Chris,
As far as I know, the tranny is ONLY supposed to be filled with engine oil -
just like it says in all the manuals. I've heard that the OD will not work
very long with 90 wt gear oil. Your 'brit only' mechanic may be steering you
in the wrong direction. Also, 90 wt gear oil in your tranny is probably
hypoid oil which is what should be used in gears (like in the rear end) -
engine oil is not hypoid but has detergents in it. I don't know if hypoid oil
will account for the damage in your tranny but it is not what the factory
intended.
Dr. Doug
-----Original Message-----
From: owner-mgs@autox.team.net On Behalf Of Christopher Delling
Sent: Wednesday, March 18, 1998 8:33 PM
To: 'mgs@autox.team.net'
Subject: Transmission Questions
My B is fitted with a 4-synchro O.D. tranny, which was rebuilt last =
year. It seems that the gears in the tranny have a ceramic like coating =
on the taper that the synchro ring rides on. The bond between the =
coating and the 2nd gear failed, and the coating fell of, rendering the =
synchro useless. This occured very suddenly, one gearchange was fine, =
the next was accomapnied by a crunch of gears, all of which resulted in =
the re-build, after which everything seemed fine for several months.
This spring, when I returned the car to the road after winter storage, I =
noted that the 3rd gear synchro seems to be acting up. It was fine when =
the car was put into storage. All new synchros were fitted during the =
rebuild. =20
I have noted that the tranny oil level is down a bit, below the low =
level mark - I don't know how much down this mark signifies. The =
mechanic who did the work - only does Brit Cars by the way, uses 90 =
weight gear oil in all trannies, and this is what he filled my box with. =
Also, when I drove the car, the temperature was quite a bit lower than =
in the summer when the car gets most of its use.
What is the list wisdom on 90 weight in the trans? Could this account =
for my problem? I know that 20W-50 is the normally reccomended fluid. =
How about the low oil level? Anyone have a feel for how low the =
transmission is if the oil drops below the low mark on the dipstick?
Best Regards,
Chris Delling
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