BW 35 rear oil seal

R

ripvanwinkle

New Member
Hi
I just went to dig RVW out of its winter hibernation . I found a puddle of oil under the car which seems to be from a leak at the back of the BW 35 auto box.I fear this is a result of a failed oil seal although the dip stick shows the box oil level is OK and the engine oil level is also OK,
I need to jack up the car to confirm the source of the leak . Is it possible to replace the gear box rear oil seal with the box in place on the car ??
Cheers
RVW
 
You can replace the rear oil seal in-situ, but the level in the box should never be so high as to allow fluid to be right beside the seal so it can just run out if the seal is faulty. I would think the converter has drained back into the box while the car has been standing, so increasing the level to such an extent that it has run out through the seal. Obviously as you've had the car running to check the level it will appear correct now because it has refilled the converter.
 
Harvey ,
Thanks for your quick response
I haven't started the engine yet . I was worried I could do expensive damage considering the amount of oil which appears to have been lost . I simply dipped the box as it stood after a winter in the garage and found both the engine an auto box oil levels were OK .It's possible the box was over filled . I followed the instructions carefully but couldn't really get a sensible reading on the dip stick , even when using chalk . The dip tube seems to hold oil which gets onto the dip stick and gives misleading readings .
Is it worthwhile cleaning up the mess , starting the engine and then doing the full " proper round the box and back to park level check " before starting to rip things apart ??
There was no loss of tranny fluid when the car was used last summer . in fact this was the only thing which didn't leak last Spring !! .
Cheers
RVW
 
If the car has stood without being run over the entire winter then I'd start it and run through the normal procedure for checking the level. If you haven't added fluid then the amount that is in there now is the amount that was in there when you were using the car last year, less the amount that is on the floor. They can be difficult to get a clear reading, if after you've checked it it still looks like the level is too high because there is fluid all over the dipstick, try taking a level with the dipstick 1" higher than it should be (not pushed all the way home) if you get a clear level reading then, you know the fluid level is 1" higher than it should be. I would think that the converter has drained back into the box over the winter.
 
Harvey
I started up RVW drove around and parked while I cleaned up the garage floor . The box changed perfectly , there was no leakage when I parked . I did a proper tranny oil level check and all is well . There are no tranny oil leaks now .
Many thanks for your advice . You saved me from the hands of the tranny menders .
Cheers
RVW
 
Re: BW 35 rear oil seal UPDATE

Hi
I thought you might like an update . Following my original panic RVW has now been out and about for a month. No more oil leaks , no drips on the driveway . All is well . It was simply a case of too much fluid in the tranny . The moral?? Check the fluid level carefully[twice ]before " topping up "!!
Cheers
RVW
 
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