I've been frantically searching to try find the thread i saw a good +4 years ago and it was of someone who made a budget hybrid B series gearbox that had a gear out of a D series, I think it was third or fourth and it was either flipped over or required some machining. I'm just trying to build a cheap close ratio gearbox using a mix of oem B series and mfactory gears (plus hopefully D series to give me some more options). Anyone know of the small thread a few years back or can offer some help? This would be right up Bense's alley but its a pity we dont see much of him these days on the forums.

Cheers.

 

Not possible.

 

Synchro sizes, shaft OD's and gear ID's are completely different.

 

ah ok, not good.

Do you know if you can swap B series gears around like with the Mfactory D series setup where you use the 3rd gear as a close ratio 4th?

 

3rd gears all need to be 3rd gears. 4th gears all need to be 4th gears. LS gears can't be mixed with a B16/GSR gear due to different synchro sizes.

 

^^^^If thats true then how do people build gsr trannys with an ls 5th gear on them?

 

D series gears dont fit on the b series main shaft and hub and sleeves of d series doesnt fix on the b shaft but h series 3rd and 4th can work on the b series main shaft

 

He was referring to LS 3rd/4th gears not being able to be used in DOHC VTEC B-series transmissions.

DOHC VTEC B-series transmissions have larger synchros for 3rd/4th gears. 5th gear is same size, but different ratio.