vibration at 55-35 decel

[hammerstroker]

if it aint one thing its another. anyone had this problem? while going 55mph then letting it coast down it just shakes/rattles like no other and when u get back in it it smooths out. just did a water pump u joints, carrier, changed the diff oil. after my pull in north carolina my stock tranny is now slipping but i wouldnt think it would be the trans shaking the truck. im stuck i might just drive it till she breaks and then i will know what the problem is. just seein if someone else has simular problems.

[belz]

Not sure but u could easily check the u joints on the drive shaft.


Sent from my fone.

[late_99_PSD]

99% probably the u joints

[Dave]

Ujoints Josh.

[cajundave]

does the truck need to be lifted in order to check the driveshaft u joints?
what is the best technique when checkin them?

[late_99_PSD]

The best technique would be to pull the driveshaft out and "feel" each joint manually for sicking/roughness. Its only a few bolts and its out, not very difficult, just mark on the rear and the trans where you took it apart.


What my uncle did was to jack up the end of the truck and put it in gear and have soneone look at the shaft while he recreated the condition when it would vibrate. You could see the thing jumping up and down, pretty cool!