44RH - A500 build question. Reverse Drum snap ring/thrust washer questions.

In the middle of building a transmission as the title mentions. The unit has excessive end play and had clearly lived a hard life in the 91 318 truck it came from.

There was no thrust washer under the reverse drum to support snap ring when I took the unit apart. I can clearly see some witness marks on the inner face of the drum where something was rubbing at one point. All the parts drawings I see show an up tab thrust washer then snap ring at this connection.

My problem is the thrust washers in my kit are too thick for the snap ring to install correctly into the groove.

Question is, are there selective snap rings for the reverse drums? Mine is 0.060 thick. I figure I could get a 0.040 snap in there.

Were there units without a thrust washer?

With my new Sonnax OD support I have about 0.030 end play without the thrust washer. My worn stock unit has .040 and still won’t fit the snap ring with the thrust washer.

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