Has anyone done it, how much does it change the gearing, or should i go out a just buy another tranny.

Also how well would that work for all motor, i run 14.5's at 96 with in a LS-VTEC. I just fell the tranny is holding me back.

 

just get another tranny, b16 will be ideal!

 

Ask Bense.

If I were to answer, I'd say just get a B16 tranny if you're only concerned with going fast in a straight line. Or a JDM ITR. Best of both worlds to some extent. LS tranny is good for boost because of the long gears

 

I know i could go out and buy another tranny but i don't want to because a final drive is a little cheaper, and i was hoping it would be comparible to a GSR.

 

hahaha, I completed my LS tranny about 45 days ago. I kept the same final gear and added an OBX limited slip diff. Watch out. The OBX limited slip is oversized. I ended up grinding the diff thrust washer to "unbind" the install. Plus I went ahead and changed synchros and changed out all bearings.
I wish you the best. I am glad I performed the refurbishing this time.
Next time....... yeah you know what?? I'll do it myself again. I made every rookie mistake possible and still feel a sense of accomplishment. Now remember I rebuilt an old 91 LS manual cable tranny. Not a super duper tranny.
Last you need to have the time time time. Do not rush. Slow and steady focus with lots of pics!!!!!!!! good luck.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by gutted-dx &raquo;</TD></TR><TR><TD CLASS="quote">I know i could go out and buy another tranny but i don't want to because a final drive is a little cheaper, and i was hoping it would be comparible to a GSR.</TD></TR></TABLE>you can change the FD to a 4.40, it will make a little difference.

 

4.785 final drive (98+ jdm itr) with b16 3rd & 4th gears FTW!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bense &raquo;</TD></TR><TR><TD CLASS="quote">4.785 final drive (98+ jdm itr) with b16 3rd & 4th gears FTW!
</TD></TR></TABLE>the gear you need to switch is 4th, 3rd gear in a 4.7 itr transmission is the same as in a b16 1.458!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by smokey2.0 &raquo;</TD></TR><TR><TD CLASS="quote">the gear you need to switch is 4th, 3rd gear in a 4.7 itr transmission is the same as in a b16 1.458! </TD></TR></TABLE>

yeah but he's got the ls gears

ls 1st & 2nd are the same as gsr.

taller 2nd & shorter 3rd = closer ratio

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bense &raquo;</TD></TR><TR><TD CLASS="quote">

yeah but he's got the ls gears

ls 1st & 2nd are the same as gsr.

taller 2nd & shorter 3rd = closer ratio </TD></TR></TABLE>you got me there, i was thinking strickly about the jdm itr transmission! your right!

 

So would the jdm ITR final drive, in a LS make a noticable difference.

 

It will make some difference, but final drive gearing will just shift everything up/down.

The issue is that honda specifically tailored the gear ratios of the transmissions to match the powerbands of the engines they were mated with.

That is one of the real reasons for the success of the VTEC engines. The gearing is tight, so that when you shift, it puts you back to a strong point in the powerband..

Because the powerband is so high in the RPM range on most of the VTEC B-series motors, you end up requiring narrower gates.

Consider a B18A vs a B16A.. say both have sweet spots about 2500 rpm wide.(hypothetical numbers) So, say on the B18A, thats 4000 - 6500rpm, and on the B16A thats 5500 - 8000.

So, on the B18A, the powerband is ~38% of the rev range. On the B16A, its ~31%. Hence, the B16A came from the factory with the narrower gear spacing.

While Changing the final drive will help put more power to the ground through torque multiplication, it also forces you to shift earlier, and more important, it doesn't do anything about where you fall in the powerband when you shift.

What RPM are you shifting at, and what is your VTEC crossover point? These numbers will help determine the correct path of action. Are you falling out of VTEC on your shifts?

 

also keep in mind the concept of torque multiplication guys.

i hate reading about how "LS gears" are best for boost because of the "longer" gears. while this is somewhat true in the sense that a longer gear allows for less wheelspin and more time for boost to spool, the truth of the matter is that boosted honda engines actually produce enough torque to overcome a "longer" geared transmission.

also, may i add that my turbo LS is doing just fine with its GSR transmission.
there was a definite improvement over my LS transmission in every aspect. So this goes against how LS trannies are the "best" for boosted engines.

I would have went with something shorter, but I spend a lot of time on the freeway.

to the OP, let me know how you like the 4.78 in a LS. I may rebuild my old LS trans with an LSD and 4.78 FD.

 

5900rpm Crossover
Redline is 8200
Yes i am falling out of Vtec

 

up

 

opps didnt read whole thread but yea agree with above it might make a diff either way its and upgrade thats the way i see it

 

any updates on this final drive in a ls tranny?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by volcom40street2 &raquo;</TD></TR><TR><TD CLASS="quote">any updates on this final drive in a ls tranny?</TD></TR></TABLE>

ring gear doesn't bolt up to ls diff.

 

so to take the auto trans out of my 98 is not hard to do other then the axels?,. i need to replace mine and wanna know how difficult its gonna be once the axels are out of the way?

 

bump! listen to bense hes like the transmisson god! hahaha

 

I know IM bringing this back from the dead...But if you change the final drive in an LS transmission to a Type R final drive do you have to change the countershaft?

Im about to put a type r lsd and final drive in my ls transmission And i would like to know before i open the tranny so that i can go ahead and order the parts.

THanks, JMAN

 

I'm still curious as to if this was completed or given up on. If completed then guess im waiting to see what's up with the turn out

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jman86 &raquo;</TD></TR><TR><TD CLASS="quote">I know IM bringing this back from the dead...But if you change the final drive in an LS transmission to a Type R final drive do you have to change the countershaft?</TD></TR></TABLE>

absolutely yes