Packard51	1951 Rear-end change options	#1
Just can't stay away Joined: 2015/10/31 20:38 Last Login : 4/24 9:40 From Kansas Group: Registered Users Posts: 67	Looking to swap the rear-end "90 weight hypoid Gear oil" what would be the equivalent these days?? I assume non-synthetic is completely acceptable because of the quality of the oil available these days vs back then? Posted on: 2023/11/22 13:06

JWL	Re: 1951 Rear-end change options	#2
Home away from home Joined: 2008/2/16 18:39 Last Login : Yesterday 14:41 From Santa Fe Group: Registered Users Posts: 5928	Many of us use 85W-40 GL1 EP gear oil in the differential. It must be extreme pressure rated gear oil. Posted on: 2023/11/22 13:45
	We move toward And make happen What occupies our mind... (W. Scherer)
(2)

Packard51	Re: 1951 Rear-end change options	#3
Just can't stay away Joined: 2015/10/31 20:38 Last Login : 4/24 9:40 From Kansas Group: Registered Users Posts: 67	Thanks!! Posted on: 2023/11/22 14:13

JWL	Re: 1951 Rear-end change options	#4
Home away from home Joined: 2008/2/16 18:39 Last Login : Yesterday 14:41 From Santa Fe Group: Registered Users Posts: 5928	85W-140 GL1 not 85W-40 GL1. Surprised no one caught my typo. Posted on: 2023/11/23 13:58
	We move toward And make happen What occupies our mind... (W. Scherer)

BDeB	Re: 1951 Rear-end change options	#5
Home away from home Joined: 2008/11/28 20:50 Last Login : Today 0:29 From Calgary, AB Canada Group: Registered Users Posts: 1047	GL-1 is straight mineral oil and is not suitable for the EP requirements of hypoid gear differentials. GL-3 or GL-4 is OK. Posted on: 2023/11/23 14:16
	1949 Custom 8

JWL	Re: 1951 Rear-end change options	#6
Home away from home Joined: 2008/2/16 18:39 Last Login : Yesterday 14:41 From Santa Fe Group: Registered Users Posts: 5928	Goops, BIG mistake. GL1 for trans and od and GL4 for differential. Thanks for catching this error. Posted on: 2023/11/24 14:01
	We move toward And make happen What occupies our mind... (W. Scherer)