In the owners handbook that came with my Morgan, the oil recommendation =
for the trans. was 30 SAE motor oil. Around 1968 I found that Jaguar =
had changed the oil recommendation to a 90 EP gear oil for all of the =
Moss built and Jaguar built versions of this gear box. After studying =
the construction and lubrication of the gear box, I came to the =
conclusion that the extra protection provided by the extreme pressure =
additives in the 90 or 80-90 EP GL-5 gear oils would be advantageous. I =
also wished to improve the synchronizer action and help prevent wear of =
the synchronizer cones which are part of each gear in a Moss box. I =
first started using GM Limited Slip Differential Gear Oil. In a newly =
rebuilt box with the shifting hub preloads set up correctly, and unworn =
syncro cones, this oil completely prevented any wear of the syncros and =
the syncromesh worked great. In the early 70's, the Sperm Whale oil =
which had been used in this GM oil could no longer be used because of =
the banning of whale hunting. The oil was reformulated. It still =
continued to work well. As lubrication technology advances, I am always =
on the lookout for something better and have found that Red Line =
synthetic lubricants are excellent products. I have tried MTL in the =
Moss box in my 1964 E Type and it woks well. The box is rather tired, =
with all of the shifting hub preloads way to soft, so the syncros don't =
work very well. I think that the MTL made a minor improvement. The main =
thing is that the oil has very good film strength and EP characteristics =
so it gives very good protection to the gear box components. I still am =
using a Chevron Delo 70-80-90 GL-5 gear oil with a MoS4 additive in =
my Morgan that I race. It also works very well. The only drawback to =
using a 80- 90 or 90 EP gear oil might be in extremely cold weather, =
when it might be hard to shift when cold because of the heavier oil. By =
the way, a 90 EP gear oil is about the viscosity of a 40 weight motor =
oil . Its viscosity is measured in a different way than regular motor =
oils.
-----Original Message-----
From: Fred Schuchard [SMTP:fschuch@jaguarsystems.com]
Sent: Thursday, October 01, 1998 5:02 PM
To: Greg Solow
Subject: Red Line MTL
Hi Greg,
Could you please expand on your Red Line MTL transmission oil
recommendation? My Moss box seems OK but is definitely easier to shift =
when
cold. When I bought the car, I found EP90 gear oil in the transmission
which I promptly replaced with 30w non-detergent motor oil which =
improved
the ease of shifting. However, your reference to the Red Line product
sounds interesting.
Many thanks,
Fred Schuchard
63 Plus 4 DHC # 5202
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