The one with four neat tacks in the corners of each spider gear?

ive seen a pic on here of the whole centre welded up.

Cheers mate :)
Question- are h145's out of sunnys, 120y's 1000's etc?
And i firmly believe that a h145 can take the power of an a14 or a15 pretty well if you dont hammer it too hard. Also you can arc weld them up, just as long as your using alot of amps, im talking 4mm rods with about 160 amps or probably more. That would only be a last resort, try find someone in the no with a MIG and know what there doing.

im wondering when i brake hard the left rear locks up before the drivers side, this just could be a little adjustment problem but also the ute leans to the drivers side due to my fat ass,
but a locked diff would helf in the braking too?

another question why is the driver, fuel tank and battery all on the one side?

Get hold of a good gas mig around 200amps is good you need to penetrate both gears and housing, cover ring gear and pinion, stuff something down inplace of axles to keep spline clean, weld the spiders together and spiders to housing, weld all that solid taking time and alowing to cool a lot, make 2 matchbox sized plates out of 15mm plate, grind the bottoms out so they fit sqaure over the welded gears and weld all around to make it all solid. that way nothing moves nothing cracks.

And do not quench it in water, just let it cool, this may take a while as the diff centre will get quite hot. If you do choose to quench it, it could weaken the weld and therfore have a high chance of breaking the welds. Another thing, i might be going over the top here naming things but this is a common mistake by most, they weld up there diffs, and put bad quality oil in them and there diffs get hot and shatter the crown wheel. Be sure to put some good quality gear oil in. Cheers mate

http://datsun1200.com/modules/myalbum/photo.php?lid=21910

dose this work well? have u had any thing go wrong?

yea thats the picture.
what kind of diff oil are we talking?????

The things welded as tough as nails, I let it cool for 20 mins then put it in a bucket of oil overnight, welded another 4.1 the same way, cleaned it and used castrol syntrax 75w, no issues with it at all quiet as a mouse cant even hear it except for skip skip skip as the tyres scuff around the pits haha.

mines started whirring when i back off acceleration. what would this be an indicator of?