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Tranny fluid
Posted: Mon Mar 27, 2006 3:00 pm
by The Velvet Monkey
Anyone else running 75/140 in their transmissions?
If so, how's it going?
Posted: Mon Mar 27, 2006 3:23 pm
by Lion_Lady
Just switched to Amsoil 75/140 for my 12K. I've only gotten in 200 miles on it so far.
Not noticing anything obviously different... but maybe that just means I'm no longer noticing the shifting? Seems like less "clunk."
P
Amsoil
Posted: Mon Mar 27, 2006 4:11 pm
by The Velvet Monkey
Amsoil is exactly what I plan to use (great product). I like less clunkiness!
Posted: Mon Mar 27, 2006 5:45 pm
by jamais
I first used Mobil 1 brand which I believe is 75-90W. Shifting was still a bit stiff in cold weather. Switching to BMW's synthetic 75-140W and cold shifting was smooth. The difference between the two weights is really amazing.
I still use Mobil 1 75-90W in the rear drive.
Posted: Mon Mar 27, 2006 8:00 pm
by mnnden
I switched to Amzoil 75/140, I noticed a difference right away.( Although I never had any problems with the gearbox or shifting,) I could feel the difference, I think I am going to switch to the Amzoil for the engine also.
Den
Posted: Mon Mar 27, 2006 8:14 pm
by gel9001
As per dealer recomendation, I've been running 75/90 since the beginning both in tranny and final drive.
Posted: Tue Mar 28, 2006 12:45 pm
by Lion_Lady
gel9001 wrote:As per dealer recomendation, I've been running 75/90 since the beginning both in tranny and final drive.
When I stopped in my dealer/shop to pick up the 12k service "bits," I talked to one of the counter guys. (He'd been a service tech in the same shop for at least 5 years, and had JUST made BMW "Master Technician" then decided that he needed regular, 12 months a year income, to buy a house.) At any rate, HE gave me the grade/weight of synthetic oil to get for the drive/tranny. I figure if anyone has a clue which is best, he would.
P
Posted: Tue Mar 28, 2006 9:48 pm
by challey
Just curious, what would be the downside of using 75/140 vs 70/90 gear lube - other than of course voiding the priceless BMW warranty? It seems like the difference is trivial on the cold value and I wouldn't think that 140 weight could have anything but a beneficial effect when everything was fully warmed up.
Posted: Tue Mar 28, 2006 11:24 pm
by Capt. Blackadder
BMW synthetic 75/140 here. Have also tried Motul 75/90 and Amsoil 75/140. All were big improvements on the original oil.
Posted: Wed Mar 29, 2006 9:12 am
by Paul Mihalka
challey wrote:Just curious, what would be the downside of using 75/140 vs 70/90 gear lube - other than of course voiding the priceless BMW warranty? It seems like the difference is trivial on the cold value and I wouldn't think that 140 weight could have anything but a beneficial effect when everything was fully warmed up.
No way using 75/140 gear oil would void the warranty. BMW has it's own highly recommended 75/140 synthetic gear oil.
Posted: Wed Mar 29, 2006 9:38 am
by gagator79
Have been using the 75/140 (Mobile 1 syn) for about 3K miles...no apparent problems and as above...seems a little less 'clunky'.