my first launch

[JAP63]

Matt, word of advice, don't launch it hard to many times without being slightly rolling forward first. You only have to be rolling forwards slightly to take great amounts of stress off the gearbox/transfer/diffs.

Hahah, definantely dont be rolling backwards either.......

Your right though, if theres a bit of motion in the gears there shouldnt be as much backlash or takeup when it snaps on boost. The gearboxes are alright, theyre not weak pieces of shiiit, but having said that, these cars are gettig on now, and theyve probably at some point been treated by a ham-fisted driver........
And as for the xfer cases, they just seem to be the weakest link in the driveline...i never had a prob with any of my gear though, but i never had a real heavy bitting clutch and always slipped it on a bit when getting away........

Clutch< Gearrbox..dont make it the other way around.!

 

[VR-4Squid]

Yeah, it was sarcasm, basically the alloy housing has slightly different thermal expansion rates to the hardened steel outer bearing cups that sit inside the housing...all it takes is a bit of bad luck, or a hard launch...and the bearing cup spins in the housing, the newer xfer cases were steel to avoid this happening.

hmm interesting, mine didn't do that when I broke it, It just split the front housing clean in half like a clamshell!!
171kW, rwd, rev limiter launch in 2nd gear - about the 4th in a row

The steel cases are similar in thickness to the alloy ones, so about 3 times stronger (and ALOT heavier).

 

[JAP63]

hmm interesting, mine didn't do that when I broke it, It just split the front housing clean in half like a clamshell!!
171kW, rwd, rev limiter launch in 2nd gear - about the 4th in a row

The steel cases are similar in thickness to the alloy ones, so about 3 times stronger (and ALOT heavier).

You manage to shear an aluminuium alloy case? or was it a cast steel alloy one?
Being RWD is probably the worse scenario for the xfer..haha, no wonder you've shatterd one

Most of the aluminium alloy ones ive seen are either shagged from spun bearing races or the gears have been tortured, once the housing is letting the bearings spin, its a sure death, just a matter of time. Sometimes it will spin in the case an dthen lock again because of the metal deforming around it, but sooner or latetr a good launch or driveline shunt will see it spin again, until it keeps spinning, then fails..lots of noise and heat follow after that and munched gears usually.

 

[VR-4Squid]

You manage to shear an aluminuium alloy case? or was it a cast steel alloy one?
Being RWD is probably the worse scenario for the xfer..haha, no wonder you've shatterd one

yea an alloy one - have since replaced it with an evo2 steel one, no probs now (er, aside from an appetite for axles)

 

[mattrat]

vr4 squid is yours still RWD, do you have a 3 bolt or 4 bolt rear in it?
would a 4 bolt one break axles being RWD

 

[VR-4Squid]

vr4 squid is yours still RWD, do you have a 3 bolt or 4 bolt rear in it?
would a 4 bolt one break axles being RWD

3 bolt mech lsd.

in fairness it took an absolute hiding before I broke an axle - 4 or 5 months.

I won't say you definately won't break a 4 bolt axle. . . but I doubt it'd be a common occurance.

oh, and at the moment it's fwd - haha,

 

[JAP63]

You run a 3.909 driveline then i assume?

Dont worry mate, dont feel your the only one, at work in about 5 weeks the "boys" have managed to do some serious driveline damge to the new Evo X's we got.

 

[VR-4Squid]

You run a 3.909 driveline then i assume?

Dont worry mate, dont feel your the only one, at work in about 5 weeks the "boys" have managed to do some serious driveline damge to the new Evo X's we got.

nope, 3.545 - it's from an early (non-evo0) RS vr4.