hey guys what do you tell me about welding my diff so it can be possy is this a good idea? some mecanics told me that is ok but some have told me that is not a good idea what is your opinion about this?

do a search for welding a diff....you will find most peoples opinion. its been covered atleast once or twice

wow thanks a lot i have found a lot of info here and in google i want to do this so i can do drifting in my ute :)

hey and what about lsd is that chaep? and where i can get one?

Is this your daily driver or a race only car? If you use this daily, & drift it on weekends, then a LSD is what I recommend. Welding the diff is doable, but changes the way a car drives.
What diff are you using? Is it a H145 or H165 Japanese diff, or something else. I was looking at the Pitroad site the other day & it seems Nismo isnt making LSD's for either any more. Maybe some American companies can offer an LSD to suit. A friend of mine here in Australia got an LSD for a H165 from America in the late 90's, so maybe someone there has something to suit. A TRD LSD for a AE86 might be modified to fit. One of the members on this site called Topgear makes them as well, maybe an email to him might get you some information. LSD's aren't cheap, unless you're running something like a ford 9 inch behind that rotary, when a trip to a wreckers might find something.

A Nismo H165 LSD will cost you about $2000 (Australian dollars) second hand out of Japan.

im using the stock diff i think is te H145 is a daily car and i drift it on weekends just for fun but dont drive it to fast well i think 2000 AUSD is expensive for me maybe getting another diff to weld it is more chep and if i dont like it i can put back the other one again

If you're running the H145 you'll break the axles the first time you give it a serve. Seen it happen here in Australia, the worst case ended up with the car driving into a sandstone wall. Ouch.
The later utes came stock with a H165, what year is yours? It looks to be LHD, from the placement of the wipers in the picture, I don't know when they started making utes that way. Could you measure the diameter of the diff centre, I have a few centres I can then measure as a comparison. If it's the later centre, just get another centre & weld it up, swap it in & see if you don't mind the disadvantages. If it's annoying you, swap the 2 centres. I'd try & avoid making it difficult to revert to the normal diff by welding it, you can't unweld it if you don't like it. I've run welded diffs in my race cars, & sometimes on the street, but the first time I tried to coast into the driveway quietly & the rear end locked up, I decided against it.

fwiw - drifting is the one place where i actually think a completely locked diff would be an advantage over an lsd. It will see more corner entry understeer in a circuit racer, but you'd be driving it somewhat differently, not trying to get the fastest corner exit speed (which is the goal of the racer) but to get it sideways early, so you'd essentially be hitting the handbrake and or nailing the throttle a hell of a lot earlier, and the minute you _want_ to throw the rear end loose on a corner, having both wheels fully locked to one another is an advantage, as no matter what you do, at least one will be losing grip even without much throttle application (if you get my drift - basically what 'helps' traction with a locked diff in a straight line/drag race, also 'helps' it lose traction around a corner, at least on one tyre)

I do agree I don't think a h145 would last.

On the street however - the ute is probably lighter than it wants to be over the rears, and the corner entry understeer you get with a locked diff, well when you apply any throttle, it wants to snap the rear out. Good for drifting, not so hot on the street, to the point of downright dangerous in the wet, the pre-disposition for the rear to step out (violently) is huge. There ARE drivers out there that could handle it in their sleep (Walter Rohl comes to mind) but not everyone. If you are going to do it, try it in the wet in some factory area after everyone has gone home, and find it's limits (and your limits too!) and if it feels too unpredictable, abandon the idea. You can always swap the diff centres over for drifting, and back again when you get home, sure it's an hour or so labour, and gasket and oil, but less of a financial loss than writing off the car (or someone elses)

iv been absolutelly thrashing my 1000 with a stock diff (h145 i think) for over 1 year and i have never stripped an axle also im runnin an a15 too the diff started to give after the first 2 months but thats only because i didnt weld it propperly the first time as i didnt kno wot i was doin at the time so then i welded it properly and no worries since