Thread: turning a ZF box from 4wd to 2wd

Originally Posted by Lok Simpson

Hi guys , looking for some help.

Im doing an engine/box conversion , and need to turn the auto from a 4wd box to a 2wd box. Now , i have the vehicle here , havent pulled the motor or box out yet , but have been told its a ZF box , so im wondering , is there a rear section available , so i can lose the transfer case and fit a rear extension housing from another gearbox onto it , and what tailshaft/ spline should i be looking for.

Motor/box combo is being retro fitted into a gemini and will be street registered.

P.s , im not some pimple faced 16 y.o with dreams of being delusional.. I already am delusional!! lol

you have a few options,

1) strip a range rover classic or Disco 1 V8 zf 4HP22 and fit the BMW / JAG output shaft (from a hydraulic 2wheel drive box) and rear housing and flange etc, note this housing won't have a speedo drive gear

2) find a bmw/jag 2 wd hydraulic 4HP22 and fit the RR V8 bell housing and converter

note the V8 bell will can't the box over by about 15 deg so you will have to mod the 4 WD sump to get ground clearance, ir trim off the lower part, this will be clear when you look at one,

Dave

I have aquired a 4HP22 from a beemer with tailshaft for $50 , pick it up this weekend , so the 4wd box wont be used now , i'll either sell it or gearbox someones doorstep with it.

Should just leave the 4 cyl BMW engine bolted up to it...

The BMW M12/13 turbocharged straight-4 engine was famous during its life for being the first Formula 1 engine capable of 1,000 hp (746 kW) in racing trim, although it was capable of nearly 1,400 hp (1,044 kW) for qualifying with modification of its boost. This engine had a bore and stroke of 89.2 mm (3.5 in) x 60.0 mm (2.4 in), giving a displacement of 1,499.79 cc. Maximum crankshaft speed was 11,200 rpm. Peak power b.m.e.p. was in the region of 1,000 lbs/sq.in.

JC

Meh, that's got nuthin on the mighty 3.5rover v8 jc

Originally Posted by Vern

Meh, that's got nuthin on the mighty 3.5rover v8 jc

Meby if 4 cyls wern't union reps

AM