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Transmission Input Shaft Seal Replacement
 
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Pelican Technical Article:

Transmission Input Shaft Seal Replacement

Jared Fenton

Time:

8 hours8 hrs

Tab:

$25

Talent:

*****

Tools:

M8 triple square driver, floor jack, jack stands, wheel chocks, safety glasses, torque wrench

Applicable Models:

VW Jetta GL (1999-05)
VW Jetta GLS (1999-05)
VW Jetta Wolfsburg (1999)

Parts Required:

Transmission input shaft seal

Hot Tip:

Be sure to use a M8 triple square driver to remove the bolts.

Performance Gain:

Transmission stops leaking

Complementary Modification:

Install new clutch

The transmission input shaft seal is an item that should be replaced whenever you replace the clutch. It is one of those while you're in there items that can sometimes come back to bite you if you DON'T replace it. The seal keeps transmission fluid from leaking past the input shaft. If it does start leaking, you run the risk of soaking the clutch disc with fluid. This can over time render your clutch useless.

Replacing the seal requires you to remove the transmission, throw-out bearing and guide arm from the car. See our articles on Clutch Replacement and Transmission Removal for more information.

The transmission input shaft seal is incorporated into the guide tube for the throw-out bearing on the transmission.
Figure 1

The transmission input shaft seal is incorporated into the guide tube for the throw-out bearing on the transmission. Replacing the input shaft seal requires you to loosen and remove the three M8 triple square bolts (green arrows) holding the guide tube to the transmission. Do not try to use a Torx or Allen head driver here. You need the triple square driver. Once the bolts are removed, pull the guide tube off.

Be sure to inspect the area where the guide tube/shaft seal mates to the transmission around the input shaft (green arrow).
Figure 2

Be sure to inspect the area where the guide tube/shaft seal mates to the transmission around the input shaft (green arrow). Use some clean rags to wipe up the area before installing the new seal.

Shown here is the backside of the guide tube with the seal.
Figure 3

Shown here is the backside of the guide tube with the seal. You can see how heat and wear has caused the seal to crack and rip (green arrow), leading to leaks developing.

And here's the finished result with the guide tube removed.
Figure 4

And here's the finished result with the guide tube removed. Installing the new guide tube/seal is the reverse order of removal.


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Page last updated: Mon 1/16/2017 02:55:51 AM