Okay,
Take a look a the information posted at this link:
http://www.quantumechanics.com/categories.php?op=newindex&catid=11
After reviewing the information from the link above from the guys that know
a heck of lot more than I concerning overdrives and trannys, I chose to go
with straight grade SAE30 oil; in my D-Type overdrive when I installed it in
my Spit. I have no delay in engagement or disengagement and no slippage at
all. Trans shifts smoothly and no noisy gears. Also, keep in mind that
engine oil and gear oil viscosities are not rated on the same scale. At the
same temps, 30 weight motor oil and 90 weight gear oil are very similar in
viscosity. Just my opinion - YMMV.
Tony Childs
72 Spitfire
FK38809UO
-----Original Message-----
From: triumphs-bounces+tochilds=bellsouth.net@autox.team.net
[mailto:triumphs-bounces+tochilds=bellsouth.net@autox.team.net] On Behalf Of
Tobin, Greg
Sent: Friday, September 05, 2008 12:29 PM
To: triumphs@autox.team.net
Subject: Re: [TR] gearbox oil
> Hi: What is the correct gearbox oil to use. In"How to restore a Triumph"
> byRoger Williams He say to use ST90 gear oil. But in the TR3 Service
> instruction Manual it says to use SAE 30.
What I've seen on this (the never ending thread) is that pretty much
*anything* is used with success. ATF, 5w30-20w50, gearoil, synthetic 50W,
marvel mystery oil, hydraulic oil for tractors, and no doubt someone is
running home-rendered lard in one too. So maybe try something new and see
what good results you will get too!!! ;)
As a side note, I wonder if this shows the durability (besides the synchros)
of the transmissions????
-greg
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