welding a 521 rear end Qs ??

[benrob]

so im goin to weld my rear end on my 521 , do i have remove the axles to get the cover of the rear end ? do i have to remove the 1 1/8 nut where the drive shaft bols up? 

[EastBay521]

take the axles out, disconnect the drive shaft and remove the 10 bolts around the 3rd member

[TENDRIL]

[ggzilla]

There's no cover on a 521 rear end.

 

You might want to get or borrow a repair manual before you start.

[thisismatt]

I take it you never have to parallel park, huh?

[datzenmike]

If you don't need to do this don't. On a turn the outside tire wants to turn faster then the inside tire but they are locked together. One or both have to slip so consider rain, snow, fine gravel or damp leaves when leaning into a tight turn. Welding the differential is known as a Lincoln Locker or a poor man's LSD and it's as dangerous as it is unpredictable. It adds understeer and in poor traction can suddenly change to severe oversteer, stresses the axles splines, wears away the rear tires. The 521 does not have enough power that you need more traction.

[Abe Froman]

Why would you want to do this, are you driving it on the street ?

[datzenmike]

Bet it's 'to go driftin' yo'. Safer to put smaller tires on it.

[wayno]

If you weld it like this, you will have no issues at all, you will not have to worry about understeer or oversteer, you will even be able to leave the keys in it, all I ask is that you put a camera pointed straight at the drivers seat so we can all see the reaction of the thief when he tries to steal it.

[mrbigtanker]

In before the lock.

[banzai510(hainz)]

why dont you get a Phantom Grip set up and tell us How  it works

 

http://www.phantomgrip.com/category-s/1848.htm

  so if you dont like it you can always take it out. and go back to stock since Mass will not have alot of spare axles in the junkyard there to find another if you need it.

[NITRQ]

 

 

Like so but please but some power behind it first 

 

[ggzilla]

It wont differentiate now. Poor mans LSD.

[Rocket Dog]

I don't get it.  What does welding the rear end do? 

[datzenmike]

An open diff will allow the two tires to turn at different speeds which is handy on corners where the outside wheel travels farther than the inside wheel. A draw back is that under poor traction conditions the tire with the least traction will spin the easiest. A clutch LSD allows the tires to be locked together but on turns the tire traction overcomes the clutch forces inside and they slip, allowing the tires to rotate at different speeds. In poor traction like snow and mud the LCD provides some rotational forces to both tires.

 

A welded differential locks both tires together. On a turn, the tire with the most traction will force the other tire to speed up or slow down or break traction with the road. Usually on a corner, vehicle weight will shift to the outside tire which has to travel further than the inside tire. Because they are welded together the inside tire is forced to turn faster and spin. Now the outside tire is the only one on the back that is holding the car on the road. The inside one is spinning on a layer of burning rubber. This can cause the outside tire to suddenly break loose itself and begin spinning if any power is applied or if the tire travels over wet leaves, dust or gravel a bump or any lessening of tire traction. Welded differentials are unpredictable and anyone who suggests they just need to be driven differently has been either lucky or hasn't driven it long enough.

 

A welded differential would work perfect for driving straight ahead like a drag race, but it you get sideways look out! Check out some drag race crashes and see what happens when a car gets slightly sideways. They are extremely hard to get the rear end straightened out again.

[ggzilla]

I don't get it. What does welding the rear end do?

You've heard of Limited Slip? Welding makes it No Slip. Great for the drag strip. Not good for the street as it won't differentiate when turning corners. You can still drive it on the street but the tires will scrub.

[oldskoolvws]

One of my boys wound up taking his 77 Toyota Mini through a fence on a turn because of this. Not a good idea for a driver car.