Borg Warner Transmission yoke

[Rainer S.]

I have a 63 SWC with a Borg Warner 4-speed Trans. The drive shaft, when connected, makes the yoke exposed by 1 1/2" (measured from shoulder to end of trans housing). The yoke shaft length is 3 1/2" from shoulder to end of spline. The spline sticks out of the trans approx. 3/4".
I found out, that the drive shaft is too short (O.A.L. 30.50").I purchased a correct used, driveshaft (O.A.L. 31.25").
Here is my problem:
When installing the new driveshaft, the yoke will not move into the trans far enough to accomodate the longer driveshaft.The yoke bottoms out with 7/8" exposed shaft, and will not allow me to install the drive shaft.
My questions are:
What is the correct length of the shaft on the yoke ? (now 3 1/2", with 3 1/4" spline length).
Could the yoke be too long ?
How much spline engagement should I have ?
How much end play, before bottoming out, should I have on the yoke, installed ?

Should I cut the yoke 1/2" to give me approx 1/4" "to go", and the exposed area on the yoke shaft would be approx 5/8". Spline engagement would be approx. 2 3/4".

Rainer

[Loren L.]

Re: Borg Warner Transmission yoke

It would appear that the main shaft of the Transmission is twisted at the point where the yoke stops. IF your usage is going to be normal/pleasure dring, my transmission guy advises that he would CUT the spines out of the yoke to the distance that would allow full yoke pentration to spec. If ABUSIVE use is your intention, replace the mainshaft on the trans.....and go to church on a regular basis.

[Rainer S.]

Re: Borg Warner Transmission yoke

Thanks, Loren. I think you are spot on with your advise. I am having the spline undercut 3/8". That should do it. The car will be used as a sunday driver, when finished. So the reduced engagement of the spline should be no issue.
Thanks again.

Rainer

[Gary Bishop]

Re: Borg Warner Transmission yoke

Instead of under cutting your Spline, why not put on a shorter passenger yoke and save the long one or sell it to me.

[Christopher R.]

Re: Borg Warner Transmission yoke

Those correct 5" long yokes are rare and expensive. The shorter passenger car versions are common, and therefore should be inexpensive.

[Rainer S.]

Re: Borg Warner Transmission yoke

Thanks everybody for the good advise.I undercut the spline near the flange end, and the yoke slips on OK now, I am able to assemble the driveshaft w/o problems.
One further question: Is there suppose to be a vent hole in the plate, which is pressed in at the flange ? My machinist centerdrilled the plate, in order to grind after chroming the worn O.D. Now there is a 1/8" hole in the plate. Not sure if the hole was there before. Could I leave it, or will oil from the Trans make its way out of it. (Now is the time to plug the hole before re-installation, if nescessary)

Rainer

[Loren L.]

Plug it *NM*

[Rainer S.]

Thanks, will do... Rainer *NM*