New NV 4500 with South Bend DD, full package with 1-3/8th input. ( 4th gear vibration on deceleration) trouble

[Mopar1973Man]

13 hours ago, Scottyv said:

also when grabbing onto the shifter in prep to shift from third, it will come out of gear upon deceleration

 

Bearing failure. The mainshaft to moving forward and backwards enough to pop the shift ring out of gear.

[Scottyv]

2 hours ago, Mopar1973Man said:

 

Bearing failure. The main-shaft to moving forward and backwards enough to pop the shift ring out of gear.

 

Which bring the question, whats causing it? and would they have rebuilt it with a old or bad bearing? hmmmmm...

I know they will reuse parts that fall into spec, but I really think the bearings should have been new.

[Mopar1973Man]

That is the only reason it will kick out of gear is the main shaft is moving fore and aft as you decelerate. 

 

During all my transmission work I ask for all the old parts during the rebuild. This way I can account for what work was done and see possibly the damaged parts.

 

When I broke the mainshaft I had the same problem of kicking out of gear. Mainshaft was moving. When I ate 5th gear it worked fine. Shaft was solid not moving.

Edited October 22, 2019 by Mopar1973Man

[Scottyv]

32 minutes ago, Mopar1973Man said:

That is the only reason it will kick out of gear is the main shaft is moving fore and aft as you decelerate. 

 

During all my transmission work I ask for all the old parts during the rebuild. This way I can account for what work was done and see possibly the damaged parts.

 

When I broke the main-shaft I had the same problem of kicking out of gear. Main-shaft was moving. When I ate 5th gear it worked fine. Shaft was solid not moving.

 

Which bearing is it?

 

[Mopar1973Man]

Both on the main shaft. Both are wore out hence why the mainshaft moves and kicks out of gear.

[Scottyv]

28 minutes ago, Mopar1973Man said:

Both on the main shaft. Both are wore out hence why the main-shaft moves and kicks out of gear.

this was helpful, it for the Chrysler  A-833 but its the point that counts.

Here's the full link. 

 

https://books.google.com/books?id=ZwJbDwAAQBAJ&pg=PA19&lpg=PA19&dq=main-shaft+to+moving+forward+and+backwards+enough+to+pop+the+shift+ring+out+of+gear&source=bl&ots=j85QltodQE&sig=ACfU3U37_3qvlbnTPQv6QyrWpi0uvZr2xw&hl=en&sa=X&ved=2ahUKEwicg5qMl7DlAhVBIqwKHcxjAWYQ6AEwAHoECAkQAQ#v=onepage&q=main-shaft to moving forward and backwards enough to pop the shift ring out of gear&f=false