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Old 10-27-2020, 09:09 PM   #1
cgg17
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Default Saturn Quill Bearing/ Seal

Hello all,
I have been working on a project to modify the existing quill bearing/ seal assembly to accept a new bearing and seal.
That being said, I am looking for used, leaky, or just old quill bearing/seal assemblies for cores.
If anybody has some they would like to get rid of, I would love to purchase them.
Thanks,
Chris
...
1994 Sl2 5spd: 56,576 (Totaled 1/10/2018)
1995 Sl2 5spd Manual Swap: 189k
1999 Sl2 4spd: 103k (Sold 2019)
1998 Sl2 5spd: 130k
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Old 10-28-2020, 12:07 AM   #2
TomM96
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Default Re: Saturn Quill Bearing/ Seal

Sorry dumb question--

What is quill bearing on Sat?

They are generally a needle type bearing supporting a hardened shaft?...

So, is the drive shaft going into the transmission in a quill bearing?

Are they normal for transmission driveshafts
because those shafts are hardened, and maybe need a strong centering
effect that a narrow ball/roller bearing might not provide??

I recently saw a disassembled Honda transmission, and most of the shafts seemed supported by normal ball bearings (I don't recall the driveshaft).
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Old 10-28-2020, 01:46 PM   #3
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Default Re: Saturn Quill Bearing/ Seal

Quote:
Originally Posted by TomM96 View Post
Sorry dumb question--

What is quill bearing on Sat?

They are generally a needle type bearing supporting a hardened shaft?...

So, is the drive shaft going into the transmission in a quill bearing?

Are they normal for transmission driveshafts
because those shafts are hardened, and maybe need a strong centering
effect that a narrow ball/roller bearing might not provide??

I recently saw a disassembled Honda transmission, and most of the shafts seemed supported by normal ball bearings (I don't recall the driveshaft).
The passenger side of the input shaft is supported by the quill bearing/ seal assembly. The housing of the assembly is what the throw out bearing is guided by.
The drivers side of the input shaft is supported by a ball bearing, locked into the transmission case with a thick snap ring. This soaks up all of the thrust loading generated in the transmission (horizontal load/ movement), as well as vertical loading from the transmission.
The quill bearing aspect is a needle bearing inside of the casing, as the casing is the race for the rollers to travel on, and the inner portion supports the input shaft directly. This arrangement provides no provisions for thrust loading, as it is not fixed directly to the input shaft via a press fit, it is merely a slip fit. The shaft does not move however, as the other end is supported by a a ball bearing that absorbs all horizontal loading/ movement, mentioned previously.
The seal portion is built into the quill casing, as well as the quill bearing. It is a one piece sealed unit that is pressed into the case. When the seal goes bad, it will leak transmission fluid out, which will find it's way into the clutch disk, rendering the clutch useless.
This part is no longer manufactured, hence the reason why I am putting my developing engineering skills to the test to modify one of these bad assemblies to be serviceable with new, common bearings and seals.

Here's a picture of a leaking one, and the clutch issues the come alongside it.
http://www.saturnfans.com/forums/sho...d.php?t=129661
The common fix for now is to source a transmission that has a known good seal, but as these cars age, that will become a major issue. I am hoping to have a functional assembly by the end of this year. Eventually after testing and confirming that my process is effective, I would like to sell these assemblies to those in need of them, offering a discount for returning the bad seal assembly that is being replaced.
...
1994 Sl2 5spd: 56,576 (Totaled 1/10/2018)
1995 Sl2 5spd Manual Swap: 189k
1999 Sl2 4spd: 103k (Sold 2019)
1998 Sl2 5spd: 130k
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Old 10-29-2020, 01:06 AM   #4
TomM96
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Default Re: Saturn Quill Bearing/ Seal

Thanks, Chris, for the detailed explanation.
It brings to my mind images of the manual trans driveshaft protruding from the case on a VW type3; a VW Rabbit; and a Chevy truck. (my Sat is TAAT)

I read your description here, and also the thread at the link you noted.

The component assembly, with the needle bearings riding inside the casing,
is intriguing. The casing needs be pretty hard, and with precise cylindrical
tolerances.

So, umm maybe another dumb question...
An acquaintance advised me to use a sheet metal screw, screwed into the
flat/plane/axial?/visible part of the seal, to get a purchase on the seal,
and tug it out with pliers or pry it with, like sidecutters under the screw head.
That wouldn't work on this assembly while in the trans case?

The casing & bearing would be securely pressed in place, but the seal
isn't under stress; and the seals have reason to fail - dirty fluid.
So if the bearing is OK, maybe just change seal.

........
Last spring I did some online reading about bearing manufacturers, and discovered that needle bearings are something of a subspecialty.
Timken, SKF and others have some parts catalogs online, and the seal manufacturers might too.

Good luck on the engineering project.
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