Gearbox interchangeability?

Paul_mc · Post by **Paul_mc** » Sat Aug 04, 2012 11:55 am

Hello all..

My Bro and I have my 4G 2.2 VTEC UKDM as a track day machine that we intend to fit an M2B4 gearbox.

My daily is an '00 5G VTI which I understand has a M2P4 gearbox with ATR ratios minus the LSD. I've seen that guys fit the ATR LSD box in the 5G BUT is there any benefit to the M2B4 box in the 5G and is it compatible?

Thanks, Paul

Prelude Gearbox ID Codes

M2A4 - JDM 4G
M2B4 - JDM 4G LSD
M2F4 - USDM 4G
M2U4 - JDM 5G Type-S ATTS/USDM Type-SH ATTS
M2Y4 - JDM/USDM 5G Base
M2Z4 - JDM 5G SiR S-Spec/JDM 5G w/ LSD option
M2P4 - UKDM 5G 2.2VTI ('99-' 00) same ratios as the U2Q7 Accord Type R box, just minus the LSD

mills · Post by **mills** » Sat Aug 04, 2012 12:46 pm

Alex has just done this conversion on his 5th gen bud, may be worth dropping him a pm for a bit of info

A1ex · Post by **A1ex** » Sat Aug 04, 2012 2:27 pm

Indeed I have, well Tramroadmotors did the work but he showed me everything he did.

The 4g boxes will fit in a 5g, the M2B4 has similar lower gears but a longer 5th gear than the M2P4 which is great

& your right that box is the ATR U2Q7 minus LSD.

With regards to the swap, there is no modification required. You will end up with 2 bolts left over as there is a slightly different stud pattern around the bottom of the box. 1 is a small locator bolt and there is a slightly larger 1 at the bottom of the box, the fact that they're not present on the 4g says that you can get by w/o them. The speed sensor is also different but you can just put your 5g one in the 4g box.

Paul_mc · Post by **Paul_mc** » Sat Aug 04, 2012 3:31 pm

This is great news, thanks for the info guys.

I was considering my options but it would seem the M2B4 is a better option for mixed road driving.

Paul

LudeIOW · Post by **LudeIOW** » Tue Aug 27, 2013 10:30 am

awesome just what iv been looking for

mercutio · Post by **mercutio** » Tue Aug 27, 2013 10:31 am

you going manual buddy?

LudeIOW · Post by **LudeIOW** » Tue Aug 27, 2013 12:40 pm

i think im going to have to my box is now stuck in second

but dunno if i can stump up the money

samiya85 has offered me all that is needed to get the job done - but postage from leeds to the IOW aint cheap

bb1boy · Post by **bb1boy** » Tue Aug 27, 2013 12:41 pm

Is it cheaper to buy a whole donor car a little more locally?

LudeIOW · Post by **LudeIOW** » Tue Aug 27, 2013 12:48 pm

i know of 3x 4gs and 2x 5g on the island and none in any of the scrap yards

bb1boy · Post by **bb1boy** » Tue Aug 27, 2013 12:57 pm

ok.. um, daytrip to the mainland? A gearbox will fit in your boot.