I was curious if a .5 6th gear could be installed in a 93 T56 in place of the .62. That way I can keep all of the nice low gear ratios and yet have the better OD.

 

Gas is getting pretty expensive out in CA I hear

94 and later use a .5 6th so I would think it could be used in a 93, but I've not heard of anyone changing ratios. It seems like quite a bit of work to tear into the trans for such a little gain in ratio but maybe the gas savings would make up for it .

 

you'd only be dropping about 20% rpm's at typical cruizing speeds...so basically rebuilding a tranny for 200 highway speed? doesn't sound very economical to me...

 

I would only do it if I had it out anyway (during a cutch job), and if it was reasonable cost wise during a refresh/rebuild (I've done some manual rebuilds before and could handle dissasembly and changing some parts and gaskets.)

 

Unless you have aftermarket gears, the '93 model cars came with 3.23's from the factory instead of 3.42's like the '94 and up, so that .62 6th gear coupled w/ the 3.23's is about the same as the 3.42's coupled w/ the .5 6th gear. Any more overdrive and the car would probably lose fuel economy from lugging the motor. You should be able to do over 80mph @ 2k rpm as it is.

 

Yes you can. There was also a guy who made custom t-56 gears too, but I dont know who.

 

I have a 93 Z with the 3.23 gears and a 95 T56 and I am just waiting to see the rpm's I turn at 80.