C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Recommended rear end gearing?

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Old May 23, 2003 | 08:21 PM
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Default Recommended rear end gearing?

Just recently bought my first Vette (a 94 LT1), and would like to start adding go-faster stuff, but I'm pretty darn mechanically illiterate. I've read somewhere that one of the first recommended mods would be to lower my Rear Axle ratio. So, as this is a stock LT1, I have no clue what ratio is in it, and would like to know what ratio to go with for this change.

Also, what ration is lower, a 3.54 or 3.75? I've heard of a 4.10(?).

And finally (for this post anyway), what is the difference between a Dana 36 and a Dana 44?

Any help is appreciated! :confused:
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Old May 23, 2003 | 10:47 PM
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Default Re: Recommended rear end gearing? (68someday94now)

lower ratio=numerically higher
so 4.10 is lower than 3.54

For an automatic, either 3.54 or 3.73 gears are best. 4.10s will kill your mileage if you have to drive this thing on the hwy. Which of those two you pick depends on how much hwy driving you do now. Either will probably give .2 in the 1/4mi at least. Adding a higher stall torque converter will also drop times.

A D44 carrier is a beefed up carrier that is standard in all manuals from 85-96, its much stouter and you can run slicks on it.

The D36 is slightly smaller, its tougher than whats in a Taurus or Caddy but not enough that you can put slicks on. If you do it'll shatter eventually. All automatics have a D36.

If you want a drag king, put the 3.54s or 3.73s in the D44. Youll probably not have to worry about it breaking until you make SERIOUS hp.
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