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  #1  
Old October 25th, 2008, 13:55
XJinWork XJinWork is offline
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SYE and needle bearing?????

Instructions say to remove the needle bearings in the drive gear. Now I've worked on my cars for over 30 years and I am majorly concerned about the drive gear flopping around the machined surface of the new shaft. Can someone give me a valid reason for NOT removing them?
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  #2  
Old October 25th, 2008, 15:21
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Southwest Chuck Southwest Chuck is offline
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Re: SYE and needle bearing?????

Spline shaft won't fit w/o removing them?
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  #3  
Old October 25th, 2008, 15:25
XJinWork XJinWork is offline
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Re: SYE and needle bearing?????

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Originally Posted by Southwest Chuck View Post
Spline shaft won't fit w/o removing them?
I just measured the two and the machined surfaces are the same: 1.970"
The drive gear with the bearing in assymbled just fine. Hence the confusion on removing them.

Edit: It's a '92. The SYE came from Tom Woods packaged with a drive shaft.

Last edited by XJinWork; October 25th, 2008 at 15:33.
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  #4  
Old October 25th, 2008, 15:59
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cal cal is offline
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Re: SYE and needle bearing?????

Call Tom Woods and ask. You'll probably speak with Troy, but both he and Tom are very knowledgeable and free with information.

-C
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  #5  
Old October 25th, 2008, 16:02
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mekcanix mekcanix is offline
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Re: SYE and needle bearing?????

Just did the same thing on Thursday and yep it works that way go figure
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  #6  
Old October 25th, 2008, 16:15
fyrfytr1717 fyrfytr1717 is offline
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Re: SYE and needle bearing?????

What transfer case are you working on? Are you sure you're supposed to take them out and leave them out? That sounds a little odd to me. When installing the Tom Wood SYE in my 242, the needle bearings fell out when I removed the mainshaft, as the instructions indicated they would. During reassembly, they needed to be temporarily held in place on the shaft with a thick layer of grease until the mainshaft was slid back into position. I would really imagine you're supposed to re-install the bearings, but if your kit is for something other than a 242 I have no first hand knowledge.
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  #7  
Old October 25th, 2008, 16:53
XJinWork XJinWork is offline
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Re: SYE and needle bearing?????

Quote:
Call Tom Woods and ask. You'll probably speak with Troy, but both he and Tom are very knowledgeable and free with information.
That's my plan. I just hate wasting the whole weekend because of this.
Quote:
What transfer case are you working on?
It's a 231
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Old October 25th, 2008, 17:03
XJinWork XJinWork is offline
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Re: SYE and needle bearing?????

Quote:
Originally Posted by mekcanix View Post
Just did the same thing on Thursday and yep it works that way go figure
So you're saying that on yours, the difference between the shaft diameter and gear main bore is .310" (2.280" - 1.970")? I can't beleive that. It seems the gear, shaft and chain would self distruct having that kind of slop.
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  #9  
Old October 27th, 2008, 20:30
fyrfytr1717 fyrfytr1717 is offline
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Re: SYE and needle bearing?????

So, were you able to come to some sort of conclusion on this today?
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  #10  
Old October 27th, 2008, 20:37
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Re: SYE and needle bearing?????

i finished mine not that long ago. the surface of the new shaft rides on the machined surface where the needle bearings were. it's a hydrodynamic bearing, like on a crankshaft. i used an arbor press to get mine out. just grease up the surface when you're putting it back together to keep it from getting damaged from looseness and then fill the t-case with proper lube when you're done.
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  #11  
Old October 27th, 2008, 21:08
RCP Phx RCP Phx is offline
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Re: SYE and needle bearing?????

The reason it works is because both the front and rear shafts turn at the same speed(2WD & 4WD),thus zero rpms on the bearing surface!
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  #12  
Old October 27th, 2008, 23:10
XJinWork XJinWork is offline
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Re: SYE and needle bearing?????

Here's what I came up with: Short answer, major brain fart on my part .
- Instructions state "... needle bearings, common on years 87-89."
- Google returned pages showing needle bearings in years about 97-up.
- where does that leave my 92 ... I thought
- On my way to work this morning the light FINIALLY came on. I have "Roller bearings" that need to stay in place .
With the bearings in place the drive gear fits perfectly over the shaft. Nowhere did I see any metion that there might be a different type of bearing used on this gear and my tired mind only saw "... bearing must be removed".

I've reinstall the roller bearings and will press on with the SYE install tomorrow . Thanks.
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