OEM 4.7fd interchangable?

[Mugen_R]

Would the oem 4.7 final drive from dc2r fit b16a\b18c2 box?

[bennjamin]

With the itr 1st gear , counter shaft and a few other small parts yes ( itr needle bearing lower collar etc)

[Djbinh]

nice nice info, been looking for this answer

[Mugen_R]

thanks for quick reply, just curious
how much the oem 4.7 fd usually go for second hand

[Limbo]

it will fit in the b18c2 as a drop in as will the LSD

[e240]

Would the oem 4.7 final drive from dc2r fit b16a\b18c2 box?

Ok, FD is interchangeble between all B18C/B16B - as ben says for the '98 Spec ITR box.

All EK9/ITR LSD's are the same. The ring gear difference is between the B16A (small diff) and B16B/18C (large diff).
The '98 spec difference is with the countershaft, as the '98 spec uses a slightly different fitment 1st gear.


B16A
B16B/B18C/B18C '98 Spec

[Limbo]

pretty sure the dc2 b18c2 one has the same gear size cos i used that to drop my LSD over.

The b16 is different that's for sure

[e240]

pretty sure the dc2 b18c2 one has the same gear size cos i used that to drop my LSD over.

The b16 is different that's for sure


All b18Cs are interchangeable with other B18Cs (including '96 spec type Rs)and B16Bs

[Mugen_R]

i think limbo is refering to b18c2 not b18c 96 spec or 98 spec

[Mugen_R]

So your saying i cant use OEM 4.7fd unless i use the lsd from it as well other parts?

[e240]

Would the oem 4.7 final drive from dc2r fit b16a\b18c2 box?

It will fit the B18C but not the B16A

See post Above

[Mugen_R]

thanks for that mate,

[e240]

So your saying i cant use OEM 4.7fd unless i use the lsd from it as well other parts?


You can use them in other B18Cs, just not the B16A

[Mugen_R]

So i can use the 4.fd on a b18c2 GB non LSD without using the 98 spec lsd?

Confused now cos u edit ur post

[e240]

So i can use the 4.fd on a b18c2 GB non LSD without using the 98 spec lsd?

Confused now cos u edit ur post


Apologies - I posted some incorrect info regarding the LSD sizes and was correcting it.

Basically, an OEM 4.7 FD comes off a '98 spec type R. While you can fit the 4.7 ('98 B18C R) onto into any B18C or B16B, it is not straight forward because the '98 spec uses a slightly different fitment 1st gear. You need will need the '98 Type R spec 1st gear, countershaft etc (as Ben said).

It may be simpler to just purchase a Final Drive to suit your current diff.
and if you're going through all that trouble, you should put in the LSD as well.

Finally, the diff size of a B18C/B16B is different from a B16A, so the FDs are not interchangeable.

Hope that clarifies.

[Mugen_R]

thanks mate