Bruce,
FWIW, on page 109 of the latest TRF TR-2&3 catalog, it says that GL5 has a
limited slip additive that will corrode brass (syncro cups, bras bushes,
etc.), while GL4 does not contain this additive. The local Pep Boys store
sells both GL5 and GL4 gear oil for about two bucks a quart. I used the GL4
in by tranny (non-OD, sigh...) just in case. I realize this catalog is not
_the_ authoritative source, but this may be worth a thought.
Dennis
-----Original Message-----
From: Graham Stretch [mailto:technical-iwnet@lineone.net]
Sent: Monday, January 24, 2000 3:18 PM
To: bruce britt
Cc: List Triumph
Subject: Re: Tr 4-Speedometer Cable & O/D Lube
Hi Bruce
Don't know about your cable. As to the gearbox oil the original spec for the
o/d was hypoid w75 to refill and hypoid w90 to top up. Yes the modern grades
GL4, GL5 do contain something that attacks the brass/bronze bits. though
what sort of time period we are talking about I don't know (sure someone
will). I usually refill my boxes with hypoid 80 w85 or 85w90 (cant recall
which of the two ratings is right without going to the garage) I buy this by
the gallon (5 litres) at the moment as my A type loves to waste it (building
a box with J type soon). These boxes require the extreme pressure protection
provided by the hypoid oil so I don't think engine oil would be a good idea,
there is probably some underlying cause for the slow engagement. My A type
doesn't like the fact that a gearbox "expert" built the box up using
excessive quantities of blue hylomar, I have already removed one
filter/strainer full of the stuff and the overdrive worked well but I think
it must be full again as it now takes about a mile to come in.
Sorry to digress,
Graham.
----- Original Message -----
From: bruce britt <bebritt@gate.net>
To: Triumph Mailing List <triumphs@autox.team.net>
Sent: Monday, January 24, 2000 9:58 PM
Subject: Tr 4-Speedometer Cable & O/D Lube
>
> Listers,
>
> Sorry to start this thread, but how far is the inner core
> supposed to stick out of the speedometer end of the housing?
> Seems I remember in the past someone mentioning new
> cables may have to be trimmed, to keep from putting too
> much pressure on the magnet.
>
> I really hate to mention this, but I'm confused on the proper Lube to
> put in my O/D-Transmission. I drained out whatever was in it, and put in
> valvoline 85-90 gear lube. GL4, GL5 rating. After about a 1000 miles or
> so my O/D started taking a long time to engage. I've heard/read to use
> engine oil, that gear lube has sulphur or something that damages internal
> parts made of certain materials.
>
> TIA,
>
> Bruce 64 TR 4 CT-37049LO
> bebritt@gate.net
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