Differentials

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jeffstag
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Differentials

Post by jeffstag » Fri Oct 08, 2021 3:31 pm

D47281E6-366B-4D27-A710-7FFD3D107ECA.jpeg
What is the difference in these differentials ?
23 Touring
23 Fordor
25 TT
27 TT
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speedytinc
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Re: Differentials

Post by speedytinc » Fri Oct 08, 2021 3:35 pm

Flip em over. One probably has the long thru bolts (left?). The other studs?
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jeffstag
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Re: Differentials

Post by jeffstag » Fri Oct 08, 2021 3:39 pm

2D941E39-FD44-4901-99E1-5C9B9592D628.jpeg
Correct
23 Touring
23 Fordor
25 TT
27 TT
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Topic author
jeffstag
Posts: 142
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Re: Differentials

Post by jeffstag » Fri Oct 08, 2021 3:40 pm

But what does that mean in terms of yeas used?
23 Touring
23 Fordor
25 TT
27 TT
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speedytinc
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Re: Differentials

Post by speedytinc » Fri Oct 08, 2021 3:43 pm

I prefer the security of the thru bolt style. If you use the stud type, the wire nuts together, no cotter pins.
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speedytinc
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Re: Differentials

Post by speedytinc » Fri Oct 08, 2021 3:45 pm

jeffstag wrote: ↑
Fri Oct 08, 2021 3:40 pm
 But what does that mean in terms of yeas used?
Left is later style. Dont know the year they changed off the top. A trip to McCally will be in order.
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DHort
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Re: Differentials

Post by DHort » Fri Oct 08, 2021 4:05 pm

The one on the left has grooves cut in the top and the spider gear appears to be out of alignment.
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jeffstag
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Re: Differentials

Post by jeffstag » Fri Oct 08, 2021 4:18 pm

I have several with those grooves. If we’re looking at the same thing those are supposed to be there. Here’s another one with the grooves
E37F7CAB-5ED4-4C21-80A7-30637C0C60C6.jpeg
23 Touring
23 Fordor
25 TT
27 TT
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Topic author
jeffstag
Posts: 142
Joined: Thu Mar 14, 2019 12:53 pm
First Name: Jeff
Last Name: Versteeg
* REQUIRED* Type and Year of Model Ts owned: '27 TT, '25 TT, '23 Fordor, '23 Touring
Location: Petersburg, MI
Contact:
Contact jeffstag

Re: Differentials

Post by jeffstag » Fri Oct 08, 2021 4:22 pm

It looks like I can mix and match the different styles of differential halves. I can used the bottom half with the thru bolts, and then go with a top half with or without grooves. Both look good in terms of wear.
23 Touring
23 Fordor
25 TT
27 TT
Top

speedytinc
Posts: 4725
Joined: Fri Feb 12, 2021 12:24 pm
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* REQUIRED* Type and Year of Model Ts owned: 14/15 wide track roadster. 23 touring, 27 roadster pickup, 20ish rajo touring
Location: orange, ca
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Re: Differentials

Post by speedytinc » Fri Oct 08, 2021 4:40 pm

jeffstag wrote: ↑
Fri Oct 08, 2021 4:22 pm
 It looks like I can mix and match the different styles of differential halves. I can used the bottom half with the thru bolts, and then go with a top half with or without grooves. Both look good in terms of wear.
I have switched tops. The axle gear hole is/was originally 1.812" Measure them, to know for sure.
A best guess on the stud type usage is 14-20,21. The first gen after the 1.807" axle gears.
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