Hi all,

The wife's Octavia is leaking gearbox oil from the seal behind the drive flange on the passenger side. I can see how to get to it (remove driveshaft at gearbox end, undo bolt in the centre of the drive flange and pull it out of the gearbox) but I am wondering about the seal.

Has anybody changed one? Is it a simple push fit seal or anything complicated and where is the best place to get one (main dealer I guess).

It's highly annoying as the whole of that side of the underneath of the car is slowly getting a film of stinky gearbox oil over it..

Also, I have tried to remove the gearbox drain/level plug but don't have anything that will fit the quite large internal hexagon in the plug.

Does anybody know what size that is and what tool is required to undo the plug.

Many thanks in advance

Jules

Edited 23 February, 201214 yr by julesandtash

Drain plug is a 17mm hex (Allen key)

It's pretty much that as long as you can get the Allen key out in the centre of the flange, usually a long Allen key on a socket on a 3/8" drive air gun is my tool of choice. Pop the seal out with a seal tool or a small pry bar and pop the new seal in, I have a set of seal drivers buy you could use a big socket but ideally it needs to go in square. It's knocks in onto a shoulder so can't go in to far, it will tap in up to the shoulder and stop.

Thanks for that - I need to lay my hands on a 17mm hex then. I have a number of 3/8 drive hex and torx socket bits that will fit the centre bolt in the flange.

Do you know the best place to get the seal and, if poss, a part number?

Many thanks

Jules

I did this last year and wrote a how-to guide, so here you are:

http://www.briskoda....__fromsearch__1

Obviously I did the drivers side seal, but there's little different.

Excellent - great guide, many thanks for that. I will order the parts and pick a day to sort it out. Access on the passenger side is nicer than that on the drivers side (which is right under the engine).