Im driving in heavy wet snow the highway other day and I start to hear a low rumbel. I get off the highway and it goes away. Then I stop to get gas. I put the car in reverse and I hear this bad rumbling sound and shaking when backing up (car is still hot). It goes away when in foward. Now its gone completly. Its not snow around the wheels... Do I need trainy fluid changed?

 

We just had several inches of wet snow earlier this week and I drove wifey's RX (99,AWD with LSD) since the GS does not enjoy such conditions. I occasionally heard some low rumble which sounds similar to your description. Since it wasn't there before, nor has occured since, I concluded it was snow buildup sonewhere, probably in the wheel wells, rubbing on the tires some of the time. (I'll put this over on the GS forum, too, since you posted there.)

 

Im very sure its not snow I rev the engine without moving and heard the rumble.

I just though of somthing might be snow in the engine compartment around the belt. I never checked for that.

 

strange...

when i was driving my RX in the rain one night, i think it was about a month or couple ago, when i stepped on the brakes and came to a complete stop... the car would start to seem to rumble a bit... i thinik the engine was rumbling or something... it was weird, it did it a couple of times... but when i steped on my gas, it stopped... first time it happened to me, didnt' know what was going on but since its gone, i dont seem to see it happening again