Ron454
Jan 3rd, 05, 10:07 PM
Hi folks,
Have chatted a little with Bill (engineguy) about the problems I have had with my 12 bolt. He suggested that the setup was not good. It was my setup, and my first at that.
Here is the problem.
After around 200 passes, the gears 4.10's, began to make niose, and were wearing out. These were Richmond street gears. I had them professionally setup.
After spending countless $$$ over my career having rear ends setup, I decided to finally do the next setup myself.
Bought the gears, read up on what was involved and went about the process.
I don't have a pinion depth setting tool, so I attempted to just get the pattern correct.
Everything I've read says to start with the pinion shim already in the rear. Which I did, and the pattern was wrong. So I began changing the pinion shim in .002" increments all the way from too deep to too shallow. I wanted to see the effects. When I arrived at what looked to me to be the right pattern, I could not get the coast pattern to be correct.
But I went ahead and finished everything up.
I set the back lash at .008 to .010".
I followed Richmonds break in proceedure, and all was well. No noise. Changed the lube (synthetic) and went racing.
Within 5 passes the rear was making noise on decelleration. *****!
Ever since then, the same story. Except it's quiet until it gets hot.
So I called Richmond and explained what was going on. Of course they have no way of knowing what my pattern looked like. But the guy tells me that at 11.0 in a 3500lb car, I'm bending the gear teeth because I've exceeded the limits of the street gears. And I can't run a pro gear, cause I drive the car to the track. He says "we have a lot of gear sets out there making noise, but they live just fine".
Hmmmmm.
I'm now puzzled.
I probably need to change back to a 3.73 ratio with my new engine, and don't want to goof this up again. (I assume I did something wrong)
Suggestions?
Try a different gear company? US Gear maybe? Go back to paying $175 to have this done? (Drives me nuts cause it aint all that hard)
Ron
Have chatted a little with Bill (engineguy) about the problems I have had with my 12 bolt. He suggested that the setup was not good. It was my setup, and my first at that.
Here is the problem.
After around 200 passes, the gears 4.10's, began to make niose, and were wearing out. These were Richmond street gears. I had them professionally setup.
After spending countless $$$ over my career having rear ends setup, I decided to finally do the next setup myself.
Bought the gears, read up on what was involved and went about the process.
I don't have a pinion depth setting tool, so I attempted to just get the pattern correct.
Everything I've read says to start with the pinion shim already in the rear. Which I did, and the pattern was wrong. So I began changing the pinion shim in .002" increments all the way from too deep to too shallow. I wanted to see the effects. When I arrived at what looked to me to be the right pattern, I could not get the coast pattern to be correct.
But I went ahead and finished everything up.
I set the back lash at .008 to .010".
I followed Richmonds break in proceedure, and all was well. No noise. Changed the lube (synthetic) and went racing.
Within 5 passes the rear was making noise on decelleration. *****!
Ever since then, the same story. Except it's quiet until it gets hot.
So I called Richmond and explained what was going on. Of course they have no way of knowing what my pattern looked like. But the guy tells me that at 11.0 in a 3500lb car, I'm bending the gear teeth because I've exceeded the limits of the street gears. And I can't run a pro gear, cause I drive the car to the track. He says "we have a lot of gear sets out there making noise, but they live just fine".
Hmmmmm.
I'm now puzzled.
I probably need to change back to a 3.73 ratio with my new engine, and don't want to goof this up again. (I assume I did something wrong)
Suggestions?
Try a different gear company? US Gear maybe? Go back to paying $175 to have this done? (Drives me nuts cause it aint all that hard)
Ron