micro polished 3.90 gears
Thread Starter
Le Mans Master
Joined: Mar 2002
Posts: 6,885
Likes: 2
From: Corpus Christi TX
micro polished 3.90 gears
anyone else tried this yet on ring and pinion? I just had a set put in about 5 days ago and I'm going out on a limb thinking this is a GOOD thing. I got talked into the process by the shop that installed the gears (Fastech in Balch Springs, Tx). The gear prep was done by Performance Metal. I believe the polishing takes out any chance of impurities and creates an extremely smooth surface. The ring and pinion themselves look like fine silver.
The car has absolutely ZERO slop on the exchanges. No noise. If you closed your eyes and didn't know there was a clutch or shifter, you'd swear it was an caddy automatic shifting. I'm GIDDY. With all of the h/c and exhaust sideshows going on with my car - it's nice to grab back a small slice of civilization. If my T56 ever goes - I'm definitely rebuilding with micro polished internals.
Thanks again to Bob and Sean at Fastech. Excellent job. It was well worth the wait.
The car has absolutely ZERO slop on the exchanges. No noise. If you closed your eyes and didn't know there was a clutch or shifter, you'd swear it was an caddy automatic shifting. I'm GIDDY. With all of the h/c and exhaust sideshows going on with my car - it's nice to grab back a small slice of civilization. If my T56 ever goes - I'm definitely rebuilding with micro polished internals.
Thanks again to Bob and Sean at Fastech. Excellent job. It was well worth the wait.
4th Gear
Joined: Jun 2005
Posts: 4
Likes: 0
From: Sulphur Springs IN
Thanks for the compliments. You can check out my website at
www.performancemetal.net
I have a lot of before and after pictures on my site. I've actually been doing a lot of transmissions for Rodney at RPM Transmissions (crashed94).
www.performancemetal.net
I have a lot of before and after pictures on my site. I've actually been doing a lot of transmissions for Rodney at RPM Transmissions (crashed94).
Pro
Joined: Apr 2003
Posts: 623
Likes: 0
From: dallas texas
Originally Posted by BLU-BY-U
anyone else tried this yet on ring and pinion? I just had a set put in about 5 days ago and I'm going out on a limb thinking this is a GOOD thing. I got talked into the process by the shop that installed the gears (Fastech in Balch Springs, Tx). The gear prep was done by Performance Metal. I believe the polishing takes out any chance of impurities and creates an extremely smooth surface. The ring and pinion themselves look like fine silver.
The car has absolutely ZERO slop on the exchanges. No noise. If you closed your eyes and didn't know there was a clutch or shifter, you'd swear it was an caddy automatic shifting. I'm GIDDY. With all of the h/c and exhaust sideshows going on with my car - it's nice to grab back a small slice of civilization. If my T56 ever goes - I'm definitely rebuilding with micro polished internals.
Thanks again to Bob and Sean at Fastech. Excellent job. It was well worth the wait.
The car has absolutely ZERO slop on the exchanges. No noise. If you closed your eyes and didn't know there was a clutch or shifter, you'd swear it was an caddy automatic shifting. I'm GIDDY. With all of the h/c and exhaust sideshows going on with my car - it's nice to grab back a small slice of civilization. If my T56 ever goes - I'm definitely rebuilding with micro polished internals.
Thanks again to Bob and Sean at Fastech. Excellent job. It was well worth the wait.
My speed density tune is kickin azz...Sean, you Da Man!
Wash
Collections Hold
Joined: Aug 2002
Posts: 2,899
Likes: 6
From: Fort Wayne Indiana
Our gear sets in the Stage III differentials are always micro-polished. The process is very effective and racers have been doing it for many years, it's just now trickeling down to the street folks that same way cryogenics did from the aerospace industry...
Advanced
Joined: Aug 2004
Posts: 97
Likes: 0
From: midland tx
We have been doing this to are shifter kart trannies for years.Knight and day difference. When I purchsed my diff from DYNOTECH this was an option I defintly wanted. All I can tell you is that it quieter than the original diff.
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Melting Slicks
Joined: Dec 2003
Posts: 3,315
Likes: 17
From: Near Jacksonville Fl.
This process has been around for years and is more commonly known as "vibratory tumble finishing, AKA Isotropic finishing".
It's main purpose is to eliminate the break in period of sliding parts such as gears.
It has very little value for noise reduction or the strengthening of the parent material.
It will remove small stress risers that could result in sudden impact failure, but then so will micro shotpeening. Which also had the advantage of leaving a harder compressive layer on the surface of the gear along with small pockets for oil retention.
It will make you lighter though! LOL
It's main purpose is to eliminate the break in period of sliding parts such as gears.
It has very little value for noise reduction or the strengthening of the parent material.
It will remove small stress risers that could result in sudden impact failure, but then so will micro shotpeening. Which also had the advantage of leaving a harder compressive layer on the surface of the gear along with small pockets for oil retention.
It will make you lighter though! LOL
Racer
Joined: Oct 2005
Posts: 351
Likes: 0
From: Haw River North Carolina
Originally Posted by performancemetal
Typically the process only removes about a tenth of a thousandth (.0001). It all depends on the hardness of the material.
Intermediate
Joined: Oct 2005
Posts: 26
Likes: 0
I have a 390 with cryoed and polished gears. The reduced friction reduced temp and improved the parasitic hp loss. This is very common in the racing industry. If you really want a thrill, try this with your tranny, but open up that pocketbook! 
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