Hi Tranny profis

I have a 1994 Civic SIR With a b16a2 and the Y21 Tranny and 4.4 Final D. I doing a lot of Highway driving and want to make my gears longer.

So what i bought is the 4th and 5th gear from the JDM Integra Type-R S80 tranny which are longer gears than my Y21 tranny. I have no LSD

I also found a LS final drive 62 totth 4.26 FD i would like to swap that too so that all my gears are a bit longer. I have a Turbo engine

I searched all over the internet but no one ever did that. My question is when i swap the Final drive gear over to the LS will i also need the counthershaft from the LS to make it all work?

Hope someone can give me some answer.
Thanks

 

final drive units consist of the counter shaft and ring gear(need to stay together)....so, yes, you would need the LS counter shaft and ring gear. I personally have not done such a swap, but you shouldn't have any problems

 

I switch from a straight up gsr in my ls turbo to a late cable ls (ys1) in a gsr case with a late hydro fifth and a b16 ring gear and gsr c'shaft (4.40 final.It knocked about 600 rpm off at seventy mph.It made a huge difference.I think the ls final in a b16 would be a real dog.I would just do the fourth and fifth and keep your b16 final.Check out a couple of the gearing calculators and play around.

 

@njin buildr

Yea i checked some gearing calculator and i will stick with just the 4th and 5th from a JDM ITR in a B16 trany and leave the 4.4 final the way it is

 

It is always good to keep the ring and pinion as a matched set. Doing anything different can spell disaster...remember that it is not only tooth count that matters...there is also gear pitch that can vary So never just go off of a tooth count....a different pitch from an improper gear mesh can destroy a transmission very fast!!