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Topic: Driveshaft yoke lube?

in Forum: C3 Driveline Components


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Driveshaft yoke lube? (1/18)
 10/20/13 11:08am
persico
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Long Valley, NJ - USA

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1972 454 Coupe, 4 speed, Targa Blue with blue interior, luggage rack 2019 Grand Sport Coupe, M7, Ceramic Matrix Gray with gray interior


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Getting ready to re-install my driveshaft after a complete rear end re-build.  Question - do I pre lube the splines in the yoke?  The only info I can find on this topic is conflicting - some say use a heavy duty grease, others say the grease is incompatible with the trans lube and shouldn't be used.  (I have a 4-speed)  Anyone know?  Thanks as always!

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Re: Driveshaft yoke lube? (2/18)
 10/20/13 11:19am
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The driveshaft doesn't move in/out on these cars as it does on mere mortal cars, so lube isn't as big of a deal. A little smidge of grease won't hurt anything at all, but is not really needed. Either way is fine. You can put a little bit of engine oil on the splines, too, without any problems....it's really a non-issue.....the splines will get lubed while driving, anyway. Thumbs Up

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Re: Driveshaft yoke lube? (3/18)
 10/20/13 3:44pm
persico
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Thanks for the prompt reply.  "while I was under there" (those dreaded words!)  I decided to rebuild my shifter.  I had a kit already from Zip so....  anyway upon getting the shifter out, I noticed there is a set screw or stop screw in the shifter mounting bracket, I think it adjusts the amount of sideway travel of the shifter handle when shifting to reverse. Anyway, Bubba welded this on my car so it can't move, should I be concerned and find a new housing or just put it back together and hope the "fixed" adjustment will still work after the rebuild?  PS none of the manuals, AIM or even Corvette Magazine 4 speed shifter rebuild articles mention this adjustable crew??

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Re: Driveshaft yoke lube? (4/18)
 10/21/13 7:17am
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Not ringin a bell with me...I'll look and see can I find some info. Off hand, I don't think it will be a problem re-using the shifter as is. 

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Re: Driveshaft yoke lube? (5/18)
 10/21/13 5:16pm
persico
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No, say it can't be!  Joel did not have an immediate answer!  Probably because of the poor description of the issue on my part.  Here is a pic of the part I was talking about with the set screw which I think limits the amount you can push the shifter to the side when selecting reverse????  Anyway  Bubba welded this screw on my part so no adjustment is possible unless I drill it out and re-tap it, or buy a new one, hoping I don't have to do either!  Thanks.




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Re: Driveshaft yoke lube? (6/18)
 10/21/13 10:14pm
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Yeah...well.....I sleep every now and then.....LOL

I wouldn't worry about the thing being welded. The PO may have had a problem with it backing out or something, and just "fixed" it....I say run it and not worry aboot it. Thumbs Up


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Re: Driveshaft yoke lube? (7/18)
 10/21/13 10:19pm
persico
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Cool, I'll let you know how it goes, thanks

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Re: Driveshaft yoke lube? (8/18)
 10/22/13 11:29am
persico
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One last question (like it's really going to be my last!)  When I disassembled the shift rod linkage, I found nylon bushings on the ends connecting to the shift levers on the transmission, similar to the ones used with the wiper door only a larger diameter.  I do not see these available at any of the parts house suppliers and I don't see them in the AIM diagram.  Have you ever seen these used?  Does anyone know where I can get replacements?  Thanks. 

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Re: Driveshaft yoke lube? (9/18)
 10/22/13 1:50pm
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If the bushings look like a little hat with a hole in the middle, you will need to replace them....they should fit up inside the holes on the shift levers on the trans. Without them, the linkage will be loose. Along with making noise, leaving them out will make it hard to shift properly. The bushings are definitely available....might even find them at your local parts house. HOWEVER....I'm not aware of any Muncie OR BW ST-10 that had bushings there originally. If your linkage has been changed, then it's possible the bushings were need. Most Hurst shifters did need them...

Hurst Pit Pack


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Re: Driveshaft yoke lube? (10/18)
 10/22/13 3:42pm
persico
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Thanks Joel.  I definitely have a stock shifter not a Hurst,  unless someone just changed out the linkage and not the shifter if thats possible??  Another Bubba mystery.  I'll check locally to see if I can find replacements, thanks.

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Re: Driveshaft yoke lube? (11/18)
 10/23/13 1:00pm
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Are your linkage rods AT the trans levers clevis joints, or the more common 90 degree bends on the ends of the linkage rods? SOME years have clevis joints there, which would take no bushings. If you have the plain jane, 90* bends, those might need the bushings.....but again, afaik, they dint use bushings from the factory on the Corvette.

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Re: Driveshaft yoke lube? (12/18)
 10/23/13 1:21pm
persico
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Adams' Apple said: Are your linkage rods AT the trans levers clevis joints, or the more common 90 degree bends on the ends of the linkage rods? SOME years have clevis joints there, which would take no bushings. If you have the plain jane, 90* bends, those might need the bushings.....but again, afaik, they dint use bushings from the factory on the Corvette.

Now the plot really thickens! At the trans joints I seem to have the plain jane 90 degree bends on the forward most and rearmost lever (3rd-4th shift lever and reverse shift lever)  The middle one had a clevis (actually Bubba had a bolt with a hole drilled through it for a cotter pin!)  However this is actually the config the aim shows.  See below.  I ordered the Hurst  Pit Pack to see if the bushings that come with it will fit.  I will let you all know!



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Re: Driveshaft yoke lube? (13/18)
 10/23/13 10:39pm
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Thumbs Up

That looks correct.


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Re: Driveshaft yoke lube? (14/18)
 10/28/13 11:20am
persico
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UPDATE - I could not find the nylon bushings at any of the Corvette Supply houses, my local parts guys or hardware stores.  However, for those of you in need the Hurst Pit Pack from Hurst had the right ones!  For $7.95 + $3.99 on handling on eBay I got 6 of them and the G-Clips.. (I previously paid $6.25 for 5 G-Clips alone form Zip!)  One step closer.  

PS  Everything I read about rebuilding the 4 speed shifter talks about how to rebuild the shifter itself, which is fairly easy, no one mentions how difficult it is to get out of the car!  Unless I was doing something wrong I had to unbolt the bracket that mounts the shifter to the transmission to to get better access to the bolts that hold the shifter to the bracket!  The linkage connections are also a bear trying to squeeze past the exhaust.  I have the car raised about 2 feet off the floor on RaceRamps and the entire interior out and it was still tough.  Live and learn!


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Re: Driveshaft yoke lube? (15/18)
 10/28/13 12:50pm
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persico said:PS  Everything I read about rebuilding the 4 speed shifter talks about how to rebuild the shifter itself, which is fairly easy, no one mentions how difficult it is to get out of the car!  Unless I was doing something wrong I had to unbolt the bracket that mounts the shifter to the transmission to to get better access to the bolts that hold the shifter to the bracket!  The linkage connections are also a bear trying to squeeze past the exhaust.  I have the car raised about 2 feet off the floor on RaceRamps and the entire interior out and it was still tough.  Live and learn!

LOL
Nope...yer not doing it wrong...they ARE a pita to get in/out, even in the air. The older cars, with the shifter actually bolted to the trans are MUCH easier to deal with.....two bolts, and done!
Thanks for the info on the bushings.....still strange why your set-up needs them....Ermm



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Update #2! (16/18)
 11/3/13 4:18pm
persico
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So, got the shifter and bracket bolted back in, now trying to adjust the linkage.  Got the "positioning tool" inserted into shifter - after making my own, (the one I bought was a 3" piece of metal that would have challenged a Cirque de Soliel contortionist to get inserted while the shifter is mounted on car, so I created a longer "L" shaped one so I could manipulate from the inside of the car).  Next I dutifully adjusted the swivels on the shifter rod linkage so the line up with the holes in the shift levers while the latter were in the nuetral position.  I was able to get the 1st-2nd one and reverse ones clipped but, short of finding one of those shrinking rays they used on Rachel Welch in Fantastic Voyage,  I don't know how to get the "G" clip on the top most shift rod.  Also is there some trick to inserting these things, I've use brute force but I'm sure I'm doing it wrong???

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Re: Driveshaft yoke lube? (17/18)
 11/17/13 6:32pm
persico
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Joel, I think I figured out why I have the nylon bushings on my shift linkage.  Somoene switched the levers that mount to the tranny with others (must be Hurst) see pic below with shifter rod attached - only one hole.  I didnt realize they were different until I started reading about guys switching their linkage to the lower hole for short throw - it was then I noticed I didnt have a second set of holes!  Oh well.  got everything back together  needs a little more adjustment but I may take it to a professional since I tried my best alreay.  I do need to change the transmission rear seal before putting driveshaft back, any hints for getting that seal off.  I notice it seats pretty far down.  It tried prying but was afraid to damage anything, maybe rent a a puller?  Thanks again!




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Re: Driveshaft yoke lube? (18/18)
 11/18/13 1:33pm
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Definitely NOT OE levers...LOL
OE levers only had the rectangular slots. Also...original levers never had two sets of holes, either. I believe you could get short shift levers from the dealer, or aftermarket, but not from the factory...at least not on these cars.
Rear seal is an easy job. Just use a flat head screwdriver, get in behind the seal, and pop that bugger out. Not gunna hurt anything at all. The new seal will most likely have a flange/edge on it, so it will only go in so far, and it wills eat on the tail housing. Thumbs Up

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