does any one know for sure what ratio the front transfer is

lavoy1

i have spent the last week searching every forum on the planet and there are two answers one group says 2.47 and another says 2.526. if its 2.526 then the vc barely has to eat up any rotations every mile but if its 2.47 then its eating up a boat load , even more so then a crv / wagon combo would. i am ready to order my tires and cant do so until i know for sure 100% which ratio is correct so i can use tire size to duplicate in my crv/wagon set up exactly what the vc sees in a stock wagon. please dont say search because i have searched for this data more then any human has ever searched for something and i still get 2 different answers. i need some concrete data from some other people who have access to this data other then the 1 or two people who have posted about it here and on other forums.

lavoy1

here is why i ask, so far every one who does a conversion is only interested in using tire size to equal out the difference front to rear. example would be epic tuning and their solid drive shaft when you do the math using a crv front and wagon rear it takes a slightly taller tire in the front to make every thing not bind. how ever when you do the math using the wagons factory specs ( if the 2.547 is correct ) the front tires are actually doing more revs per mile then the rear preloading the vc a little , its only 2 revs per mile but its still something, over a long trip that adds up and you probably dont want much more then that for fear of cooking the vc. so if i want to duplicate the exact conditions so i can trick the vc into thinking its still between a wagon transfer case and a wagon diff i need to actually go smaller in the front NOT taller as every one has been suggesting. i only have to go .05 smaller to exactly duplicate the wagons preload. matter of fact running the same size tires front and rear will put me right between being balanced and having some preload because going with a .123 taller tire balances it out ( not the .2 epic suggested ) of course all of this is only correct if the wagons numbers really are 2.547 front and 2.529 rear.

markl

This is out of the 1991 civic wagon service manual

Front Diff 4.428 Page 13-33

Rear Diff 2.529. (ring gear 43T pinion 10T) page 15-23

I cannot find the gear ratio of the transfer drive. The rear driveshaft is overdriven obviously.


Yeah, I know, not much help.

Mark

markl

I am sure you have seen this, but just in case

http://www.tlarengineering.com/rallysolbuild.html

They seem to believe the diff is very close.

lavoy1

yeah but over on hondatech that guy is so confused about whats what he has decided to give up on it. he has burned up two vc trying to sort it out.

Jaker

This diagram is based on my actually counting the teeth on the gears in the transmission and the transfer case. Based on my tooth counts and calculations, it's 2.547:1