mark_uss

hellou . i`ve decided to make some modification to a gearbox of a 944 early model to test on the car ... we welded the diferential so it will spin evenly on the both sides ..what can go wrong did somebody did it before?..car is a 84 944

ZR8ED

I've run a welded diff before (not a porsche.) At slow speeds its harder to turn the car (parking lot stuff) When ever you are turning at all, you are always dragging one wheel, so expect extra wear on your tires, and extra strain on your cv shafts etc. On the track, it sure did put the power down on corner exits compared to an open diff. I went through half shafts much quicker, but they were easy/cheap to do.

All in all, it works, but has several drawbacks..not the BEST way to do it.

V2Rocket

good thing is that if it busts its cheap to replace..

Potomac-Greg

On a racer, a locked diff makes a car understeer. And it will be a handful if it's wet.

M758

Bad understeer. Plus the weld can break taking out the R&P. Not as good as a proper LSD box. Still can be fast at the track.

Tayloray

drift!

mark_uss

i will post videos..on the drift thingh) after that i will replace the gearbox with the one i currently run . should be fun

mark_uss

any advice on a set up for suspension set for a daily driver?

drift a 944

I am running a welded diff on one of my cars. My experience is that it puts a lot of strain on all the other parts, especially as a daily driver. I feel like my CV axles are going to twist and snap one day.
Also just as others have already said, it will make the car understeer in higher speed driving conditions, but oversteer in wet conditions. The handling characteristics are really downgraded after welding the diff, in my opinion.

But since I really only use the car for drifting events anyway, it is highly beneficial.

n_hall

i've been told you can't weld a 944 diff. i guess because it's a transaxle and not a "normal" diff. interesting though.

drift a 944

it can be done but the the differential needs to be removed from the transaxle in order to weld it. It is still a "normal" type of differential just in a bigger case and also requires removing the transmission half from to access.

M758

Yes it can be welded. The diff is just like any other diff. It just happens to be in gearbox.

I would not even consider welding a diff for a street car.

V2Rocket

where did you actually do the welding? on the spider gears?

M758

I have never done it... but that is what you do.

mark_uss

i`m soory i did`t take pics on the weld itself...but i will do some drifts and some runs for fun ....look for damage ..will see..