so its safe to assume all GC rally cars run a R180 4.11 diff? odd- as ive not heard of such a combination.

the only diffs available in an R180 were 4.444 for the GC8, and only recently 3.9 ratio with the 02 onwards 6 speeds.

if this is a comparison of a 4.444 standard R160 crown in a normal subaru, yes they are cheap and weak. as opposed to a homoligated 4.444 R180 crown, they are a different story again.

i doubt most rally teams given a finite budget would risk a rally using R160 4.11 diffs and standard r160 axles.

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Long live the WRC

Guys get off the web and actually speak to some people who use the stuff.

We are talking R160 for the GC8 in Aus

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Speak to Shane @ SMC Tyres, Unit 6/385 Sevenoaks St Beckenham WA 6107. Mobile 0413 128 087. Tell him Maddog sent you!

yes, R160 arent the strongest- understood and agreed!

yes, the taller the ratio, the less rotation of the prop shaft and the less heat generated in the diff because of the increased contact time.

though, upgrade to a R180 and i think the reliability issues are back on your side, regardless of the ratio.

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Long live the WRC

Actually morgan, IMHO, the 4.44 diff will have more teeth in contact than a 3.9/4.11 diff..

bear in mind, to get a ratio of 4.44 it will have MORE teeth, than a 3.9/4.11 diff, now, the flip side to that is this..

the teeth will be smaller in thickness and possibly face area, marginally, however..

given that the teeth will be smaller, it is HIGHLY likely, that instead of having 1.5 teeth in contact at any given time like a 3.9/4.11 diff, it will have 2 teeth in contact at any given time, meaning the load is spread accross a greater surface area, meaning that its actually highly probable that a 4.44 diff is actually stronger than either of the other ratios..

now the only way to truly check this is out, is to one of each diff, check how many teeth there are in contact at any given time, but im willing to bet that the 4.44 will win ahnds down for pinion to crown face time..

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Jesus Built my car, Its a love affair, Mainly Jesus and my hotrod

Ummmmmmmmmmmmm...... cool! , you guys have givin me ALOT to think about

all i know is that i had to pick from a 4.11 or a 4.44 .. i chose the 4.44 as i was told it would be better for a track and stronger but i will lose top end speed.

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may the forced induction be with you

Had the 4.44 RA box in the previous ride. It was great on the track. First time i had it on the road, with the traffic moving at a snail's pace, it was an experience.

You learn to take off from stand still from 2nd very quickly.

I loved it for the track, it was great. A few quick changes and you're already at your target speed and boost was always quick to get to and keep at.

Missus hated it for the daily driving for the reasons mentioned above

should be fun when im driving it to work and back , peak hour: Darch (kingsley) to town

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may the forced induction be with you

The 4.44 pinion is MUCH smaller that the others and obviously with more teeth. The 4.44 Crown is just slightly larger with...you guessed it, more teeth than its lower ratio counterpart. Given these extra teeth the base of each 4.44 gear is narrower compared to its lower ratio brothers. This significantly reduces the gears strength.
Hence the GC8 R160 4.44 diffs are much weaker than the 4.11 or 3.54 diffs.

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Speak to Shane @ SMC Tyres, Unit 6/385 Sevenoaks St Beckenham WA 6107. Mobile 0413 128 087. Tell him Maddog sent you!

my advice is not to even bother with the 4.44. my reason being the wont stand the test of time ive blown up my 3.9 standard box, then the 4.44 which was running an sti clutch and now ive got the 4.11 which ive had in the car the longest of all 3 boxes ive had.

it all depends on what u want and what ur willing to spend. if it gona b a dialy driver or u want a good balance between acceleration and topend power the 4.11 is awsome.

my 4.11 box in 5th gear at 7000rpms clocks out at 225 km/hr if u wanna go ne faster than that put a set of dog gears in the 3.9 box.

PS wtf is 4.44 ? AFAIK its 4.444

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[DBR]