Side Yokes
Thread Starter
Pro
Joined: Jun 2001
Posts: 579
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From: Pflugerville/ Colllege Station TX
Side Yokes
I have recently found that I need to replace my differential side yokes on my '69. I need to know what else should be replaced while Im in there. Also if anyone knows where I can get the best deals on these parts let me know.
Team Owner
Joined: Jul 1999
Posts: 65,492
Likes: 230
From: Orange Park Florida
Re: Side Yokes (Jester69Stingray)
The metal from those yokes went somewhere, for sure,....
check the posi clutches....if mainly silver surface...replace....if mainly black...they probably ok....
probably need carrier bearings, and small pinion bearing...for some crazy reason the main large pinion bearing seems to survive....dunno why...
the cross shaft probably has significant wear ridges on the sides....
of course all the seals...yoke, pinion, seal cover with RTV...
other than that, you may have to reshim the carrier...pattern...
GENE
check the posi clutches....if mainly silver surface...replace....if mainly black...they probably ok....
probably need carrier bearings, and small pinion bearing...for some crazy reason the main large pinion bearing seems to survive....dunno why...
the cross shaft probably has significant wear ridges on the sides....
of course all the seals...yoke, pinion, seal cover with RTV...
other than that, you may have to reshim the carrier...pattern...
GENE
Le Mans Master
Joined: Sep 2000
Posts: 5,635
Likes: 4
From: Orlando Floriduh
Re: Side Yokes (Jester69Stingray)
I got mine from Eckler's. They sell reconditioned yokes that have a pressed in hardened end bottons.. These are better than new because the originals are only flame hardened. I replaced all six U-jounts, Rubber spring cushions, strut rod bushings and differential nose mount cushion. I had no leaks or bearing noises and did not do anything else.. So far so good. :smash:
Le Mans Master
Joined: Nov 1999
Posts: 5,768
Likes: 3
From: San Diego CA
Re: Side Yokes (Jester69Stingray)
I have recently found that I need to replace my differential side yokes on my '69. I need to know what else should be replaced while Im in there. Also if anyone knows where I can get the best deals on these parts let me know.
http://www.bairs.com
Tech Contributor
Joined: Aug 1999
Posts: 15,173
Likes: 3,982
From: Connecticut, USA
Re: Side Yokes (Ingar, Norway)
Ingar how much wear did youhave on the pin? curious to know because I checked a couple of used ones and asked the guys at Tom's to check a new one and they were .748"
Thanks,
Gary
Thanks,
Gary
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Racer
Joined: Apr 2000
Posts: 499
Likes: 0
From: Kristiansand
Re: Side Yokes (Jester69Stingray)
See image. After replacing the pin I had zero lateral yoke movement.
Seems like as soon the pin gets a little wear it stops rotating and the process accelerates. (I have turned the pin just for taking the photo)
As you can see the yokes has dig in so deep in the pin that the splines started to mushroom.
Looks like the yoke tips are hardened, the splines not.
I'm pretty sure the yokes are original. Maybe they are hardened on the new diff (80-82).
[Modified by Ingar, Norway, 6:40 PM 3/20/2002]
Seems like as soon the pin gets a little wear it stops rotating and the process accelerates. (I have turned the pin just for taking the photo)
As you can see the yokes has dig in so deep in the pin that the splines started to mushroom.
Looks like the yoke tips are hardened, the splines not.
I'm pretty sure the yokes are original. Maybe they are hardened on the new diff (80-82).
[Modified by Ingar, Norway, 6:40 PM 3/20/2002]
Melting Slicks
Joined: May 1999
Posts: 2,897
Likes: 0
From: Moon Township PA
Re: Side Yokes (Ingar, Norway)
WHOA! :eek:
That is a huge amount of wear. I would suggest to anyone that is going into their differential to replace side yokes that you also replace the clutch pack and the bearings. You really don't want to take this thing out in a few years to do it again do you?
Gary
That is a huge amount of wear. I would suggest to anyone that is going into their differential to replace side yokes that you also replace the clutch pack and the bearings. You really don't want to take this thing out in a few years to do it again do you?
Gary
Tech Contributor
Joined: Aug 1999
Posts: 15,173
Likes: 3,982
From: Connecticut, USA
Re: Side Yokes (Ingar, Norway)
Yup you have some wear there alright :eek: The shaft itself shouldn't rotate though, it has a screw/pin going through it into the carrier. If the shaft rotated then the screw would be sheared off. I think thats why these carriers oval out the shaft bore under load? I see your yokes are worn right down to the snap rings which I guess would be around .200" worn from the end of the yoke.In that case a full rebuild would be in order.
Gary S- I wouldn't change the clutches unless they're really worn. In my case(55k miles) only .001" on average per clutch, with the pattern still showing. I heard of some guys having problems with some of the new clutches out now. I believe Eaton stopped making them, until Tom's Differentials ordered a lot to stock.So you don't know what type or brand you may get? This is just my opinion of course,I have 2 vettes both down,so make your own judgements. :lol:
Gary
Gary S- I wouldn't change the clutches unless they're really worn. In my case(55k miles) only .001" on average per clutch, with the pattern still showing. I heard of some guys having problems with some of the new clutches out now. I believe Eaton stopped making them, until Tom's Differentials ordered a lot to stock.So you don't know what type or brand you may get? This is just my opinion of course,I have 2 vettes both down,so make your own judgements. :lol:
Gary
Racer
Joined: Apr 2000
Posts: 499
Likes: 0
From: Kristiansand
Re: Side Yokes (gtr1999)
GaryS: That's a good advice!! I didn't do it only to find out later that my posi doesn't hold. (Didn't have any experience at the time I did the diff job and wasn't aware that my posi was shot....)
gtr1999:
From what you say there must be differences between 1980 (image) and earlier diff's. The center pin on mine is designed to rotate, it's only fixed to the carrier by a c-clip at each end.
After the center pin was replaced I had zero play, which to me should mean that the yoke ends had no wear.
The ends must look differently on a earlier diff. The distance to the c-clip was about 4mm (.16")
gtr1999:
From what you say there must be differences between 1980 (image) and earlier diff's. The center pin on mine is designed to rotate, it's only fixed to the carrier by a c-clip at each end.
After the center pin was replaced I had zero play, which to me should mean that the yoke ends had no wear.
The ends must look differently on a earlier diff. The distance to the c-clip was about 4mm (.16")
Burning Brakes
Joined: Feb 2000
Posts: 1,246
Likes: 1
Re: Side Yokes (Ingar, Norway)
You're right on the pin, the 80-82 diffs have pins wich are only held in place by c clips.
If you have uneven tyre pressures or 2 different tyres in the back and you run low or without the posi additive the pin will wear. I also see your pin is all blue wich only happens at temps above 1200 F.
The stock 80-82 yokes have hardened inserts.
Check your tyres and your trailing arm bushings
Xander
If you have uneven tyre pressures or 2 different tyres in the back and you run low or without the posi additive the pin will wear. I also see your pin is all blue wich only happens at temps above 1200 F.
The stock 80-82 yokes have hardened inserts.
Check your tyres and your trailing arm bushings
Xander
Race Director
Joined: Aug 2000
Posts: 18,478
Likes: 3
From: Quincy IL
Re: Side Yokes (V-Twin)
i bought diff rebuild kit from Drivetrain Specialists in Warren, Mich., included everything for rebuild,including new posi clutches for about $190. rebuilt yokes i got from Bairs, $90 apiece, spent $200 on Labor.
Safety Car
Joined: Aug 2000
Posts: 3,711
Likes: 43
From: San Antonio TX
Re: Side Yokes (Jester69Stingray)
You can get the highest-quality (and usually the lowest price) diff parts through Tom's Differentials at http://www.tomsdifferentials.com/INDEX.HTML
They are experts with the Corvette IRS.
They are experts with the Corvette IRS.
