fitting another car gearbox to alfa 33

[lenus]

the 4x4 has no rear dif, and it is a standard 50/50 arrangement. it will just always spin both back wheels at whatever speed the gearbox is turning.

I guess if you take into account the front dif, if all the wheels were spinning more like 66% of the drive would goto the rear wheels between them.

The p4 equipment is out of a fiat panda.

It's already being pushed pretty hard in a p4...

[Serpent33]

The gears inside a late 146 models are finer. Which means thay are quieter and filmsier. The early ones have lesser teeth. Having performance clutch can be more punishing to the gearbox than higher hp.

[active]

Hm.. but mine has the rear diff. Maybe it's from p4, but the gearbox is defenetly from 4x4. it has manual switching 2wd 4wd. Do all p4 had rear disk brakes? Or maybe some of them still had rear drums?

[77SudTi]

sounds like you have a box from an earlier car 4x4 system like the montecarlo wagon or similar where there was no centre diff / viscous coupling. Pretty sure all p4's got rear discs and some 2wd's if you opted for ABS in the later models, yet to see one of them!

[active]

I defenetly have rear diff.I saw it ! And about center diff.. is it in gearbox ? 50/50 front rear? or left wheel right wheel?

[damonb]

If you have lever to switch from 2wd to 4wd then you have old style setup from series 1 wagon, etc. There is a rear 'diff' but it's locked, so 4wd can only be used on loose surfaces or snow. The P4 system is permanent 4wd - you can't switch it off, and it has a viscous coupling to rear.

[lenus]

You actually can switch it off, but it's not really meant to be.

There is a relay in the engine bay that you can take out and it dis engages the electromagnetic coupling. It's apparently there for EU markets where the cars have ABS and it disengages the AWD under braking. It still does it in Aus delivered cars.

Some people hook up switches to this couping so they can turn the awd on and off, personally I don't see the point, but you can do it.


lenus.

[PSk]

Quote:

Originally Posted by lenus Some people hook up switches to this couping so they can turn the awd on and off, personally I don't see the point, but you can do it.

[77SudTi]

A true 4WD system will have 3 differentials, of which neither the 4x4 wagon or the P4 have. The P4 uses a viscous coupling in place of the centre differential. The earlier switchable 4x4 system was only designed for loose or wet surfaces where wheels could 'slip' easily accommodating the lack of a centre diff, and negotiating sharp turns with 4x4 engages was not the idea. Due to the earlier 4x4 system not having a centre diff, transmission wind will occur and sooner or later something will give.

The P4 set-up is by far the better system, although still less than ideal.

[Spooty22]

Was just reading that the 4wd system for the p4 was indeed the same as the Fiat Panda, and was designed by an Austrian company called

Steyr Daimler Puch

They also made the 4wd systems for Mercedes G-Wagens and VW Transporter Syncros. Maybe some parts commonality?

Oh they also specialise in building Mil-spec 6x6's

[Spooty22]

I have an old Modern Motor article testing the series 1 33 4wd. Around Oran park (yep bitumen!) it was 0.3 seconds faster per lap, on average, than in
2wd mode. Pretty surprising, actually.

Also, apparently a series 1 33 4wd won in class at the 1986 Monte Carlo rally

Has anyone seen a 'Monte Carlo' wagon? Apparently an Aus market special edition. The suspension sounds interesting, it was developed specifically for the Australian market. Or so modern motor says:

" ...and the sports suspension developed for, and in, Australia really does work wonders.

The car sits flat and firm on its 30 mm lowered springs while the revised geometry, new front anti-roll bar and the standard Koni shock absorbers ..."

So there you have it! I want to take one apart to see what this "new anti-roll bar" and "revised geometry" is all about.