Please visit the Club's website https://www.dloc.org.uk/ to join. Visit https://www.dloc.org.uk/adhoc to DONATE towards the cost of the forum.
Please don't post someone's email address to avoid it being harvested by spambots and it's against GDPR regulations.
Always look at "ACTIVE TOPICS" to see all posts in date & time order as they are sometimes moved; or look at "Your Posts".
Please add Reg. nrs. when posting a photo or anything about a car as this will help searches. Don't add punctuation next to nr. as this negates search.
CHANGED YOUR EMAIL ADDRESS since registering?, click your username and check your address in User Control Panel, Profile, Account Settings.
If you want help to register, use "contact us" at page bottom for help.

V8-250 saloon: BW35 - Manual Shaft Oil Seal

Post Reply
classiclife
Classic Wise Man
Classic Wise Man
Posts: 1601
Joined: Wed Sep 05, 2018 9:55 am
Location: Ridgewood - East Sussex
Contact:

V8-250 saloon: BW35 - Manual Shaft Oil Seal

Post by classiclife »

Hello,

I'm looking for some advice on the following issue, please.

ATF leaks very slowly from the manual shaft oil seal (part number 9769) item 3 on the attached diagram of the BW Type35 Autobox assembly.

Looking at the position of the manual shaft and the lever assembly, in conjunction with the space available with the Autobox remaining in situ, is it possible to remove that oil seal without removing the gearbox ?? The area is restricted with the exhaust heat deflector which will require removing, but in general the area is tight.

Logic says no, but logic does not always give the correct answer !!

The leak is not dreadful, but it is there and ideally I'd like to eradicate it.

If it is a g/box out job - then a drip tray will save the day !!

Any help on the above will be gratefully appreciated.

Thank you in advance.

Regards.

Richard.
Attachments
V8-250 saloon BW T35 Auto Box - Item 3 Enhanced.jpg
1968 Daimler V8-250 Saloon
DLOC East Sussex Branch Secretary
DLOC 2.5L V8 & V8-250 Registrar - https://www.dloc.org.uk/v8-250
DLOC 2024 International Rally - https://www.dloc.org.uk/rally-2024

Clive
Posts: 19
Joined: Sat May 12, 2018 2:09 am
Location: Phoenix, USA

Re: V8-250 saloon: BW35 - Manual Shaft Oil Seal

Post by Clive »

Hi Richard,

I too have wondered. The service manual instructions for removing the box with the engine in place tells you to remove the engine stabiliser allowing the box to tilt down. See Fig 31 in manual. This may give you access to the seals, but it seems a comprehensive job with no guarantee.

Someone on the old forum used rubber washers crushed under locknuts to try to create a seal outside of the leaking seals.

Clive.

johnwager
Posts: 74
Joined: Thu Feb 11, 2016 3:26 pm
Location: Thundersley, Essex

Re: V8-250 saloon: BW35 - Manual Shaft Oil Seal

Post by johnwager »

Richard
I have changed this seal on my car,with the gearbox in situ fairly easily.
Disconnect the selector cable then undo the retaining nut and remove the selector lever, dig out the old seal with a small screwdriver, taking care not to damage the shaft or housing. Once you have cleaned the area, smear a little grease on the lip of the seal then slide it over the shaft. It can then be pushed into the housing using the nut of the shaft over a small socket or similar (can't remember what I used)
I did this laying on my back under the car.
Hope this helps
John

classiclife
Classic Wise Man
Classic Wise Man
Posts: 1601
Joined: Wed Sep 05, 2018 9:55 am
Location: Ridgewood - East Sussex
Contact:

Re: V8-250 saloon: BW35 - Manual Shaft Oil Seal

Post by classiclife »

Hello Clive and John,

Thank you for your responses - this has certainly given me a better understanding that the job can be performed with the unit in situ.

Best wishes.

Richard.
1968 Daimler V8-250 Saloon
DLOC East Sussex Branch Secretary
DLOC 2.5L V8 & V8-250 Registrar - https://www.dloc.org.uk/v8-250
DLOC 2024 International Rally - https://www.dloc.org.uk/rally-2024

classiclife
Classic Wise Man
Classic Wise Man
Posts: 1601
Joined: Wed Sep 05, 2018 9:55 am
Location: Ridgewood - East Sussex
Contact:

Re: V8-250 saloon: BW35 - Manual Shaft Oil Seal

Post by classiclife »

Hello John,

Re-reading your post, I presume that there is no necessity to disturb the manual shaft at all, with it staying in situ throughout the operation ??

Hopefully Clive, will benefit from the above positive news as well !!

Best wishes.

Richard.
1968 Daimler V8-250 Saloon
DLOC East Sussex Branch Secretary
DLOC 2.5L V8 & V8-250 Registrar - https://www.dloc.org.uk/v8-250
DLOC 2024 International Rally - https://www.dloc.org.uk/rally-2024

johnwager
Posts: 74
Joined: Thu Feb 11, 2016 3:26 pm
Location: Thundersley, Essex

Re: V8-250 saloon: BW35 - Manual Shaft Oil Seal

Post by johnwager »

Hi Richard
There is no need to disturb the shaft, or to lower the gearbox at all.
John

classiclife
Classic Wise Man
Classic Wise Man
Posts: 1601
Joined: Wed Sep 05, 2018 9:55 am
Location: Ridgewood - East Sussex
Contact:

Re: V8-250 saloon: BW35 - Manual Shaft Oil Seal

Post by classiclife »

Thanks for confirming, John, much appreciated.

Best wishes.

Richard.
1968 Daimler V8-250 Saloon
DLOC East Sussex Branch Secretary
DLOC 2.5L V8 & V8-250 Registrar - https://www.dloc.org.uk/v8-250
DLOC 2024 International Rally - https://www.dloc.org.uk/rally-2024

classiclife
Classic Wise Man
Classic Wise Man
Posts: 1601
Joined: Wed Sep 05, 2018 9:55 am
Location: Ridgewood - East Sussex
Contact:

Re: V8-250 saloon: BW35 - Manual Shaft Oil Seal

Post by classiclife »

Folks,

Just thought I would update the thread; having completed the job successfully.

As per the advice John gave, it is a straight forward task to replace the seal with the g/box in situ. It is necessary to remove the exhaust heat shield plates to provide better access which will be obvious when you tackle the job.

Once the lever assembly plate (14) is removed plus the associated bits it is then possible to hook the old seal out with ease; the shaft does not need to be disturbed.

I got a couple of seals from DMG, only 1x is required but had an extra on stand-by just in case. With the seal oiled and positioned on the shaft, it is then a simple case of pushing it in to place using a sleeve - I used a thin piece of oversize tube. The oil seal is now in situ and "square", the removed assemblies can then be reconnected accordingly.

Job done. and one less leak to see on the garage floor :D !!

My grateful thanks to John and I hope the above will beneficial for Clive and others who are / may be considering this task at some stage.

Regards.

Richard.
1968 Daimler V8-250 Saloon
DLOC East Sussex Branch Secretary
DLOC 2.5L V8 & V8-250 Registrar - https://www.dloc.org.uk/v8-250
DLOC 2024 International Rally - https://www.dloc.org.uk/rally-2024

Clive
Posts: 19
Joined: Sat May 12, 2018 2:09 am
Location: Phoenix, USA

Re: V8-250 saloon: BW35 - Manual Shaft Oil Seal

Post by Clive »

All,

I finally got round to replacing the seals in situ. Was able to it without removing heat shields or anything.

I used metal picks to remove old seals, took some time. I did not know until I got them out they are miniature lip seals, with steel core.

I used a suitably oversized nut to make sure the new seals went in squarely, being driven by tightening the correct nut on the shaft.

I just have to wait a couple of weeks to see if this cures the leak!

Old and new below. New is on left in both pictures. See the metal core in old one.
20200411_122620_compress83.jpg
20200411_122630_compress41.jpg
Regards and thanks for all the helpful advice,
Clive.

classiclife
Classic Wise Man
Classic Wise Man
Posts: 1601
Joined: Wed Sep 05, 2018 9:55 am
Location: Ridgewood - East Sussex
Contact:

Re: V8-250 saloon: BW35 - Manual Shaft Oil Seal

Post by classiclife »

Hello Clive,

That is excellent news and well done - hopefully your replacement seal will do the job and as I said in an earlier post, one less leak on the floor !!

Ironically I took the gearbox out of the car quite a few months later and replaced it with a 5-speed modern unit. Changing the shaft seal then, would have been a lot easier but I could not wait due to the amount of ATF leaking !!

Thanks for posting + the attached photos.

Regards.

Richard.
1968 Daimler V8-250 Saloon
DLOC East Sussex Branch Secretary
DLOC 2.5L V8 & V8-250 Registrar - https://www.dloc.org.uk/v8-250
DLOC 2024 International Rally - https://www.dloc.org.uk/rally-2024

Post Reply