Question about 2006 Triumph Tr 7
I don't recall which engine the 1972 Spitfire has, but my MG Midget shop manual calls for Castrol Hypoy B90 for temperatures above 15 degrees Fahrenheit, and Hypoy B80 for temperatures below 15 degrees F for the gearbox on the 1500 cc engine. You could just use a multiviscosity gear oil like Valvoline 80w-90 and not worry about the temperature. For the 948 cc, 1098cc, and 1275 cc engines use the same grade oil in the engine, gearbox, and carburettor damper. Castrol 10w-40 should cover all but the coldest temperatures (below 0 degrees F), but honestly are you driving your rag-top in sub-zero temperatures? It was very common for British Motor Company (later known as British Leyland, then Jaguar/Rover/Triumph before being broken into little bite-sized pieces and sold off) to use the same parts in multiple brands such as Hillman, Riley, Morgan, Healy, Austin, Austin Healy, Morris, Morris Garages (MG), Nash Metropolitan, Jaguar, Jensen Healy, the real Mini Cooper, and a dozen other brands. As far as quantity of gear oil, the manual said 2-1/3 pints for the 948/1098/1275 cc models. I couldn't find an amount for the 1500 cc model, but I would guess it is a bit more based on the size of the gear case. Just buy 2 quarts for the 1500. If you don't use all of it on the gearbox, you can use it in the rear end or the steering gear. If you ever want to know how the TR-7 and TR-8 came to be, e-mail me at firstname.lastname@example.org. It is my default account that I check infrequently, so be patient on a response.
Posted on Feb 24, 2009
I have a 1973 Triumph GT6 The Gearbox is the same except it has different ratios. The best oil I have found to use is Castrol Multitrax 80/140 with 10% moreys additive.(no additive with overdrive)
Posted on Jan 05, 2009
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Posted on Jan 02, 2017
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