Thread: Auto transmission lines

Sadly there are plenty of posts on fixing those pipes,,
use the google search box, bottom left of page,
type
D2 gearbox lines

you will have to read all the results to see what fixes were done,,
great idea to fix it before!!



to the rest of the D2 owners--
wouldnt the judicious use of a flaring tool fix it?

I sleep better at night knowing I've replaced with good ole clamped hose on one side of the run. Of course it's oil/high temp and getting a snug size fit is essential - as are quality hose clamps and some pipe bends to avoid kinked hose.

The culprit for failure is not the quick conect but the swage where the flex hose joins the steel pipe.
The ZF automatic in the D2 run a higher pressure than the old C4 transmissions of days gone so while a hose and clamp will get you by long term it's a weak point.
This is why the traditional add on oil coolers aren't fitted.
My advice is remove the pipes, take them to a hydraulic shop(Pertec/Enzed/HIS Hose) and have the swages redone.
This was my repair and once done it never leaked again.

I have been thinking about this myself using reusable fittings so they can be repaired anywhere that has a vice along as you have a length of fresh hose and a spare nipple onboard.
Adam's fix looks the goods too easily repaired, there are plenty of quality hose clamps out there you just have to find them, i saw some to suit heater hose they were like turbo hose clamps at a truck parts store.
A few people have said there is high pressure in these lines, i haven't looked for the PSI anywhere, the return line must go back into hydraulic circuit and not direct to the sump if this is the case.

I'm not convinced about the pressure (though happy to be shown in black and white--)
If the lines were subject to "high pressure" why would the connections, that blow off so regularly, have been used?
Even LR couldnt have been that bad,,
am pretty sure the germans wouldnt have been...
What Engineer would sign off on that design??

I wonder if Mr Hunter could fit a pressure gauge into that T piece

This was my solution Trans Cooler Fixed


No issues so far and I have options should I need to fit an external cooler.

Originally Posted by Pedro_The_Swift

I'm not convinced about the pressure (though happy to be shown in black and white--)
If the lines were subject to "high pressure" why would the connections, that blow off so regularly, have been used?
Even LR couldnt have been that bad,,
am pretty sure the germans wouldnt have been...
What Engineer would sign off on that design??

I wonder if Mr Hunter could fit a pressure gauge into that T piece

I'll give it a go when I do my next fluid change, which will be in the next couple of months before we head off on the lap. I thought there would be pressure in the line, but I tend not to think so much with the way mine leaked, ie the direct spray was contained within say 300mm of the leak, except on the downwind side which was driven by air. ATF is like liquid magic, as soon as it gets out it looks like you have lost more than you have. In the end the swage was just sitting in place, took zero force to remove, any decent pressure would have blown it right off surely. .

Originally Posted by 999

This was my solution Trans Cooler Fixed


No issues so far and I have options should I need to fit an external cooler.

Thanks 999

Please ignore my other question on your original post