Sorry I don't know if this topic belongs in this section
but I tried searching but could not find the answer I was looking for.

I have a USDM GSR tranny and was playing with the fact of adding in a ATS 4.928 final drive. I read that I'll need to swap in a 98 JDM ITR 1st gear but unsure if any other gears will be needed.


Reason why I ask is because I read that I should swap in the itr 2nd gear if I want to remain in vtec once I switched gears.
Also is there any benefits of adding a ATS FD on a USDM GSR tranny or am I just wasting time?

Goal in mind I have is to accelerate quickly, but still have the drivability on the highway if possible by not remaining in vtec at highway speeds.

 

I'm not sure about ATS and what all the troubles you need to go through to install it, but I DO know that the MF 4.9 FD is a direct install and will acheive yours goals of acceleration. Check us out! http://www.teammfactory.com/index.php

 

is there a benefit from installing the 4.9 FD when all my gears will remain the same?

 

Yes sir

 

Sweet I guess that will be the route I'll go. Thanks!

 

yeah go with MFactory. they are good people and you wont need to change the 1st gear and needle bearing which saves you some money. plus the itr second gear is built into the shaft, so it would be rediculously expensive to buy new both counter and main shafts.

 

I have the mFactory 4.9FD in a 95 GSR trans on a b20/vtec with 149tq, 135tq at 2k rpm. The acceleration is great except for 1st gear is worthless even with a KAZZ LSD just will smoke the tires. All other gears are great especially during auto-x and track days keeps the motor in its sweet spot when i need it most coming out of corner exit. Been in use for 1.5 years now with no issue. Hope this help.

 

Yeah, if you are using a 4.928 FD (whatever brand it may be) and you want to have a useable 1st gear (I'm not talking about normal driving, that's fine), then it would be best to also install a longer 1st gear at the same time

 

Have you thought about the JDM 4.785, your 1st gear is still OK, it's direct drop in (OEM Honda) and you save ~$200 over the Mfactory. Unless your a hard core racer I'd save your clams for something else.

http://www.hmotorsonline.com/shop/sc...age&item=10006

 

no the first gear isnt still ok...it just appears that one comes with everything you need to change. but for 150 more he can make a real change in gearing instead of only going to the 4.7

the mfactory is more plug and play than the oem honda one since if he decides to not get the longer first gear he only has to change the ring gear and shaft (im not sure if its the main or counter that gets changed...i dont know everything yet lol) but thats splitting hairs i think.

 

Exactly what I was going to suggest.

 

I'm running the GSR/Ls 1st, 2nd gear with the JDM FD and it works for me, not knocking the Mfactory stuff just wanted to present d-yup with other ($$$) options.

Good luck

 

He already has the 4.928 FD, so he isn't going to save more money buy purchasing another FD :p

Also, if he did get the JDM 4.785, he would also need to get the JDM 1st Gear/Collar/Bearing in order for it to fit.

 

I have a JDM FD, I don't remember changing anything else.

 

If you have the oem '98 spec ITR 4.785, then you must also have the oem 1st gear from the '98 spec ITR tranny. It is physically impossible for you not to, as the 1st gear fitment is different.

 

I don't know what it is from besides it's a JDM 4.785 FD. It came out of BearsEK 's(Mike) old drag car trans before he went to a 5sp setup last year. I also bought a B16 trans from him at the same time so he fixed the mashed up B16 and offered to install the FD for me while it was cracked open before I drove up to get it. I don't recall him having to change first gear. Although, I had the trans open 5 times last year for an LSD issues but I wouldn't have known to look at that. Does this mean i can't use your 3.070 1st gear I was getting ready to purchase?

 

If he modified the B16/GSR 1st gear (increased the ID by 4mm), then it would work with the JDM 4.785 Countershaft. It's a bit touch & go doing this though, as it could affect the integrity of the gear if not machined 100% accurately.

We have fitments for both the '96 (B16/GSR) and '98, so is not a problem

 

Thank you, besides I don't know what to order...I will talk to Mike. Thanks.