Hmm...Very bad I suspect ?

Hey guys , I have recently been having a problem with my camaro .
1992 RS 25th - Auto - 50 Z 16's , Lots of engine mods.

Anywho , the problem is from dead stops and mashing my gas while driving at high speeds. I don't know if it has to due with the engine difference or if it's all in the rear end but heres the problem...

When I take off from a dead stop by stomping my gas to kill me some mustangs , A loud bashing ? kind of noise comes from my rear end. It feels as if the rear end picks up a bit on the shocks or something then goes back down. I burn out either way but always and ONLY when I stomp my gas. Sounds like some one smacks my axle with a 20lb. sledge hammer , I have new U-joints , yadda yadda yadda , and it hasn't caused any noticable damage However , It sounds like crap and drives me crazy !

Anyone else had this problem with their camao ?

Thanks

PS - I had the 305 removed and a 350 4 bolt put in.

http://www.geocities.com/shotos_chaos/21_3.jpg

http://www.geocities.com/shotos_chaos/32_3.jpg

http://www.geocities.com/shotos_chaos/9e_3.jpg

http://www.geocities.com/shotos_chaos/6d_3.jpg

http://www.geocities.com/shotos_chaos/20_3.jpg


Heres the pictures of the car when I had bought it , pretty much boring and plain cept' the custom paint and cowl hood...Boy , has she ever improved since then =D More pics soon ! dumb digi cam is broken..all money going in to car >.< overstock.com !!!!

Heh , anywho , hope to have spare money for a new cam so you guys can see the total make over of the boring RS XD.

beleive it or not, this is a pretty common problem with camaro's. there were atleast 2 people a few months back with the same problem, and i've had it too. i've found that low gear ratio's in the rear end (2:73's etc.) cause this. i dont know if it's a problem with the pinion angle changing under hard acceleration or the cheezy stock controll arms flexing. With a gear ratio like 2:73, your applying alot of torque through a through the driveshaft to a pinion that doesn't want to turn a ring gear with that few teeth. something is going to rotate, being either the wheels or the whole rear end.
oh ya, i also had this problem after changing the engine from a 305 to a 350

check your Torque arm and make sure it is tight. if your pinion seal leaks the oil will get on the bolts and cause them to easily come loose (some of them are installed with the Bolt through the top and the Nut on the bottom, where this happens).

I'll due as suggested guys and check it out. Maybe give everything a turn or two to make sure it's all tight. But if I don't find anything to be lose , I think I will throw some serious heavy duty shocks in the back to keep it stiff in the ass for massive accel.

THanks for prompt replies guys =)

one more thing to check, i had the same situation a while back. i had broken the rear transmission mount. but it didn't look broken so i delt with the problem for a while. later i put a jack on the tail end of the tranny and jacked it up a little, and sure enough half of the mount stayed on the crossmember and half on the tranny. bought myself some polyurethane mounts and everything is fine and dandy.

Trans mount! I bought my 91RS from a guy who had this problem (and told me about it!) He said a shop had told him that the whole rearend/ bushings needed replacing. $1200 for the car, $20 for the trans mount, and I have a great daily driver. Do like storm said, and put a jack on the rear of your trans ( tailhousing) Lift about 2" and youll prob notice the mount separating.
KevinD

92rs25th: Sounds like some one smacks my axle with a 20lb. sledge hammer

sounds like the work of ridge_runner :D

hey hey

20lb is overkill, mine is only like 8

lol, I had to take advantage of that one

haha yea i kno, i figured you would catch that

my moms 92 RS makes the same noise...always thought it was something in the trunk that sli back when u hit the gas

mine done that, my ring gear had two teeth
broke off.

Not quite sure what the ring gear is O.o where would one look to inspect such a thing ? Would I need to remove the spider gear plate to inspect such?

I am also going to try the tranny lift Idea. I like the sounds of new tranny muonts anyways considering what kind of car it is , year and how people possibly have driven it in the past. Eventually looking for a 5 or 6 speed swap with finances. But when it gets light , out to jack my RS up.

Some people were out scoping it at like 2 in the morning as well , my fiance informed me and I ran outside with one of my katana's , needless to say , they no longer found interest in it and decided to run themselves =D

ya, to inspect the ring gear you have to pull off the rear end cover. i doubt that's your problem tho, but if you do decide to inspect it, make sure you can get the filler plug out of the housing before you take the cover off. it takes a 1/2 drive socket end, and they dont usually like to come out. if you cant get the plug out dont bother taking the cover off or you'll have no way to put fluid back in.
when jacking up the tailshaft of the transmission be carefull not to go to high, an inch or so should do it.