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TR4 gearbox and/or transmission oil


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For gearbox and/or transmission I can get either of the following, but which is recommended:

1. Millers Oil Classic Pistoneeze Gear Oil EP GL4 140W

2. Millers Oil Classic Pistoneeze Gear Oil EP GL4 80W90

Or is something else altogether required?

I searched the forum but either I can't get the search terms right or I get hundreds of irrelevant pages, sorry!

Edited by earckens
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Hi Erik,

as per Bob's comments.

Your choices are too thick/heavy for the gearbox and or Overdrive.

Penrite GB40 is ideal for gears. But heavier oil is fine.

Originally the EP oils were seriously not good for the GB/OD but have improved over the years.   Stay with a GL4 spec oil

The Moss Dynalite looks like a good range of oils from 30 to 140.

My choice for the GB/OD is Penrite GB40

 

Roger

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Thanks for your replies!

I can get Castrol GP SAE50, lower viscosity my supplier does not stock: should I better get another supplier (I definitely want the best)?

 

Edit: there is an overdrive in the transmission

Edited by earckens
clarification
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Penrite Gear 40 for gearbox/overdrive. Millers EP GL4 80/90W for the rear axle. Exactly what I have used for years in 2 cars with no problems.

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6 hours ago, RogerH said:

Hi Erik,

do you know what GL spec the oil is. I can;t see it on my searches.

It does state that it is an engine oil - maybe not the best for GB and OD.

Roger

Hi Roger,

thank you for your reply; this is the Castrol SAE50 in question (in dutch, some text may be understandable, however: sorry for this!): https://www.misteroil.be/nl-be/shop/product/747/castrol-classic-gp

But indeed, it is an engine oil.. So I better look elsewhere at a different supplier.

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