Drive shaft play

[BS2017]

I have a 2002 Chevy 1500hd 6.0 4l80e I just replaced the output shaft seal and it’s still leaking I was looking at today again the drive line have play moving up and down. What would cause this ? Drive line isn’t in all the way ? 

[BS2017]

Here is a pic 

[newdude]

Worn tailshaft extension bushing or bearing.  Could also be a bad yoke.  

[BS2017]

53 minutes ago, newdude said:

Worn tailshaft extension bushing or bearing.  Could also be a bad yoke.  

Okay thanks for the reply ! Would any of these issues require to open the transmission itself ?

[BS2017]

Just now, BS2017 said:

Okay thanks for the reply ! Would any of these issues require to open the transmission itself ?

This transmission was rebuilt the only that wasn’t touched was the yoke

[newdude]

1 hour ago, BS2017 said:

Okay thanks for the reply ! Would any of these issues require to open the transmission itself ?

 

 

I don't think so?  The rear extension would have to come off.  

 

1 hour ago, BS2017 said:

This transmission was rebuilt the only that wasn’t touched was the yoke

 

I'd like to hope they re-did the rear extension with new parts.  

[dna9656]

Could be the splines are worn, check the "tube" part of the yoke for a groove the seal lip would have created, it happens on the front end of crank shafts; the seal cuts a groove in the end of the crank shaft, the fix is generically called a "speedy sleeve" but a yoke with this issue would just be replaced.

 

Edited August 9, 2023 by dna9656

[BS2017]

On 8/7/2023 at 11:40 PM, dna9656 said:

Could be the splines are worn, check the "tube" part of the yoke for a groove the seal lip would have created, it happens on the front end of crank shafts; the seal cuts a groove in the end of the crank shaft, the fix is generically calls a "speedy sleeve" but a yoke with this issue would just be replaced.

 

The back cap does come off I think it looks super simple I found one already with the bearings I’m not sure about o rings though 

[dna9656]

If there is any doubt about the condition of an O ring replace it; they are cheap and it's good insurance. Take the old O ring to NAPA (NAPA because they have them, other more "retail" auto parts stores don't keep an assortment of O rings and can't match a part, they GOT TO have a part number) and have them match it up. if the O ring comes in a box, fold the box up and keep it with the papers for your truck, that way you'll have the P/N on hand.

[BS2017]

On 8/9/2023 at 11:35 AM, dna9656 said:

If there is any doubt about the condition of an O ring replace it; they are cheap and it's good insurance. Take the old O ring to NAPA (NAPA because they have them, other more "retail" auto parts stores don't keep an assortment of O rings and can't match a part, they GOT TO have a part number) and have them match it up. if the O ring comes in a box, fold the box up and keep it with the papers for your truck, that way you'll have the P/N on hand.

Isn’t this sleeve suppose to be inside the housing ? When I pulled the housing off I didn’t see it in there 

[BS2017]

I am stuck i ordered this dorman 946-023 it seems to be a little bit short