Transmission clunck shifting into drive

Maybe when warm the engine RPM is lower which changes noise?

@Joseph Garcia I would say that it is transmission related. First thing in the morning my Tahoe shifts a little harsh, when it warms up it becomes more gentle.

Dustin Jackson said:

@Joseph Garcia I would say that it is transmission related. First thing in the morning my Tahoe shifts a little harsh, when it warms up it becomes more gentle.

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That would be my thought, as well.

Joseph Garcia said:

I will repeat what @OR VietVet said. All of the suggestions given so far do not explain the fact that the OP says that the clunk goes away after the motor is warmed up.

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I thought of that too, but I recalled that the Chevy clunk can vary as the parts warm up in operation. Any residual grease on the splines will mobilize, thermal expansion can loosen the fit between the parts just enough. I wouldn't expect that to happen with a 4wd because the transfer case runs relatively cool, but in a 2WD, the transmission output shaft will warm up a bit.

sctrl said:

Hi all. Recently I started noticing a loud metal clunk when shifting into D or R from Park on cold. I recorded a video of this. Also, there’s a long delay between shifts when cold. The video shows shifting from P to R to D to R to D and to P again. When tranny is warm, shifts are faster and clunking noise is not noticeable.
What do y'all think, alarming?

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Have you had any rear differential work done lately?

Worn spider gears in the axle?