help needed

[FRANKYDOOM]

Hi

i wanna replace my transmission oil and lost at the first hurdle. Cant open the blimmin nut - using a 17 mm hex - also the drainplug is fu***ed, I have no welding gear, also tried it after a drive...... need help - If i cant replace it at least i wanna check the level is ok. Any other way ...

Thanks in advance

Frankydoom/82/924/UK

[diannone]

try a short 17 mm bolt with a couple of jam nuts and a ratchet/socket. put it in the hole and put alot of side pressure on the ratchet, maybe someone on the side pushing on it so it doesnt slip. thats what i had to do.

[TheStig]

is there a way to use penetrant in order to get that bolt outta there? I wanna know this too so I can change the oil in my tranny and differential too.



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Porsche. Es gibt keinen Ersatz.

[IceShark]

Don't know how you tried this but if it was hand on a normal 17mm L type allen wrench there is no way you will be able to get it out.

You say the drain plug is shagged? How so, i.e. are the sides rounded?

For the top filler, which should be pulled before the drain so you don't wind up with empty case and no way to fill, penetrating oil, heat from a torch and a breaker bar on the 17mm allen wrench is the way to start.

A small propane torch should be good enough in most cases and they are very cheap even in the UK. Just get a general tip and bottle of propane - $10 US.

If you haven't buggered up the top plug, clean it out good so the allen wrench fits in all the way. Spray in penetrating oil and let it sit for a couple hours while you have a few beers. Go back and spray some more when you think about it. Next morning, get a 2 foot pipe to slip over the allen wrench as a breaker bar. Make sure and hold the allen wrench tip in square to the plug and try to remove with the breaker lever on. If you have a friend to help have him be the muscle on the breaker bar while you hold the driver in square. Don't overdo this stage if it doesn't start to come out.

If you fail, apply heat with torch. Get a scrap of tin to put above the plug so flame wash doesn't start something like your undercoating on fire. Squirt with oil and try breaker bar again. Should come out if you haven't buggered up the side faces of plug.

These are tapered pipe threads so they are not going to release in a snap like straight threads. When you put the plug back in (replace it if you have damaged the sides trying to back it out) use teflon plumber's tape on the threads so this never happens again. Teflon makes a better seal and also prevents galling and corrosion of the threads together. If the transmission engineers were going to use a plumbing thread they should have taken centuries of plumber's experience and spec'ed what plumbers know.

Don't use a bolt and couple nuts like another poster suggested. The tolerances are too sloppy (round your plug hole) and the steel is unlikely to be tool hard, which can make a big difference. If you need to go this route because you are incapable of maintaining squarness with an allen wrench and pipe, buy a 17mm allen driver if you can find one ($$$), or just lop off a 1" chunk of your allen wrench and stick it in a 17mm socket and use for driver. You are still going to need a 24 to 30" lever on the end of that.

Good Luck.

[eligunn]

remove all the bolts in the cv joint and hang it out of the way, remove the yoke that sticks into the tranny and you have access for filling it with oil

[Booster]

You don't have to remove the CV to add oil!

[FRANKYDOOM]

Thanks - all

dont laugh but what/were is the yoke ???

Thanks

[CrazySOB]

The yoke-- cv joint! You don't have to remove any of that to fill it.

[EGSMachine]

an old trick i learned working on navy ships for removing stuck screws, is to lightly tap the tool while twisting. don't use all your force to twist either, but about 50-75% of your power should be good, and light solid taps.
egs

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84-9445m
Porsche, "Overtly Masculine Feel".

93-325is 5m;
driven daily.

[diannone]

mine was rounded and the allen made it worse when it slipped so i was able to back out the plug with the nut and bolt thing and a breaker bar. take it for what its worth , it worked for me. and when tightening it, dont impress your girlfriend with how tight you can make it.