trany .. - United Bimmer Community

**max79** · 01-26-2008, 02:06 PM

any body tell me what is the smaller sump for? coz when i had changed the trany oil i open only the big sump? is that enough? or i have also to open the small one?
is that why i have knock (knock once) on last shift?

**Maxi** · 01-27-2008, 04:42 AM

you have to open the small sump also. but I'm not sure about your knock where is it comming. I think it's like what I heard, some sealings making leaking of oil insid.
Hope you find a solution.
for more information, check this website.
http://www.pelicanparts.com/bmw/tech...Fluid_Auto.htm

**max79** · 01-27-2008, 06:36 AM

one more quuestion dose the gearbox oil moving in the gearbox,,,,

**cabrit** · 02-15-2008, 01:04 PM

i had something similar to that after a tranny flush come to find out mechanic forgot to put tarnny filter but yes ou have to fill the second one at least to half

**Danucksjoe** · 02-15-2008, 06:09 PM

Quote:

Originally Posted by max79

one more quuestion dose the gearbox oil moving in the gearbox,,,,

yes oil circulates inside the tranny, to the oil cooler behind the bumper and back. From the looks of your tranny pictures, you are missing the oil filter in the large sump. That will cause a knock sound if it is missing.

**max79** · 02-16-2008, 04:47 AM

thank u danucksjoe i replace the oil and filter and the knock gone , than u all