2004R rear section end play for my 41 Olds

senginc

Member
I have been restoring/ hot rodding for about 50 yrs (yes I am an old geezer) but had never built an automatic trans, so I thought I would give it a try.

I am maybe confused checking rear section end play, I am using a yoke and a tool I made to push the output shaft in. I am putting a dial indicator on the upper end of the output shaft.
I have both the old and newer ATSG manuals that I am trying to follow (shown below).

When checking rear section end play should I press upward on the output shaft with enough force to compress the lo & reverse clutch housing assemble wave spring (reverse clutch release) ?

It originally had a .136 selective steel washer and it measured ~.035 end play and I bought .157 but it still has about .028 end play. This makes no sense since I added .021 on the selective steel washer selection. Maybe I wasn't pressing up so hard the first time.

I have another 2004R disassembled and checked it not in the case. If I push down hard on the sun gear I get .024 using a feeler gage between the snap ring and the selective steel washer.

I am along way from the desired .004-.010.

Or to ask the question another way, what are the sources of end play in the parts included in this measure ?

I bought a hardened sun shell for the transmission I am building and measuring
Your advice would be appreciated.
rear-section-play-from-manual-jpg.4168694
 
I was able to get the rear section play to .006 in a vise with feeler gauges and .015 in the trans with a dial indicator while pushing up on the yoke.

I was able to get the forward shaft section play to .008 by pulling up with vise grips on the forward drum shaft measuring with a dial indicator (Leaving the output hanging).
I then cranked up the output shaft and got .017 with a dial indicator.

Only 2 more thousandths than rear, is that enough clearance? Or should I change to a thinner small plastic selective washer (I used a #6, .091) to get a little more clearance and compensate for any measurement reading error on my part ?


I don't have the special compression tool for the 4th clutch return spring. What is an alternative ? I probably could fab something using parts of a harmonic balancer puller ?
 
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