How much rear end oil?

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KMcoldcars
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How much rear end oil?

Post by KMcoldcars » Fri Jul 01, 2022 6:35 pm

About how much 600W does it take to fill the rear end on a 1916 properly?
I own a 1936 Packard convertible sedan, 1962 Thunderbird, 1991 Corvette, supercharged, a 2000 Corvette convertible and a 1916 coupelet.


Allan
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Re: How much rear end oil?

Post by Allan » Fri Jul 01, 2022 6:46 pm

A 1916 is likely to have the filler hole at the pumpkin centre height. The oil level should be about an Inch below that. Use you little finger to fill to one joint below the hole.
Others may differ in their opinion.
Allan from down under.

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George House
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Re: How much rear end oil?

Post by George House » Fri Jul 01, 2022 6:52 pm

Allan, which side of the rear end housing would that oil filler plug be on; the driver’s or passenger’s ? 😜
BTW, your advice is spot on 😁🇺🇦
I don’t know why I turned out this way. My parents were decent people 🤪


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Re: How much rear end oil?

Post by Kerry » Fri Jul 01, 2022 6:53 pm

How much oil? well the vendors sell it by the qt and list that only one is required.


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KMcoldcars
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Re: How much rear end oil?

Post by KMcoldcars » Fri Jul 01, 2022 7:11 pm

On my 1916 the filler hole is on the passenger's side. Thank you for the responses.
I made a mistake when I stated it was on the driver's side. Another senior moment.
Last edited by KMcoldcars on Sat Jul 02, 2022 12:03 pm, edited 2 times in total.
I own a 1936 Packard convertible sedan, 1962 Thunderbird, 1991 Corvette, supercharged, a 2000 Corvette convertible and a 1916 coupelet.

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RajoRacer
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Re: How much rear end oil?

Post by RajoRacer » Fri Jul 01, 2022 7:47 pm

Usually a bit over 1/2 a quart Keith.


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Re: How much rear end oil?

Post by Kerry » Fri Jul 01, 2022 8:46 pm

Keith, all the T's are the same, oil filler plug is on the right side housing so if you say yours is on the drivers side then you must have a RHD Canadian T.

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Oldav8tor
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Re: How much rear end oil?

Post by Oldav8tor » Fri Jul 01, 2022 9:48 pm

I estimate my 17 takes about 20 oz - that puts the level about an inch below the filler.
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Re: How much rear end oil?

Post by Chris Instness » Sat Jul 02, 2022 12:10 am

0AFCBE85-D3E8-4EB3-834E-9EA617A64113.jpeg
This is from a 1920’s Texaco gear oil brochure. It shows just enough oil to cover the bottom of the ring gear.


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Re: How much rear end oil?

Post by Altair » Sat Jul 02, 2022 12:29 am

Every body will offer a different opinion as to the amount and weight because originally it was two LBS of non flowing grease and in many manuals the "oil" plug is referred to as a "grease plug". There was never a "drain" plug because you could not drain the grease. I am not saying this was any better just saying how it was. The differentials came with no 'oil' seals only dust covers at the ends of the axles. With too much oil, it will migrate out the ends of the axles. There are accessory seals today some work and some don't.


Topic author
KMcoldcars
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Re: How much rear end oil?

Post by KMcoldcars » Sun Jul 03, 2022 10:40 am

I put in somewhere between a pint and a quart. The oil level is about 1 inch below the fill plug. It is difficult to know exactly how much I installed as the container is opaque.
I own a 1936 Packard convertible sedan, 1962 Thunderbird, 1991 Corvette, supercharged, a 2000 Corvette convertible and a 1916 coupelet.


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Re: How much rear end oil?

Post by jiminbartow » Sun Jul 03, 2022 1:47 pm

I believe my ‘26 coupe took exactly one quart of 600w. When I replaced the oil, I had just fInished rebuilding the rear end and the pumpkin and gear cage was bone dry. If you are unable to completely remove the oil/grease from the pumpkin and from the gear cage, the amount of oil it takes will most likely be much less than one quart. Changing the rear end gear oil is one of the messiest and most undesirable jobs on the Model T. Jim Patrick

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Re: How much rear end oil?

Post by mbowen » Mon Jul 04, 2022 12:50 am

The pumpkin on my ‘24 touring has the plug below the midline of the axles and when I removed it to check the grease, oil gushed out and took a little while to drain down to the bottom of the hole. The oil was significantly thinner than gear oil, so I suspect engine oil is finding its way down the drive shaft tube. I suctioned all the remaining oil out and verified with a borescope that it was all out. It took just a hair over half a quart of 600W to refill to the bottom of the hole. I’ve driven it about 200 miles since then, and the oil leak at one of the rear hubs has dried up.
Miles
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Re: How much rear end oil?

Post by MWalker » Mon Jul 04, 2022 10:21 am

Tim Juhl is correct. 20 ounces or 1-1/4 pints.


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Re: How much rear end oil?

Post by Original Smith » Mon Jul 04, 2022 5:12 pm

The old Texaco ad above says it all. Don't forget the pre 1918 filler plugs are higher than after 1918.


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Re: How much rear end oil?

Post by Kerry » Mon Jul 04, 2022 6:11 pm

Canadian T's had the lower filler plug as early as 1915.

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