[TR] TR3 Rear End

[William Smith]

Dave,

I noticed from the picture that this Redline gear oil is GL5.  If your
differential still has brass bits in it, the additives in GL5 may eat them
away.  To be safe, I'd stick with GL4.
GL4 is seldom seen in local parts stores, but can be sourced from the usual
British parts suppliers.

Bill Smith
'72 TR6
'80 TR7

On Thu, May 7, 2026, 4:19 PM <triumphs-request at autox.team.net> wrote:

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> ---------- Forwarded message ----------
> From: dave northrup <dave at ranteer.com>
> To: list Triumph <triumphs at autox.team.net>
> Cc:
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> Date: Thu, 7 May 2026 16:17:54 +0000
> Subject: [TR] TR3 rear end
> I happen to have several bottles of this.   Any reason not to use it in
> the differential on my 58 TR3a?  It was just rebuilt and i need to fill it
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