I was using LE1605 (sixteen zero five) not 1650. I recall 1605 lost its GL5 rating circa 2016 or 2017 and LE1620 was it's replacement but not available in quarts at least then. The 1620 I have was decanted from bulk by a third party and sold in quart bottles. I also recall a conversation (or possibly a dream ) with Lubrication Engineers that 1605 really didn't lose certification but that LE made so little of it they didn't renew the certification. Or something...

Back to basics: Use GL5 hypoid gear oil. Pick whatever gives you that warm fizzy feeling even if it's Amsoil.

-- Chuck

 

Thanks for the great flow of info. I will be looking for Amsoil 75 W 110 GL5 and pray that it says the word Hypoid on it

 

The Amsoil severe gear oil bottles in my garage have the verbiage quoted in Post 4. Back of the bottle and fairly fine print but it's there.

-- Chuck

 

If its GL5, its hypoid

 

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