Hello,

I have a 1994 Firebird 3.4L V6 and ive got some questions.

When i start my car and its on idol, its fine, but when i put it in Drive, or reverse, there is a weird rumbling sound, my RPM's are fine. but its kinda groggy. its fine when i hit the gas though.

And then i turn on my A/C and it gets this worse, and theres a clicking noise. any information?

Thanks

Timmy

Have you checked your fluids? Tranny fluid, oil (not even sure why, but check it)... Also note condition of your transmission fluid.

... As far as the AC thing ... you compressor could be on it's way out. It'll pull a lot of power from the car if that's the case.

__________________
"That girl will rain destruction down on you and your crew,
the likes of which you have not seen." - Operative, Firefly

I bought it used, it has 157,000 miles on it, but it runs really smooth.

I just changed my oil, i used 10W-40 but someone told me to use 20W-50. I added some tranny fluid a few days ago, because it was it was a little low.

It only makes the noise when im in either reverse or drive and at idol. When im in neutral or park its okay.

wonder if your driveshaft is rubbing on something..... There is a "cross brace" that GM puts under the driveshaft - it's a thin piece off sheet metal that can some times warp and come in contact with the driveshaft. It's four bolts to remove and everything's fine after that.

__________________
"That girl will rain destruction down on you and your crew,
the likes of which you have not seen." - Operative, Firefly

Hm, ill have to check into that tomorrow. is that the metal exposed under the front bumper?

no, it's directly under the driveshaft, behind the transmission - looks rather useless... and I think it pretty much is. lol

Wow - here's an old picture! ... but it shows the suport. -- your exhaust can hit it, your driveshaft can hit it... and it's just a little bit of weight reduction.

__________________
"That girl will rain destruction down on you and your crew,
the likes of which you have not seen." - Operative, Firefly

Doubt it is rubbing the cross brace at all. If it is in drive and reverse only, you may need to just flush the tranny fluid and replace the tranny fluid filter. Or, the valve body is sticking slightly. Also, if you turn your A/C on and it hesitates a lot more than normal, it is because your a/c compressor is crapping out and drawing even more power to turn the accesories drive. Look into a used or remanufactored one, it is cheaper. Change out the plugs and plug wires on that thing mainly because of the mileage. Also change out the fuel filter and air filter as well.

__________________
2001 Z/28 6speed. TSP 231/237 598/595 112 cam, PRC .660 lift valve springs, titanium retainers, TSP 7.4 hardened push rods, Lid w/ Amsoil filter, Longtube headers, TSP true duels, richmond 4.10 gears, SLP maf, LS2 timing chain and gear set, Clevite rod and main bearings, ARP rod bolts, Power bond 25% UD pulley, Custom tune by RPM performance, BMR subframes, BMR LCA's, Edelbrock TQ arm, BMR panhard bar,315/35/17 MT ET streets on black ZR1's... 395 rwhp 381 rwtq

Alright, well i changed the air filter the other day when changed the oil. Ill change the plugs and the fuel and tranny filter soon, and see how that works.

i listened to it on the way to school this morning, its more of a rumbling sound, sounds like the tranny.

Wish I could actually hear the noise... I've never heard of a transmission "rumbling" ... grinding, grating, squealing.... not really rumbling.

But just make sure you tell us what it is when you find out.

__________________
"That girl will rain destruction down on you and your crew,
the likes of which you have not seen." - Operative, Firefly

Definatly will do. Hopefully i find out soon. that noise gets on my nerves.