Rear end

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Mike Fortney
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* REQUIRED* Type and Year of Model Ts owned: 1917 model t touring 1917 model tt
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Rear end

Post by Mike Fortney » Tue Jun 01, 2021 8:54 am

Do you fill the rear end to the bottom of the fill hole thank you mike

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TWrenn
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Re: Rear end

Post by TWrenn » Tue Jun 01, 2021 9:05 am

Generally just fill it to where you put your little "pinkie finger" in to bend at its first joint the lube touches the end of your finger.
Too much lube oil in there and it'll end up oozing out into your brake drums.


TXGOAT2
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Re: Rear end

Post by TXGOAT2 » Tue Jun 01, 2021 9:16 am

Do the late axles have the fill hole located lower than the earlier ones?

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Steve Jelf
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Re: Rear end

Post by Steve Jelf » Tue Jun 01, 2021 9:18 am

What Tim said applies to the earlier rear axles. In 1919 the filler hole was placed lower on the housing to prevent over-filling with oil. From 1919 on, fill to the hole.
The inevitable often happens.
1915 Runabout
1923 Touring


greenacres36
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Re: Rear end

Post by greenacres36 » Tue Jun 01, 2021 9:19 am

Depends on the year of rear end. Improved cars had a lower fill hole. I bought a 26 Tudor that was filled a finger tip below the hole. When I Took the rear end apart to fix the noise I found that the thrust washers were blew from being hot. It had bronze thrust washers and they were scored from heat. I have safety hubs so I fill it to the bottom of the hole. The hole is much lower on that car then it is my 15.

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TWrenn
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Re: Rear end

Post by TWrenn » Tue Jun 01, 2021 9:39 am

Thanks Steve, I'm used to my earlier cars!! :lol:

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DanTreace
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Re: Rear end

Post by DanTreace » Tue Jun 01, 2021 10:42 am

The early Owner's Manual didn't specify the lube amount for the rear axle housing, but only supplied a drawing with the note to "fill with grease", that did lead to overfill and leaking. The fill plug was at mid-line of the housing on these.
1913 0wners manual.jpg

So, later Ford re-positioned the fill hole to below the mid-line of the axle, and noted "not be more than 1/3 full" and to keep the level " 1 1/2" below the fill hole.
Have done it that way, and used the little pinky to check the fluid level. Some use a bent wire to to it, like a dip stick.
IMG_2136 (700x236) (700x236).jpg

Filling with suction gun, checking with pinky.
rear lube suction tool and measurement.jpg
The best way is always the simplest. The attics of the world are cluttered up with complicated failures. Henry Ford
Don’t find fault, find a remedy; anybody can complain. Henry Ford

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