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Old Oct 24, 2015 | 02:57 PM
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WREK LS1's Avatar
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Default I Need Gears!

98 Z28 M6 w/stock 3.42. Minimal mods. 140K on the clock. What would you do while you're in there? Bearings, seals, posi service etc? How are you correcting for the gear change with the ECU? I'm going at least 4.10, but I'd like 4.30's or 4.56's. Any trusted local shops in the IE, SGV or OC to do the work? I want someone who will get a perfect pattern to keep the whine to a minimum. Any help appreciated.
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Old Oct 24, 2015 | 05:35 PM
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Originally Posted by WREK LS1
98 Z28 M6 w/stock 3.42. Minimal mods. 140K on the clock. What would you do while you're in there? Bearings, seals, posi service etc? How are you correcting for the gear change with the ECU? I'm going at least 4.10, but I'd like 4.30's or 4.56's. Any trusted local shops in the IE, SGV or OC to do the work? I want someone who will get a perfect pattern to keep the whine to a minimum. Any help appreciated.
4.10's + M6 + sticky tires is a time bomb

But yes, a basic rebuild kit plus gears should let you have some fun for awhile on a stock car. Just don't do any clutch dumps..

I have a guy here in the Anaheim area who rebuilt my moser 9" and it was quiet as a mouse.. Basic rebuild kit with motive gears.. PM me for more info if you want
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Old Oct 24, 2015 | 07:29 PM
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Originally Posted by Burken01
4.10's + M6 + sticky tires is a time bomb

But yes, a basic rebuild kit plus gears should let you have some fun for awhile on a stock car. Just don't do any clutch dumps..

I have a guy here in the Anaheim area who rebuilt my moser 9" and it was quiet as a mouse.. Basic rebuild kit with motive gears.. PM me for more info if you want

PM sent. I don't plan on making any passes with it, so just cruising with the Nitto 555's. I'm thinking the gears, rebuild kit, install and a mail order tune to correct the speedo is going to put me well North of $1k. I had 4.10's in my 96 TA and it's hard to ignore the SOP feel of the steeper gears on the street.
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Old Nov 3, 2015 | 12:33 PM
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Isn't anything over 4.10's on a M6 overkill? specially with the stock tranny? Interesting build and curious to see if the top end is massive in the sense of RPM'S at 70+mph.
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Old Nov 11, 2015 | 08:49 AM
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J&S Gear Co.
Differential Sales & Service
18222 Gothard St., Unit A
Huntington Beach, C 92648
(714) 841-4545

I just had John, the owner, install a rear main seal, do both U joints on my '87 turbo Buick. A friend of mine had his gears on his '87 GN done there.
Great work & price for me.
He's definitely worth a call.
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Old Nov 12, 2015 | 06:17 AM
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Originally Posted by Gary Wells
J&S Gear Co.
Differential Sales & Service
18222 Gothard St., Unit A
Huntington Beach, C 92648
(714) 841-4545

I just had John, the owner, install a rear main seal, do both U joints on my '87 turbo Buick. A friend of mine had his gears on his '87 GN done there.
Great work & price for me.
He's definitely worth a call.
Might have to give them a try too. I've been searching for a while to get the rear main seal on my TTA done, but every place I take it to say they can't do it.
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Old Nov 12, 2015 | 07:59 AM
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I can't say what J&S charged me, but it was $100.00 lower than a shop in my area.
John had the seal for my turbo Buick in stock and probably generally does.
Did the other shops say why they can't do it?
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Old Nov 13, 2015 | 06:34 AM
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Originally Posted by Gary Wells
I can't say what J&S charged me, but it was $100.00 lower than a shop in my area.
John had the seal for my turbo Buick in stock and probably generally does.
Did the other shops say why they can't do it?
I had one shop tell me that they wont work on Turbo buicks and others say that they can't guarantee the work since it is a rope type seal. They told me that even after replacing the seal that it could still leak.
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Old Nov 13, 2015 | 08:11 AM
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Originally Posted by nhra-trans-am
I had one shop tell me that they wont work on Turbo buicks and others say that they can't guarantee the work since it is a rope type seal. They told me that even after replacing the seal that it could still leak.

That's ons shop that I wouldn't even let them look at my turbo Buick.
I've owned 5 turbo Buicks since I got into them in about '93 or so. Rope seals went out with high buckle shoes. I'm very doubtful that the rope seal is still available. Although not exactly a speeding bullet, my Buick runs 12.7 with just a few bolt-ons. And above, we're talking rear driveshaft (pumpkin) seal and not the rear main seal. Neoprene seals are generally the way to go.
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