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Can 3.08 gears work in a 3-series?

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Old 09-05-2001, 03:11 AM
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Can 3.08 gears work in a 3-series?

Is there ANY way to get 3.08 gears to work in a 3-series carrier? Is there a special ring and pinion I can get from somewhere?

Or is this just physically impossible?

I'd like to get the cheaper $99 3-series Torsen LSD carrier from SLP and install 3.08 gears on it. I do a LOT of highway driving (80+ mph), and 3.23 just seems like too much for my needs.

What do you think, is my quest for 3.08 stupid?
Old 09-05-2001, 11:51 AM
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Car: '87 IROCZ
Engine: 395 ZZ4
Transmission: ProBuilt 700R4
Axle/Gears: 9 bolt 3.70s
You might want to check with Richmond Gears. For a 10 bolt rear end, I think that they have gears for the opposite situation that you have (3 series gear ratios on a 2 series carrier). Maybe they can help you.

Under normal conditions, you can not put 3.08 gears on a 3 series carrier.


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'87 L98 TPI IROCZ, AFR190 heads, 3.70 gears, ZZ9 cam, 3000 Art Carr TC, SLP 1 3/4" headers, SLP cat-back, no cat, no AC, no MAF screens, Accel manifold base & SuperRam, 24#/hr SVO injectors, Edelbrock double roller timing chain, MSD ext coil & distributor, trans cooler, 52mm TB with airfoil, TB coolant bypass, AFPR(50psi), K&N filters, Hotchkis lowering springs, my custom chip, Lay Ind. ram air kit, SS Brakes 1LE upgrade 12" rotors dual piston calipers, 265/45R16 Kumho V700 tires.
ET 13.27sec @ 103mph on MT ET Streets
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Old 09-05-2001, 12:03 PM
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No they cannot be made to work. The ring gear would have to have a negative thickness.

The difference between 3.08 and 3.23 is negligible in terms of engine RPMs, gas mileage, etc.; I think they would serve your purpose as well as 3.08s would.

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Old 09-05-2001, 08:37 PM
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Car: 82 camaro SC
Engine: 350
Transmission: 700r4
I agree, the difference in 3.23 would see no difference in mileage. Gear ratio doesn't hurt mileage that much.

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