sounds really weird..
It feels like then engine cycles are triggered and fades down quickly in the beginning of replay. Why it does that. I havn't got a clue.
I think one of the transmission gear sounds are pitch down a couple of octaves as well.
I do remember having this problem during development, but that had to do with the clutch values I got from the physics.

But you clearly hear the the pitch is wrong on the transmission.

I don't even remember if there may be options for replay volumes.
What you can try is to change the audio settings when replay start, just to see if that fixes anything.

still, feels like the engine sound is spooking around here.

sorry I can't do more.