Clunk when starting

[pdxrealtor]

So- I've got this clunk upon start up. Almost positive it's coming from the transfer case.

It only occurs after it's sat for the night.

I'm pretty sure it's only happening when parked nose facing downhill incline. (still working on verifying this)

It only started happening after I did the TC fluid change.

The truck was level when I did the fluid change. I used Redline DT4.

Does it need more fluid maybe? I went through the recommended amount and it did come out of the fill hole while filling up.

[pdxrealtor]

Anyone with any ideas suggestions or info?

[pdxrealtor]

Hmmm.. No one? Did it again today and It never did this before the fluid changes.

It sounds like gears that aren't quite meshed up 'clunking' into sync

[glennf1]

Don't know what the problem is but on your next fluid change put in the better Dexron VI or equiv., either Redline's D6 or others.

[[__--MUD--__]]

There is nothing thats turning in the transfercase when you start the motor. And your not switching between any functions of the transfercase.

When are you hearing this noise? as the engine is rolling over, after it fires, after it starts and you take it out of park?

Someone else over the last 3 months was talking about a clunking noise. They were nose down in the ditch at the end of their driveway, or their driveway had a drop off at the end. Did you make any other posts about this? It was either here or the hammerforums. If you didn't, I'll see if I can find that thread.

[pdxrealtor]

This is the only thread I started here. Slim chance I posted the same on the other forum.

This noise is heard the second the key is turned to engage the starter, but I swear it's coming from under the truck.... So yes, as the engine is rolling over.

It sounds similar to the tranny going from park to reverse.....you know ... That clunk sorta sound the tranny makes when at a stand still and running it through all the gears via the hand shifter.