jmmullin

iTrader: (2)

I was thinking about changing out rear end gears first, as they are 4.56:1, but was wondering how many options I had for changing transmission gears instead. Really the only thing I want is better 6th gear MPG for highway use. As a disclaimer, I dont know anything about transmissions except that mine is an M6 in a 2000 Z28...so this very well may be a very dumb question that can't be done.

Basically is is possible for me to have a shop economically put in say, about a .35 or .30 gear for 6th instead of the .50 overdrive gear in there now? Something to get the cruising RPMs at 70-75mph back under 2000...thanks.

the_merv

iTrader: (88)

I see changing the rear gears to be a better option here..and definately cheaper.

jmmullin

iTrader: (2)

yea I'm sure the rear gears would be cheaper, but I'd still like to keep the 4.56s for drag racing; I mean if this transmission gear could be done for less than $1000 then I'd do it. Then again, the savings in fuel of $1000 from having the job done would probably take 3 or 4 years to accumulate; soooo, it'll probably just stay the way it is...

Just thought I'd check to see if this idea was even feasible.

calhoon

iTrader: (6)

Unless you make some custom gear cutting, .5 is the lowest gear ratio currently made. In fact if you were to design a .3 driven gear, it would prolly have a smaller diameter that the mainshft you want to install it on. I don't believe you can do this without major redesign . In the end, you would severely weaken the box.

thesource

iTrader: (60)

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