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I need some help. I’m trying to fix SROD transmission on my 1981 F150 and I need a dummy shaft part T64P-7111-A, but I can’t find one anywhere. Does anyone have one I could borrow for a bit or that they would be willing to sell me?
What dose this shaft do and where is it. inside the trans?
Is it used to hold bearing and gears together, the assy dropped into the trans case and the shaft pulled out?
Dave ----
The dummy shaft is driven in to remove the shaft that holds the gear clusters in place so that they stay in place but allows the gears to be dropped to the bottom of the case for removal.
This is a tool for assembly/disassembly, right? How critical are the dimensions? Some older Jeep transmissions used a similar tool. I just used a piece of pipe that was close enough in size.
I was thinking a wood dowel but if you need to drive out the metal shaft that may not work.
That would depend. If you have to wail on the dummy shaft with a hammer during assembly, you’d probably leave splinters behind.
If only an issue during disassembly, a little debris would not be a big deal if all parts either get cleaned or replaced.
IIRC, on the transmissions I’ve done, the dummy shaft is just a spacer during assembly. You push it out with the real shaft. You then drive the real shaft home the last inch or so with a brass hammer. Any hammering (and possible debris) is on the outside. I don’t know if this transmission is the same.
On a related note, use heavy grease to hold the individual rollers in place during assembly. It’s been a while, but I think you build them up on the dummy shaft and then carefully slide the whole shooting match inside the cluster gear. When you drive out the dummy shaft, the rollers stay behind inside the cluster gear.
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