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Old 04-19-2010, 11:58 PM
How-To Doc How-To Doc is offline
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Join Date: Apr 2010
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All Automatics - Front Bushing Wear

All Automatics - Front Bushing Wear
Author: Subaru
TSB 87-54 (Sept)

SUBJECT: ALL AUTOMATICS

PROBLEM: Front Bushing Wear

CAUSE:
When diagnosing front pump bushing wear, the cause may be:

1) Excessive CONVERTER HUB RUN-OUT. This may, or may not be due to a faulty torque converter.

The torque converter can be checked visually, and with a dial indicator. (See Figure 1) Hub run-out should not exceed .010".

2) BROKEN, BENT OR CRACKED FLYWHEELS can also cause run-out. If the torque-converter-to-flywheel bolts have been loose, the flywheel holes can become egg-shaped, or the torque converter pads may wear into the flywheel, causing run-out.

3) Another possibility is WEAR IN THE CRANKSHAFT, where it supports the torque converter pilot.(See Figure 2)

Often the crankshaft is only worn in a small area where the torque converter pilot has been against it.

If only a portion of the crankshaft is worn, rotate the crankshaft until the worn area is at 12:00 o'clock.

When the torque converter is pushed forward into the crankshaft, the torque converter pilot will bottom on a good portion, and should center properly.

Last edited by How-To Doc; 04-20-2010 at 12:10 AM.
 

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