75 Diesel - Manual Gearbox Leak

Tingers · 20th June 2018, 07:17

Hi all

After a bit of effort investigating the loss of oil from my gearbox I have finally pinned it down to a worn out gasket. I tightened the bolts a bit to see if that had any effect but regrettably it didn't.

Before I spend the inevitable bucket load of money getting this fixed has anyone had any experience using a "Stop Leak" product that I have seen advertised on the net?

I'm not a cynic (!) but I don't want to fill my gearbox with gunk that a) doesn't work and b) messes the gearbox up.

Or it could be the miracle product I need ...

Thanks!

Daveluck · 20th June 2018, 12:28

Quote:

Originally Posted by Tingers

Hi all

After a bit of effort investigating the loss of oil from my gearbox I have finally pinned it down to a worn out gasket. I tightened the bolts a bit to see if that had any effect but regrettably it didn't.

Before I spend the inevitable bucket load of money getting this fixed has anyone had any experience using a "Stop Leak" product that I have seen advertised on the net?

I'm not a cynic (!) but I don't want to fill my gearbox with gunk that a) doesn't work and b) messes the gearbox up.

Or it could be the miracle product I need ...

Thanks!

What gasket do you think is leaking?

Don't put gunk in you box!

Tingers · 20th June 2018, 16:20

When under the car it looks like the large transmission gasket - the gasket closest to the engine - is leaking. It looks like it is a thin metal gasket from what I could make out but may be wrong there.

It's going to be the classic case of a couple of hundred £ to fit a £20 part - ah well.

Gunk is officially ruled out! I'd rather fork out to have the job done properly.

Thanks!

Greeners · 20th June 2018, 16:29

Assuming its a manual, its probably the clutch slave cylinder leaking

macafee2 · 20th June 2018, 16:43

I think if you look under the gearbox there is a machined hole. Goodness knows what it is for, may be you can wangle a finger I there see what oil is there.
I'm not sure that gasket is an oil gasket as there is no oil in the bell housing but an oil seal on the gearbox shaft that goes from clutch slave into gear box.

macafee2

Daveluck · 20th June 2018, 18:06

Quote:

Originally Posted by macafee2

I think if you look under the gearbox there is a machined hole. Goodness knows what it is for, may be you can wangle a finger I there see what oil is there.
I'm not sure that gasket is an oil gasket as there is no oil in the bell housing but an oil seal on the gearbox shaft that goes from clutch slave into gear box.

macafee2

Yes from bell house to engine there is a metal plate but I don't think k you can call it a casket, besides on that join there is nothing to seal as such.

Where about is it leaking?is it dripping from the hole that macafee has said? If it is then it could be fluid from the clutch system or it could be gearbox oil leaking from box into the bell housing because of a failed seal.

Post a photo or something!

Can you tell what colour the oil is?

Tingers · 21st June 2018, 22:52

It's definitely gear box oil as I lost about a litre of the stuff over the course of 6 days. The underside of the car has a fine coating unfortunately. At over £10 a litre this is a costly way to run the car!

I had the clutch slave cylinder replaced about 2 1/2 years ago so hopefully that is still sound.

The drip seems to appear at the bottom of the metal plate that Dave mentions but could be leaking from anywhere above it. If I get a chance I'll take some pics tomorrow and post here.

Thanks

Mike Noc · 22nd June 2018, 06:37

Chances are it is the gearbox input shaft seal. Cheap enough part, but the box has to come off to replace it.

Worth checking that the input shaft is running true with no excessive play whilst the box is off as either fault can accelerate wear on the seal.

.

macafee2 · 22nd June 2018, 18:23

just check the drive shaft oil seals to make sure it is not one of those leaking and oil is running down the bell housing.

How are your DIY skills, this job is not for the faint hearted but with a little but invaluable help, the getting off and refitting of the gearbox can be done DIY. I don't know enough about the oil seal to comment.

good luck

macafee2

Tingers · 22nd June 2018, 22:28

Thanks for all the advice and tips - I would love to have a go myself at fixing this problem but don't have access to a hydraulic ramp or pit - or time to be honest! I'm going to take the car to my mechanic next week to check out and fix the problem with credit card at the ready. I'll update this thread once I find out what the problem is in the hopes it may help anyone else with a similar issue.

Cheers!

20th June 2018, 07:17	#1
Tingers Regular poster Remapped Rover 75 Connoisseur CDTi SE Saloon Join Date: Oct 2011 Location: Eastbourne Posts: 31 Thanks: 3 Thanked 3 Times in 3 Posts	75 Diesel - Manual Gearbox Leak Hi all After a bit of effort investigating the loss of oil from my gearbox I have finally pinned it down to a worn out gasket. I tightened the bolts a bit to see if that had any effect but regrettably it didn't. Before I spend the inevitable bucket load of money getting this fixed has anyone had any experience using a "Stop Leak" product that I have seen advertised on the net? I'm not a cynic (!) but I don't want to fill my gearbox with gunk that a) doesn't work and b) messes the gearbox up. Or it could be the miracle product I need ... Thanks! __________________ Tingers She's the love of my life - the wife's not too bad either

20th June 2018, 16:20	#3
Tingers Regular poster Remapped Rover 75 Connoisseur CDTi SE Saloon Join Date: Oct 2011 Location: Eastbourne Posts: 31 Thanks: 3 Thanked 3 Times in 3 Posts	When under the car it looks like the large transmission gasket - the gasket closest to the engine - is leaking. It looks like it is a thin metal gasket from what I could make out but may be wrong there. It's going to be the classic case of a couple of hundred £ to fit a £20 part - ah well. Gunk is officially ruled out! I'd rather fork out to have the job done properly. Thanks! __________________ Tingers She's the love of my life - the wife's not too bad either

20th June 2018, 16:29	#4
Greeners Moderator MG-ZTT Join Date: Mar 2007 Location: Ware, Herts Posts: 19,798 Thanks: 161 Thanked 1,249 Times in 1,036 Posts	Assuming its a manual, its probably the clutch slave cylinder leaking __________________ *David* Impecunity is the mother of ingenuity Useful how to's for common problems Car Of The Month Jan 2014 [SatNav Power Down] [Coolant Level] [SatNav Repair] [Diesel Non Starting] [Paint Codes] [Rear Light Seals] [Reversing Light Switch] [Bleeding Brakes][Sunroof Drain] [Early ZT's][Instrument Pack Diagnostics][ATC Diagnostics]

21st June 2018, 22:52	#7
Tingers Regular poster Remapped Rover 75 Connoisseur CDTi SE Saloon Join Date: Oct 2011 Location: Eastbourne Posts: 31 Thanks: 3 Thanked 3 Times in 3 Posts	It's definitely gear box oil as I lost about a litre of the stuff over the course of 6 days. The underside of the car has a fine coating unfortunately. At over £10 a litre this is a costly way to run the car! I had the clutch slave cylinder replaced about 2 1/2 years ago so hopefully that is still sound. The drip seems to appear at the bottom of the metal plate that Dave mentions but could be leaking from anywhere above it. If I get a chance I'll take some pics tomorrow and post here. Thanks __________________ Tingers She's the love of my life - the wife's not too bad either

22nd June 2018, 06:37	#8
Mike Noc This is my second home Rover 75 CDT Manual Connoisseur SE, Rover 75 CDT Automatic Connoisseur SE & a Freelander Td4. Join Date: Jul 2009 Location: Hampshire Posts: 11,580 Thanks: 3,470 Thanked 3,119 Times in 2,247 Posts	Chances are it is the gearbox input shaft seal. Cheap enough part, but the box has to come off to replace it. Worth checking that the input shaft is running true with no excessive play whilst the box is off as either fault can accelerate wear on the seal. . Last edited by Mike Noc; 22nd June 2018 at 06:46..

20th June 2018, 16:43	#5
macafee2 This is my second home Rover 75 Saloon & Tourer Join Date: Sep 2012 Location: Lincoln Posts: 14,991 Thanks: 1,630 Thanked 3,032 Times in 2,181 Posts	I think if you look under the gearbox there is a machined hole. Goodness knows what it is for, may be you can wangle a finger I there see what oil is there. I'm not sure that gasket is an oil gasket as there is no oil in the bell housing but an oil seal on the gearbox shaft that goes from clutch slave into gear box. macafee2

22nd June 2018, 18:23	#9
macafee2 This is my second home Rover 75 Saloon & Tourer Join Date: Sep 2012 Location: Lincoln Posts: 14,991 Thanks: 1,630 Thanked 3,032 Times in 2,181 Posts	just check the drive shaft oil seals to make sure it is not one of those leaking and oil is running down the bell housing. How are your DIY skills, this job is not for the faint hearted but with a little but invaluable help, the getting off and refitting of the gearbox can be done DIY. I don't know enough about the oil seal to comment. good luck macafee2

22nd June 2018, 22:28	#10
Tingers Regular poster Remapped Rover 75 Connoisseur CDTi SE Saloon Join Date: Oct 2011 Location: Eastbourne Posts: 31 Thanks: 3 Thanked 3 Times in 3 Posts	Thanks for all the advice and tips - I would love to have a go myself at fixing this problem but don't have access to a hydraulic ramp or pit - or time to be honest! I'm going to take the car to my mechanic next week to check out and fix the problem with credit card at the ready. I'll update this thread once I find out what the problem is in the hopes it may help anyone else with a similar issue. Cheers! __________________ Tingers She's the love of my life - the wife's not too bad either