Heinous vibration after replacing transmission and axles

So long story short.. broke my tranny, replaced it with a used one, accidentally pierced the upper oil pan by mixing the screws of the bell housing (I know...), towed to garage where they replaced it and had them replace the axles at same time (they didnt do rebuilds). Now truck has a constant annoying vibration coming through steering wheel and pedal.

I feel it at all speeds and if I put my trans in say neutral and rev up/down vibration stays same. Seems consistent in turns, acceleration, 2wd/4wd etc...

I marked my drive shaft when I took it off so I am pretty sure (99%) that its back in same place.

Took it back to garage, they thought left wheel bearing, replaced it but didnt change.

I have heard some after market axles can cause issues and I still have old ones I could try to rebuild (maybe- the boots were cracked and they said one made a bit of a click).

What would you suggest? How can I check if its the drive shaft or something else?

 

Off the top of my head I’d say check your motor mounts to make sure they survived the tranny swap.

 

Did you have your driveshaft apart? If so are the 2 halves phased correctly?

 

This!

 

Late reply… was getting work done on it. So mounts look fine though i did forget to readd the 4 small bolts that stabilize the rear mount. It helped but vibe still partly there. I did not take the two halves apart but I could not find the mark i may or may not have put on rear diff and just switched it around without a difference. Had a garage look at it and they said rear of shaft near diff does shake a bit. Not sure if it did before and not sure how it would happen during a swap. Still searching. Only when driving, turning or 4wd makes no diff

 

Might you have thrown a rim weight?

 

well whatever happened happened during tranny and axle swap. No vibe before that . I wished i had done axles later to rule that out but since tightening the mount helped i lean towards something around the shaft . I do notice some play around bearing in middle but i assume normal since i got bearing replaced 10-15k ago

 

Could you pull out the shaft and drive it in front wheel drive? That might tell you if the shaft was the cause or not.

 

Is that safe on the truck to do that? I didn’t know one could

 

I’ve never done it, but others certainly have.

 

Yes it is perfectly fine to do it.

 

Yes its fine

if you are feeling it in your steering wheel, then it has to do with your front suspension or wheels.

Try this:
Sit in your driver seat, shoulders back, normal driving position. Place your hands at 10 and 2 (like on a clock), and go for a drive. No radio. If you are feeling the vibration in your steering wheel, then its related to the front of your truck. If you feel it in your butt, then its related to the rear.

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