Does anyone out there know the correct way to install lowering blocks under a GM Rear. I had blocks put under my car and it raised the car up two inches clearly there is something wrong.
I hope I get this right, The block is on top of the spring. I thought the block went in at the shock plate. I'm I wrong with this?
Damn, Pokey for a guy that " Built 12 cars and modified 5" this should be pretty simple ! Your block goes between the axle tube and leaf spring, then clamp em together with some longer ubolts. Finish up with new shocks if needed. edit: kerrynzl beat me too it.^^ That pic pretty much sums it up.
Put the car up level on jack stands. You should pull 1 u-bolt out on one side, put in the 2" longer u-bolt and start a nut on the end. with the frame on jack stands, use a jack to support the axle on the side you are working on. remove the second, original u-bolt. now, use the jack to make room for the lowering block. put in the block and second u bolt. lower the jack to rest the axle on the block. finish installing the u bolts. the shock should be fine, as the location of the spring doesn't change. It would be a good time to replace worn shocks though.
Sounds like you have done ths before No you did not hurt my feelings. I have restored a bunch of cars however I have never tried to lower any of them. That pic makes things simple. In the beginning I did just what is in the pic. The car raised up 2 inches This is what I don't understand. I had 3 inche lowering blocks under the car. I got some Posies slider springs which were suppoed to lower the car 2 inches. I had them installed. the car was just a bit to high so I got an 1 inche block and a 2 degree shim. This threw the drive shaft angle off( you can see its pointed downward and it raised the car up( why do they call them lowering blocks) This is why I think I have done something wrong. Now I had the guy remove the block, he left the shim in and the car is at the same ride height. I am going to the garage tomorrow I will take some pic's
If you put the blocks on top of the springs and under the rear end it has to lower the car. It is dropping the springs down the thickness of the blocks and therefore lowering the car. I put 2" blocks on my Galaxie and it did just as advertised. This is mine.
definitely sounds like your shackles are flipped down and raising the car...look and see if they are...if so jack it back up take a bar and flip them back up where they belong
That actually makes sense. When I put new shackle bushings in my car the shackle got flipped on one side and my car sat crooked.
OK GUY'S i GOT SOME PIC'S i WANT YOU TO LOOK AT HOW i HAVE THE SHIM, THIS IS WHERE i HAD THE BLOCK. tHE SHACKLE WAS AND IS FLIP BACK(GOOD POINT) WHEN WE FIRST DID THE SPRINGS THEY WERE FLIPED DOWN. i WOULD ALSO LIKE YOU GUY'S TO LOOK AT THE PINUON ANGLE. cAN YOU SEE THE SHIM LOOK VERY CLOSE.
cOULD MY PROBLEM BE THAT i HAVE TWO MANY LEAFS AND MY SPRING? tHIS IS WHY THE BLOCKS DID NOT EFFECT THE HEIGHT?
The shock!if the shock is extended all the way it will not let the bdy drop. I need some longer shocks how can I orderthem?
The shocks shouldn't have to be changed. You're just raising the axle on the blocks, not changing the distance between the shock mount plates and the frame. Blocks between axle and spring, if the spring is below the axle, has to work. How could it not??
Your axle stays at the same height but your body drops the same amount as the blocks. So the shock will too long. Been there, done that.
This only holds true if the shock is attached to the axle. In the case that it is attached to the u-bolt plate, as is the case with the person posing the question, then the lower shock mount goes down too. In that case, the shock geometry does not change.
I had a chevy on jackstands for a long time. When i put back on pavement it was about 4" high. It took a few days of driving and it wound up at regular stance. Springs were not sloppy but i still don't know why it did that.
WHAAAAT!!!! The shocks are mounted to the bottom spring plate! When the spring gets lowered so does the body [by the same amount ]so the shocks remain the same length The springs and shackles, spring plate etc are totally unchanged The number of leaves is irrelevent. All you're doing is moving the axle UP under the car a bit more [ which effectively lowers the car ] If your shackles flip, thats piss-poor-mechanical-ability ,not the lowering blocks fault Be careful you don't lower it too much, the diff might scape over bumps! [ Sarcasm totally intended to offend ]
Now im confused .If the shocks are attached to the spring plate then the same shocks should work.I have never had a problem with the length of the shocks after adding lowering blocks ...
Don't be confused, you've never had a problem. Read my last comment, and look at the photo I posted on this thread. On some rear-ends [ usually Pom **** , or coil rear-ends converted to leaf springs] the lower shock mount is on the diff housing not the spring plate This will require a shorter shock when lowering [ or a shock mount spring plate ] Google Image "lowering blocks"
Got ya .Fortunatley all the ones i have installed used shock studs made on the spring plates.If the shocks are mounted on the housing i can see how the shocks would be too long after the blocks ...
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