[FlatBlack]

Hello all,

Just picked up a 1998 Formula that I will be prepping for ESP class in SCCA Autocross. It's Blurple, but I don't care too much about my cars look (IMG:http://www.frrax.com/rrforum/style_emoticons/default/smile.gif)

I have some other things to take care of first, but wheels (17x9 or 10+) and suspension should come soon. I plan on Koni yellows and GC coilovers.

(IMG:http://i254.photobucket.com/albums/hh81/flatblack280/CYMERA_20140226_175210.jpg)

(IMG:http://i254.photobucket.com/albums/hh81/flatblack280/CYMERA_20140226_175226.jpg)

This post has been edited by FlatBlack: Feb 27 2014, 10:22 PM

[Smitty2919]

I'm interested in all this differential talk. I need to get on over the winter for next season.

Flatblack, what was your reason for going with the Eaton clutch pack vs Eaton TrueTrac or even the Auburn Race diff with their rebuild program? How is it working out for you?

I'm only running 275 V710's on stock 10 spoke ss wheels and try to autocross as much as possible with the car being a DD. I have horrible RH turn pass rear tire spinning issues and can't power out of turns.

I like the rebuildable clutch pack/spring idea vs Auburn/helical gear design only offering their rebuild program for the first 4 years after initial purchase.

[FlatBlack]

I'm interested in all this differential talk. I need to get on over the winter for next season.

Flatblack, what was your reason for going with the Eaton clutch pack vs Eaton TrueTrac or even the Auburn Race diff with their rebuild program? How is it working out for you?

I'm only running 275 V710's on stock 10 spoke ss wheels and try to autocross as much as possible with the car being a DD. I have horrible RH turn pass rear tire spinning issues and can't power out of turns.

I like the rebuildable clutch pack/spring idea vs Auburn/helical gear design only offering their rebuild program for the first 4 years after initial purchase.

From the last page:

My previous region's ESP group went through most of the diffs, and the Eaton clutch diff is the one that holds up to 315 A6s on all 4 corners. The helicals and Auburn Racer's diff didn't last long. My car came with the "Zexel-Torsen" diff. It didn't work after 120,000 miles.

So I've only had the Eaton clutch type, but 3-4 guys using the same axle came to the conclusion that it worked the best. From what I gather, I'm going to need to rebuild even the Eaton every other year or so, but it seems to hold up the longest on Hoosiers.

No complaints with mine, I actually had the inside rear chirp pulling out of a parking space the other day, so it's still working for sure. It has probably 1000+ miles and 80+ autocross runs on it by now.

[dailydriver]

No complaints with mine, I actually had the inside rear chirp pulling out of a parking space the other day, so it's still working for sure. It has probably 1000+ miles and 80+ autocross runs on it by now.

Are you using any limited slip friction modifier in yours (whether added in via 4 ounce bottle, or already in the gear oil)?

Also what type of gear oil (synthetic or mineral based)?

[FlatBlack]

I noticed you said you were looking to get some Koni coil overs. Would you be interested in a complete set from my 94 Camaro? They are Koni Sports (yellow), they were rebuilt/dynoed in 2013 (only have 30 events on them) Front part number is 8242 1005SP1 and rear part number is 8242 1006SP1. The car is set up for ESP as well and took 1st at Nationals (ladies class) and 8th (mens) in 2010.

I've already got Koni yellows, but thanks for the offer. I was mostly referencing the coilover sleeves/springs, not the shocks.

No complaints with mine, I actually had the inside rear chirp pulling out of a parking space the other day, so it's still working for sure. It has probably 1000+ miles and 80+ autocross runs on it by now.

Are you using any limited slip friction modifier in yours (whether added in via 4 ounce bottle, or already in the gear oil)?

Also what type of gear oil (synthetic or mineral based)?

IIRC the Eaton comes with a paper slip that says not to use LSD friction modifiers? Pretty sure I'm using synthetic gear oil. Honestly I'm not too sure, I've had about a million beers since then.

[dailydriver]

IIRC the Eaton comes with a paper slip that says not to use LSD friction modifiers? Pretty sure I'm using synthetic gear oil. Honestly I'm not too sure, I've had about a million beers since then.

Actually, they tell you to use the friction modifier (even though some who ONLY race the car do not, and live with the carbon clutch pack wear for the sake of better lockup/launch off of apexes), and NOT to use synthetic fluid in their Posi (and Truetracs for that matter) gear oils, even though most do with no ill effects.

Their Posi unit's carbon clutch packs would not last very long in daily street driving without the L.S. friction modifier, sadly. (IMG:http://www.frrax.com/rrforum/style_emoticons/default/sad.gif)