force the crap into the crannies in the cooler

Or out of the crannies,

Or Crankies

[missfixit70]

Don't go sticking the air hose up the Crankies