Fitting new thrust washers in rear axle

Topics Last Day Last Week Tree View    Getting Started Formatting Troubleshooting Program Credits    New Messages Keyword Search Contact Moderators Edit Profile Administration
Model T Ford Forum: Forum 2012: Fitting new thrust washers in rear axle
Top of pagePrevious messageNext messageBottom of page Link to this message  By Bob Diederich on Sunday, July 29, 2012 - 10:08 am:

I replaced the thrust washers in the axle. I checked the old washers for size and added a few thousands for wear. The old washers were Babbitt and looked very good but I changed them. I made the new ones about 3 to 4 thousands thicker than the old ones. I reassembled the housings and now the drive shaft will not slide into the ring gear. How are you going to check the gear lash and gear pattern with the housings in place? I have looked in all the Model T books I have and could not find how to find how thick you make the thrust washers. before I tried to install the drive shaft I made sure the carrier turned and was not bound up. Thanks in advance for any help you can give me. Bob


Top of pagePrevious messageNext messageBottom of page Link to this message  By Steve Jelf, Parkerfield KS on Sunday, July 29, 2012 - 10:22 am:

I haven't looked lately, but doesn't Glen cover this in the MTFCA axle book?


Top of pagePrevious messageNext messageBottom of page Link to this message  By james dimit - north cental foc on Sunday, July 29, 2012 - 11:38 am:

You have to use 1 side of the housing and the driveshaft to set the backlash on the ring and pinion, then fit the washer on the other side to the second housing.

I hope this picture will help, axle housing verticle, driveshaft horizontal. Jim


Top of pagePrevious messageNext messageBottom of page Link to this message  By Allan Richard Bennett on Monday, July 30, 2012 - 06:19 am:

Bob, James's photo shows how the backlash is checked. However, there are some tricks to getting it done. I presume the assembly rotated freely when you had the two halves bolted together, so the clearances should be OK. If you set it up as in the photo and the backlash is too tight, then the diff centre needs to be moved away from the pinion.
This can be done in two ways, by shimming the driveshaft assembly out with gaskets between the spool and the housing, or, by juggling the thrust washers and thrust plates. When I re-build a diff I like to make the thrust washers two different thicknesses, by .007 -.010" This lets me juggle the washers to get the spacing correct for the backlash.

Hope this helps.

Allan from down under.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Jerry VanOoteghem on Monday, July 30, 2012 - 12:47 pm:

Shimming the driveshaft assy. out or adjusting the thrust bearing thickness does not produce the same result, as suggested above. If you have binding, you will certainly need to do one or the other to correct it but, it depends on where along the tooth face the binding is occurring.
If the gear teeth bind near the "big end" of the pinion, then the pinion needs to be shimmed back. If the gear teeth contact is even along the tooth face but simply meshing too close to each other, then the thrust bearing needs to be trimmed to move the ring gear away from the pinion.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Dan Treace, North FL on Monday, July 30, 2012 - 10:47 pm:

Bob

You just may have a simple install problem and the ring lash could be ok.

The torque tube won't slide into the housing if they are bolted together, release the bolts around the pumpkin so that the lock washers are loose, then the flange of the pinion housing/pinion gear will side into the rear housing as the sections are parted somewhat.


Posting is currently disabled in this topic. Contact your discussion moderator for more information.
Topics Last Day Last Week Tree View    Getting Started Formatting Troubleshooting Program Credits    New Messages Keyword Search Contact Moderators Edit Profile Administration