Don't think this author wants to not fix what's wrong and sell it.T/C or rear end gears he needs to take care not to get to valve float so he doesn't damage the engine.I suggest that is the important factor here.Need more info to help from him.

 

i was trying to get more info out of him but he has failed to respond. i wasnt suggesting that he just leave it alone and get rid of it.

 

i know nothing about rear ends and nothing about what they have done to it im blind

please if you have advise about how to find out these things please let me know

its not that fast off the line but has some power needs a tune up but dont misfire it goes through all gears and its a 4 speed im pretty sure

 

Now here you said something interesting.Tune-up??.Look at the plug wires and cap in the dark with the air cleaner off so you can see easily.If you see any arching at all replace with delco parts only across the board.That would be plugs,wires,cap,rotor.Pull the cap off and look for arching that would look like pencil marks inside the cap.

 

Something is up with the trans or rear-end. 5500RPMs at 75 is outrageous. The best way to find your rearend ratio, jack it up, put it in neutral, and turn the driveshaft, see how many turns it takes to turn the tire 1 full rotation, that will be your gear ratio. EX: 3.73 turns of driveshaft. and 1 full turn on the tire= 3.73s.

But I think your trans is the prob, maybe slipping. Whether you need a tune-up or not is irrelevent when your turning 5500RPMs at 75. My ol' F-250 would churn 3800RPM at 55mph and thats a lot on a v8, but I've never seen a car geared as low as that thing.

 

5500@75mph??.That too is interesting.Tire rotations is a tough way of gear ratios.The tire diameter does come into play.Could it be a number of factors at the same time??.

Here are some formulas to try to work into you issue.

http://www.wallaceracing.com/Calculators.htm

 

Hi 91camaro350,

Welcome to the Chevy Forums.

There IS something wrong here. As an example, at a paltry 3500RPM, my 3 1/2 ton truck,with a 364 engine is roaring along at over 85 MPH with 410 gears. Which means that EITHER some hammer of an owner prior to you saw fit to install INSANE differential cogs(like 583s) in your car, OR you have a major bug in the system.

Did you acquire the vehicle like this, or did it just start malfunctioning in this manner?

Information is crucial here. Critical information you need to find out/provide would be :

Are you the original owner, or did you buy the car used?

What is the mileage?

What is your maintenance paradigm?

What type of transmission?(specific type, like "THM350" as opposed to "automatic")

What's the RPO for the differential? Any possibility it's been changed? What is the actual gear ratio?

Is the engine/drivetrain original or has it been changed? A giveaway to outrageous gears is large "slicks" on the rear. What type of tires are you using? Highway radials? Standard rims?

I can't help feeling that the closer you get to providing us with these answers, the more likely your problem will either be solved or become obvious...

 

Well Put ,i will answer every question listed if i can

i will give u everything i know

i traded my 600 Suzuki a punk kid came up to me at a light and asked me how much for my bike told him 3000 lol just to see didnt wanna sell it but we met up again and he said would you trade me car for bike i said i dont know and drove it and fell in love with it ,
i feel like i stole it i have pics and videos of it on photobucket.com, look for 91camaro350 so not original owner

1991 Camaro RS 87000 miles

dont know what tranny is in
need help on how to find out
same for rear end im in the dark
how could i tell you what i have

i have firehawk indy 500 tires with aftermarket rims

dash cluster is not right the tack reads high the speedo is broke

EGR is bad -did vaccum test didnt hold pressure !"should i block off the egr valve or just get a new one

enigine light comes on everyonce in awhile and it dont feel like i am on all 8 cyls. till i shut it off and turn it back on to reset it never check for codes when it came on cause was in traffic and it ran rough
i really think thats all i know about the car i feel like theres is a bug in my system

and i havent did anything to it but oil changes

 

First, replace the EGR valve and gasket. This is going to cause you a world of hurt both in and out of performance issues, until you get it fixed.

Second, what type of transmission? Is it an automatic? Manual? A four speed with a broken synchromesh in fourth gear would only shift to third, which would explain the high revs at 75MPH.

What are the tire SIZES? I tried repeatedly to access your photobucket, with no success.

 

http://s868.photobucket.com/home/1991camaro350 putting more pics and videos later tonight or tomorrow