Check my yoke out

MilesnMiles · Post by **MilesnMiles** » Mon Jan 23, 17 6:21 pm

Ok chaps, what do you think? About 2" in from the end the yoke is clearly marked. This is a wear mark and can clearly be felt as a step.
Cause of my vibration issues?

Blue · Post by **Blue** » Mon Jan 23, 17 7:02 pm

I doubt it, once installed the outer part of the yoke in that area isn't in contact with anything once it has passed through the tailshaft bush.

MilesnMiles · Post by **MilesnMiles** » Mon Jan 23, 17 7:07 pm

Ok Blue, can you clarify for me? Which part of that yoke is in the bushing area?
I thought that the yoke should be smooth with no steps in it.

Blue · Post by **Blue** » Mon Jan 23, 17 7:14 pm

The bush is about 3" long measured from where the seal is, from there on in the outer part of the yoke is out in the open so to speak so if it's not perfectly smooth at that point it makes no odds.

MilesnMiles · Post by **MilesnMiles** » Mon Jan 23, 17 7:44 pm

Ok Blue, thanks for clearing that up. Not sure what's next if the yoke is good
UJs are all goo as is pinion bearing. Looks like I'll have to put up a 'vibration' thread as it has got worse over time.

mustangbooks · Post by **mustangbooks** » Mon Jan 23, 17 8:13 pm

MilesnMiles wrote:Ok Blue, thanks for clearing that up. Not sure what's next if the yoke is good
UJs are all goo as is pinion bearing. Looks like I'll have to put up a 'vibration' thread as it has got worse over time.

But according to those surfin' dudes, the Beach Boys, vibrations are good (or should that be goo?).

Sorry, that was a terrible yoke.

MilesnMiles · Post by **MilesnMiles** » Mon Jan 23, 17 8:45 pm

Bloody awful Andy, have a word with herself

I do have a yoke question..my yoke is 9" from centre of UJ to end of yoke. Most advertised yokes are shorter.
I'm wondering if my propshaft is too short and someone has compensated by fitting a longer, truck style yoke?

Charger · Post by **Charger** » Tue Jan 24, 17 9:15 am

Mine's off the car at the moment, I'll measure tonight, as far as I know it's all original

In your first photo, presuming the shiny section goes in the tail shaft and the black section doesn't, mine looks about the same

ANTON · Post by **ANTON** » Tue Jan 24, 17 9:34 am

Hi Miles

Have you had the propshaft balanced?
Check the prop to see if all the balance weights are still there?
Whats the condition of the UJ's?
Did you mark the position of the prop as to how it came out of the diff? Try it both ways round to see if it make a difference.
Is the prop dead straight with no dents in it?

I have a tailshaft bush if you need one to eliminate that.

MilesnMiles · Post by **MilesnMiles** » Tue Jan 24, 17 9:45 am

Thanks chaps.
OK, prop was new on the car when purchased in 2012. Very minimal vibes at the time. I drove to Shakey and back in one day and didn't feel any vibes in 2013. noticed rhythmic vibes at cruise speeds on trip to Pod 2015. Got worse since despite changing UJs

Will check for weights tonight

UJs are new in last few months

Pinion bearing seems fine

Prop always returned as it came out

Yoke feels correct except for some up/down play and it does have a step in it as described above.

Interested in yoke length as mine is 9" which I cant even find for sale. I need to measure the prop tonight.
According to Denny's website, a overlong yoke as a crutch for a short prop shaft is likely to lead to vibration.

Blue · Post by **Blue** » Tue Jan 24, 17 10:21 am

If you have about 3/4" of shaft exposed from the tail shaft then the prop is the right sort of length.

MilesnMiles · Post by **MilesnMiles** » Tue Jan 24, 17 11:21 am

Thanks Blue, ill offer it back up and check again. looking at the seal mark on the yoke it cant be far of that.

Blue · Post by **Blue** » Tue Jan 24, 17 11:55 am

Yep judging by the photo it looks about right, with such a long yoke a bit more would be ok.

Charger · Post by **Charger** » Tue Jan 24, 17 10:27 pm

my yoke is 8" from centre of UJ to end of yoke

MilesnMiles · Post by **MilesnMiles** » Tue Jan 24, 17 10:32 pm

Thanks for posting. Interesting to see that it looks as if the entire yoke is covered by the tailshaft and seal whilst mine has a section clearly outside of the tailshaft/seal as it's 9"" long.