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Old 08-12-2015, 08:59 PM   #1
The Mad Hatter
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Default Infamous input shaft seal (quill bearing) questions I could not find answers to

Hello all! I just recently acquired my second Saturn, this one an 02 SC2 5 speed. The PO told me its leaking transmission fluid. I believe its the "quill bearing", and I've read 20 some posts about this now. I realize the trans has to come out and apart to fix this, but is doing so a sure fire fix, or does this problem come back? I've also read that the input shaft can get grooved when the bearing goes, causing it to leak even after a new seal is installed? How likely is that to happen? I want to fix this car and keep it a long time. Right now i'm thinking get a junkyard trans (as best a one i can find), have its quill bearing replaced and put it in myself may be the least expensive way to do this permanently (or as long as possible). I've also seen some mentions that the upper engine mount being replaced can "realign" the engine/trans, stopping/slowing the leak. Truth or hokum? I appreciate any thoughts on these questions, I haven't seen the answers to them in the many quill bearing posts i've read. My poor old SW1 doesn't have much left in her, so I'd like to get the coupe up and running. Thanks!

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Old 08-13-2015, 12:13 AM   #2
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Default Re: Infamous input shaft seal (quill bearing) questions I could not find answers to

The power-train mounts will have no effect on the alignment between the engine and trans. The trans should be firmly attached to the engine, no movement available! Sleeves for repairing a worn seal area on the shaft are probably available, but usually the shaft doesn't wear all that much, a new seal should take care of it for a long time to come.

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Old 08-13-2015, 01:15 AM   #3
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Default Re: Infamous input shaft seal (quill bearing) questions I could not find answers to

There will be no groove, The bearing-seal assembly is a RockAuto 16.00 part. Trans must come out and apart. You can easily bust the bell housing if you do not perform this job correctly. It can be done at home with simple tools. If that seal is leaking your clutch is also shot and if you replace it use a LUK 04-115 which is for the 99 and older as it is cheaper and has a better feel or upgrade to a stage 2 clutch. You will need a new flywheel as it will cost more to resurface the old one.
This is the part, ACDELCO 21120405 and it is called the input shaft bearing under manual transmission.

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Old 08-13-2015, 11:40 AM   #4
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Default Re: Infamous input shaft seal (quill bearing) questions I could not find answers to

I had the same problem found it best to find a junk yard tranny with low miles. I found one with 166k on it and did not put a new quill bearing in right away as the last one went almost 300k on it before it went bad. Can i ask how many miles are on your car? Just curious to know when your bearing went bad compared to mine

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Old 08-13-2015, 07:15 PM   #5
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Default Re: Infamous input shaft seal (quill bearing) questions I could not find answers to

Seal failure is age related more so than miles related.

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Old 08-14-2015, 01:53 PM   #6
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Default Re: Infamous input shaft seal (quill bearing) questions I could not find answers to

Around me you can get a transmission w/o warranty from the yard for $40. If you can I'd try that.. that way you can do the disassemble while minimizing downtime. I'd also weld or dowel the differential pin while you're in there as well as replace any additional seals..

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Old 08-14-2015, 03:20 PM   #7
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Default Re: Infamous input shaft seal (quill bearing) questions I could not find answers to

Just drive it until there is a problem. My daughter has one that has been leaking for well over 75k miles and the vehicle has 200k+ now in the original clutch with no signs of issue.

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Old 08-15-2015, 12:59 AM   #8
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Default Re: Infamous input shaft seal (quill bearing) questions I could not find answers to

Is the quill bearing the same as the one in the MP2 transmission? I bought one from GM special order and found out the diff pin ejected so I never needed it.

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Old 08-15-2015, 01:04 AM   #9
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Default Re: Infamous input shaft seal (quill bearing) questions I could not find answers to

MP-2 or MP-3 same part.

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Old 08-19-2015, 08:16 AM   #10
The Mad Hatter
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Default Re: Infamous input shaft seal (quill bearing) questions I could not find answers to

I appreciate the info guys! Sorry for the slow response, was sent out of town for work.

The car is an 02, with 163K miles, but was ridden hard by the previous owner. He parked it when he noticed trans fluid leaking, and subsequently sold it to me. I haven't gotten it cleaned up underneath yet to determine if its quill bearing or diff pin failure, but while i was researching both I had those questions from my original post. Thanks for the answers! I'll check in once i get a good look at it.

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Old 08-19-2015, 08:58 AM   #11
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Default Re: Infamous input shaft seal (quill bearing) questions I could not find answers to

I think I answered before, diff pin check is easy with it all in the car. If you are going to do an input shaft bearing then ask how to do it before you break the bell housing! It is a quick DIY job if you have the info.

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