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Old 10-22-2018, 01:12 PM
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For those wondering about the marks on the gear surface, that's just where the coating has come off during the gear lapping process, as we need to do that to match the ring & pinion together.
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Old 12-06-2018, 12:54 PM
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Hey all,

Not sure where everyone else is at with their gear swaps..but I've put mine off since I got them in October so I could do this:




I am beyond excited, this weekend it might be installed under the car!
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Old 12-06-2018, 01:07 PM
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REM?

Prefer WPC over REM (due to tolerances), but still does the job
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Old 12-06-2018, 02:53 PM
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Originally Posted by MFMike View Post
REM?

Prefer WPC over REM (due to tolerances), but still does the job
Yes, REM. Wonder how much material it removes?
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Old 12-06-2018, 02:55 PM
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On a new set of gears, it's acceptable, but on used/2nd hand gears, it removed too much material that we couldn't use the gears any longer :(

WPC doesn't remove any material
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Old 12-06-2018, 03:17 PM
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Will certainly take your word for it as you guys are in the business of making gears. The shop I have doing this work specializes in moto gp style race bikes. They do this process where ever they can inside the engine from transmission gears to valvetrain parts and see very noticeable power gains. This is, also, race bikes which are not expected to last 100,000 miles. Good thing your R+P is brand new, hope the torsen bits are not ill affected! I will certainly ask them why they do REM over WPC when I see them later this week. Thanks for that bit of knowledge

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Old 12-06-2018, 09:35 PM
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Mike,

I am about to build a rear end with your gears. Would I realize any performance benefits from having them treated?
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Old 12-06-2018, 11:42 PM
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When we do the surface treatments, it's not increase in performance/power that we generally care about, but rather, the decrease in NVH and increase in longevity (due to the decrease in friction)
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Old 12-06-2018, 11:49 PM
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For me, performance goes beyond power. Thermal/reliability/NVH all qualify.

is it worth it?
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Old 12-06-2018, 11:53 PM
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WPC for us, most definitely

We use it on all of our own & sponsored engine/transmission builds
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Old 12-06-2018, 11:53 PM
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Great, thanks. I will get quotes.
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Old 12-09-2018, 02:02 PM
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All done and I love it! It whines a fair amount around 50mph but didn't notice it at slower and didn't seem to be present doing 75. Only did a dozen or so miles so rar. The torsen works perfect even with the gears REM treated.

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Old 12-09-2018, 08:47 PM
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Originally Posted by matthewdesigns View Post
Unfortunately a direct swap is not going to be possible from one platform to another. Pic shows 4 out of the 5 AZ6 transmission output shafts (missing: IS200) used in the last 20-ish years. Note the difference between them, which also have an integrated 3rd and 4th gear. Some industrious individual may be able to work out how to make a Frankenmission out of these units, and if we have time to play around with it we'll do it since we have all of the parts on hand, but it may not be a priority.

We are still 2-3 months out on receipt of the prototype set from PPG, and once we get it we are going to try to break it. When we figure out what it can handle, and what final cost will be, we'll see if there's a big enough call for it to cross over to other platforms and work towards that if so.
Did you get any further with the idea of putting together an AZ6 frankenmission? I'm thinking about traveling down this path myself.
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Old 12-10-2018, 08:19 PM
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Wow they rem'ed the **** out of those things. We rem some stuff at work and never go that extreme, though we also DLC right after rem which I think requires some sort of glass beading after the rem for adhesion, but we never have edges blown over that much.
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Old 01-17-2019, 10:08 PM
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Hey all, for those of you who ordered this setup for a road going car, I have a fix for you!

Your speedo is going to be way off. Not sure how it applies to 5mt as I'm running MSM 6mt. Atkins rotary can set you up with an RX-7 (79-93) speed sensor housing and the keyway, and oil seal to run either a 19 or 20 tooth speedo gear. Hooked mine up tonight and the readings against GPS were near perfect.
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Old 01-17-2019, 10:58 PM
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Originally Posted by reip View Post
Hey all, for those of you who ordered this setup for a road going car, I have a fix for you!

Your speedo is going to be way off. Not sure how it applies to 5mt as I'm running MSM 6mt. Atkins rotary can set you up with an RX-7 (79-93) speed sensor housing and the keyway, and oil seal to run either a 19 or 20 tooth speedo gear. Hooked mine up tonight and the readings against GPS were near perfect.
got part #s by any chance?
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Old 01-18-2019, 06:20 AM
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Originally Posted by Ted75zcar View Post
got part #s by any chance?

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Old 01-18-2019, 06:35 AM
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And for the gear:

M503-17-441 (20 tooth speego gear) will give you the correct cluster readout to with 0.5% with 195/50R15 or 215/45R15 rear tires. If you want to run 225/50R15 tires you need the 19 tooth gear (M502-17-441).
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Old 01-22-2019, 11:33 PM
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Originally Posted by reip View Post
All done and I love it! It whines a fair amount around 50mph but didn't notice it at slower and didn't seem to be present doing 75. Only did a dozen or so miles so rar. The torsen works perfect even with the gears REM treated.
Out of curiosity, did you set the gears up or did you have someone do it for you?
I'm curious if you needed to get new pinion shims or were the gears close enough for the factory pinion shim.

If you had someone set it up for you, who did it and what did they charge? I'm looking for a decent shop and you're only a couple hours away from me.
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Old 01-23-2019, 01:52 PM
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Also thinking about picking up a set of these. Is there still a fair number left?

How many people have run them this season? Any issues or comments?

(I have seen about the minor whine; Not a major major issue as mine is a streetible track car with poly diff bushings/awd engine mounts and a 3" exhaust that just beats track limits.)
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