Ring gear free spin
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John L
Topic author - Posts: 146
- Joined: Sun Jan 06, 2019 2:39 pm
- First Name: John
- Last Name: Leffler
- * REQUIRED* Type and Year of Model Ts owned: 1923 Coupe, 1927 Touring
- Location: Lebanon PA 17046
Ring gear free spin
Ok ,so I got my differential haves put together with 3 bolt . I can turn the axles free spin with no end play. I can turn my ring gear without any binding. But how free should it spin? I have not put any grease on the inner bearing yet because as I said it is a fit test.
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speedytinc
- Posts: 4726
- Joined: Fri Feb 12, 2021 12:24 pm
- First Name: john
- Last Name: karvaly
- * REQUIRED* Type and Year of Model Ts owned: 14/15 wide track roadster. 23 touring, 27 roadster pickup, 20ish rajo touring
- Location: orange, ca
- Board Member Since: 2020
Re: Ring gear free spin
Should spin VERY freely. 005" minimum- .010.
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Mark Gregush
- Posts: 5370
- Joined: Sat Jan 05, 2019 1:57 pm
- First Name: Mark
- Last Name: Gregush
- * REQUIRED* Type and Year of Model Ts owned: 1925 cutdown PU, 1948 F2 Ford flat head 6 pickup 3 speed
- Location: Portland Or
- Board Member Since: 1999
Re: Ring gear free spin
Should spin VERY freely. 005" minimum- .010. ? I think he is asking about drag on the thrust washers. I set mine to a little drag because there will be some settling in of the bronze thrust washers. If John is talking about tooth clearance, I am of the OP that .005-.010 is too close for this type of setup esp if using stock roller bearings. Even the Model A was around .015. I set the tooth clearance by sound, a light tick tick for me or around .015.
I know the voices aren't real but damn they have some good ideas! 
1925 Cut down pickup
1948 Ford F2 pickup
1925 Cut down pickup
1948 Ford F2 pickup
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speedytinc
- Posts: 4726
- Joined: Fri Feb 12, 2021 12:24 pm
- First Name: john
- Last Name: karvaly
- * REQUIRED* Type and Year of Model Ts owned: 14/15 wide track roadster. 23 touring, 27 roadster pickup, 20ish rajo touring
- Location: orange, ca
- Board Member Since: 2020
Re: Ring gear free spin
OP didnt ask about ring gear mesh. I would not count on a tight thrust washer wearing in quickly. If the OP is intimating some friction @ this point, IMO, its a little tight. A little loose wont hurt anything. A little tight could. Will it get tighter when laid horizontal or when completely assembled or with it mounted under the car? Dont know.Mark Gregush wrote: ↑Fri Aug 06, 2021 6:51 pmShould spin VERY freely. 005" minimum- .010. ? I think he is asking about drag on the thrust washers. I set mine to a little drag because there will be some settling in of the bronze thrust washers. If John is talking about tooth clearance, I am of the OP that .005-.010 is too close for this type of setup esp if using stock roller bearings. Even the Model A was around .015. I set the tooth clearance by sound, a light tick tick for me or around .015.
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jab35
- Posts: 1001
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- First Name: James
- Last Name: Bartsch
- * REQUIRED* Type and Year of Model Ts owned: '26 Coupe
- Location: Dryden, NY 13053
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Re: Ring gear free spin
John: Three bolts AND the housing gasket? Or without gasket? If no gasket and you can turn it by hand you meet the criteria in the rear axle rebuild handbook and are good to go, literally. jb
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speedytinc
- Posts: 4726
- Joined: Fri Feb 12, 2021 12:24 pm
- First Name: john
- Last Name: karvaly
- * REQUIRED* Type and Year of Model Ts owned: 14/15 wide track roadster. 23 touring, 27 roadster pickup, 20ish rajo touring
- Location: orange, ca
- Board Member Since: 2020
Re: Ring gear free spin
That is correct, by the book. The added gasket/shim adds the extra clearance needed if you are using the gasket. The manual says to add the gasket/shim if necessary. There was no mention of using a gasket. I personally dont use a gasket. (Thats where my thinking was) I get the clearance in without it & ultra silicone the housings together. If I am un sure of the clearance, I will add a temporary paper shim under one of the thrust washers. If it locks up : more machining on a bronze washer.