[TR] Rear axle oil

[dave northrup]

I checked with Macy's Garage in Ohio, who rebuilt the axle, and they gave this oil the ok!

-----Original Message-----
From: John Macartney <johnbmacartney at gmx.com> 
Sent: Thursday, May 7, 2026 4:30 PM
To: dave northrup <dave at ranteer.com>
Cc: triumphs at autox.team.net
Subject: Rear axle oil

Had an early night after spending the day sorting old Standard-Triumph handbooks (among lots of other stuff) and have just checked the grade for Standard Vanguard and TR3/3A as both used the same axle. Factory recommended an 85W90 GL4 type Hypoy as offered by Shell, BP, Castrol, Duckhams, Texaco. IOW, a hyper lube type with an ultra high resistance to shear. Does the stuff you have offer the same lubricity properties? Never heard of it myself but most modern oils are a complete mystery to me anyway. Still can’t get used to the family daily driver only being allowed a 0w20 full synthetic. Pours like water!

Jonmac