Early transmission
 

Hi..
Today i was working on my early gearbox, and when i removed the reverse idler sharft collar, i saw this oil hole..
Is it something that are doing after the car was new, or is it orig..? I have not seen this on the early idler sharft before, but only on the second type..http://imageshack.com/a/img577/2227/kqfg.jpg

Re: Early transmission
 

Per,

I have a couple early transmissions that have the same shaft so it is correct. I also have a couple shafts just like it without the large collar, which are out of a later transmission.

Oddly enough, I also have an NOS early idler shaft with the large collar but no oil holes. Must have been a later production service part.


Deron

Re: Early transmission
 

Per,

That is correct for the early transmission. Oil enters cup at front of reverse idler shaft and exists thru hole is shaft to lube reverse idler gear shaft. On later transmissions the reverse idler gear has a hole drilled between teeth to lube the shaft; the cup at the end of the shaft was eliminated. Of course changes to the shaft and other items also occurred.

Ron

Re: Early transmission
 

I have opened up a couple of early transmissions in which the reverse idler shaft was replace with the newer type - no oil access tube or oil hole in the gear unit. There was no appreciable increase in wear, so have to wonder how effective the oiling via holes really were. Maybe the centrifugal force of the spinning gear just throws off the oil anyway? It sure isn't moving that fast, even at 50 MPH.

Re: Early transmission
 

I would guess that's exactly why the additional machine work was eliminated in the later shafts.

Re: Early transmission
 

Here's the early shaft (left) beside a later shaft (right).

https://lh6.googleusercontent.com/-B...0/DSC05320.JPG

And the original early shaft (top) beside the NOS replacement (bottom).

https://lh4.googleusercontent.com/-c...0/DSC05342.JPG

My guess is that the NOS shaft shown above was manufactured after the production transmissions started using the solid shaft, and would have required changing to the thinner retainer plate.