Unusual discover in drive shaft

[Qzip]

Was greasing up the shaft, until I saw this sponge like thing inside the drive shaft…..no way this is from factory is it ? If it is can some one please school me on the reason why theirs a sponge inside the drive shaft tube?

 

[2021EcoDiesel]

Probably to reduce noise or vibration.

 

[PatriotLonghorn]

With the driveshaft being aluminum, I'm guessing it's also for vibration reduction.

 

[kapinallinen2]

Was greasing up the shaft, until I saw this sponge like thing inside the drive shaft…..no way this is from factory is it ? If it is can some one please school me on the reason why theirs a sponge inside the drive shaft tube? View attachment 191960

Looks like protective shipping foam that got left in the shaft from the assembly line. It is too light to have any vibration damping properties IMO.

 

[Qzip]

I ended up just leaving it in there.

maybe it is used to reduce vibration like the fellas above stated.

 

[1923bob]

Was greasing up the shaft, until I saw this sponge like thing inside the drive shaft…..no way this is from factory is it ? If it is can some one please school me on the reason why theirs a sponge inside the drive shaft tube? View attachment 191960

Strange.

 

[Oda112]

Was greasing up the shaft, until I saw this sponge like thing inside the drive shaft…..no way this is from factory is it ? If it is can some one please school me on the reason why theirs a sponge inside the drive shaft tube? View attachment 191960

I have the rear end clunk at low speed when stopping/getting off the line and I think I might need to do this too. How do you go about those boot clamps? They look like one time use.
I've never taken one of these out on a DT body style, what's the procedure like?