final drive

mr_mopar_neon · Post by **mr_mopar_neon** » Thu Oct 08, 2009 4:32 pm

has any one or any one know any think about changing the final drive on a r/t box???

looking for a drag racing set up but nothing to ott

Post by **occasional demons** » Thu Oct 08, 2009 5:25 pm

The output shaft (part of the FD) is over $1000. It is cheaper to buy the 1.8 mtx.

ZeroChad · Post by **ZeroChad** » Thu Oct 08, 2009 6:14 pm

There's a guy I think his name is Drakito on the other org that rebuilds trannies. I think he does 4.12 conversions as well. He might be of some help.

Post by **racer12306** » Thu Oct 08, 2009 6:31 pm

I thought this guy was looking for a 3.94 set.

The 4.12 is $$$, but it would be interesting.

ZeroChad · Post by **ZeroChad** » Thu Oct 08, 2009 6:52 pm

I think he's looking to put a different final drive on the 3.94

Post by **occasional demons** » Thu Oct 08, 2009 11:02 pm

ZeroChad wrote:I think he's looking to put a different final drive on the 3.94

That was my impression, too.

Scratch the 1.8 MTX. The '01 parts has it as the same as the R/T MTX. The 4.12 is the 1.6 MTX part number 5016669AD $2,770.00

Standard 3.94 gears:

Part Number: 5017853AA SHAFT TRANSAXLE $1,370.00
Part Number: 4761103 GEAR DIFFERENTIAL RI $225.00

Post by **racer12306** » Fri Oct 09, 2009 7:52 am

My bad, i misread on a r/t box as to a r/t box.

mr_mopar_neon · Post by **mr_mopar_neon** » Fri Oct 09, 2009 5:39 pm

so its going to cost me a loooooot of money

Post by **occasional demons** » Fri Oct 09, 2009 5:47 pm

Unless Drakito has a (cheaper) source for 4.12 gears, it will be way OTT.

ZeroChad · Post by **ZeroChad** » Fri Oct 09, 2009 6:02 pm

Check it out here: link

Donkeypuncher · Post by **Donkeypuncher** » Sat Oct 10, 2009 12:26 am

Or you could just get shorter tires, it accomplishes the same thing.

Post by **occasional demons** » Sat Oct 10, 2009 1:23 am

Yeah, but you may be scraping the underside of your car off to do it.

Fuck it, weight reduction FTW!

Donkeypuncher · Post by **Donkeypuncher** » Sat Oct 10, 2009 4:48 am

I figure the gap between 3.94 to 4.12 is small enough it wouldn't be a problem. How much smaller would you really need to go, maybe 2 sidewall sizes smaller.

It would be a bigger problem with 17's though, don't want the sidewall too thin.

Post by **occasional demons** » Sat Oct 10, 2009 7:30 am

I was thinking more in terms of 3.55 to 4.12, and I was adding a little exaggeration/humor to it.

mr_mopar_neon · Post by **mr_mopar_neon** » Mon Oct 12, 2009 4:09 pm

thanks guys ill look in to it a little more yet