489 Case Crush Sleeve Question

[Vertex_Jeff]

Is there a way to tell if the crush sleeve has been eliminated without taking the pinion out to see what is behind it? I have a couple of 489 cases on the shelf that were new built/ rebuilt for me over the years, but I do not remember if the elimination was done by the builder, and he has passed away. I want to change the yoke size on one of them, but dont really want to open one up and lose the preload setting on the pinion if it still has the crush sleeve.

 

[Dana67Dart]

I want to change the yoke size on one of them

can you use a conversion U joint instead?

 

[71GSSDemon]

Is there a way to tell if the crush sleeve has been eliminated without taking the pinion out to see what is behind it? I have a couple of 489 cases on the shelf that were new built/ rebuilt for me over the years, but I do not remember if the elimination was done by the builder, and he has passed away. I want to change the yoke size on one of them, but dont really want to open one up and lose the preload setting on the pinion if it still has the crush sleeve.

You can mark the nut and count the threads. Put the new yoke on and put it back where it was plus 1/4 turn. If it doesnt go further. Then it has the eliminator

 

[Vertex_Jeff]

can you use a conversion U joint instead?

Yes- but they currently have the 7260, and i was wanting to have a driveshaft built with 1350 ends. Seems silly to do that conversion.

 

[71GSSDemon]

You can mark the nut and count the threads. Put the new yoke on and put it back where it was plus 1/4 turn. If it doesnt go further. Then it has the eliminator

The 1/4 turn will compress the crush sleeve slightly again. Set up should be all good still. Have done it many times.

I just did the 7260 to 1350 like you are

 

[Vertex_Jeff]

The 1/4 turn will compress the crish sleeve slightly again. Set up should be all good still. Have dine it many times

I may try that. I'm just trying to get a car on the road for next year with parts i have laying around..... knowing that it will probably need a Dana 60 in 2 to 3 years of iterative changes. It is a heavy B body wagon with a stout 440. Currently has an 8 3/4 with 7260 joint yokes. I need to have a driveshaft made for it anyway, so i was thinking of having one built with 1350 ends for the future Dana 60. It would need shortened for the 60, but at least it wouldnt be a full build when that time comes.

 

[71GSSDemon]

I may try that. I'm just trying to get a car on the road for next year with parts i have laying around..... knowing that it will probably need a Dana 60 in 2 to 3 years of iterative changes. It is a heavy B body wagon with a stout 440. Currently has an 8 3/4 with 7260 joint yokes. I need to have a driveshaft made for it anyway, so i was thinking of having one built with 1350 ends for the future Dana 60. It would need shortened for the 60, but at least it wouldnt be a full build when that time comes.

I had a driveshaft made by PST. 1350 on both sides. Good for 1200hp and plenty of critical speed. Bonneville carries lots of rpm for a long ways.

 

[Vertex_Jeff]

I had a droveshaft made by PST. 1350 on both sides. Good for 1200hp and plenty of critical speed. Bonneville carries lots of rpm for a long ways.

View attachment 1716480385

That looks NICE!