Pinion angle question

-
Speaking of blocks, dont use cinder blocks!!
Someone somewhere knows of a guy that passed away from a block collapsing.
Wood blocks or solid cement blocks.
 
Speaking of blocks, dont use cinder blocks!!
Someone somewhere knows of a guy that passed away from a block collapsing.
Wood blocks or solid cement blocks.
I have a 01 ram I had the front end up with cinder blocks and left it for a couple days and they collapsed and the truck fell luckily it was overnight and I wasnt under it. It really made me think tho! I have done that alot I mean alot! The dart is on cinder blocks now luckily I have them turned with the holes down but I dont like being under it still tho
 
Ok I got the original rear end up and checked this is really confusing me. If I place the arches down and level I'm getting like 5 to 6 degrees up with the arches up and level I'm getting like 8 to 9 degrees down? HTF is that possible? I double and triple checked and everything is level. I dont get it. I think I'm gonna meet it in the middle and weld them at like 6 degrees and call it done.

20200508_171547.jpg


20200508_171959.jpg


20200508_172013.jpg


20200508_171833.jpg


20200508_172029.jpg


20200508_172035.jpg


20200508_171611.jpg
 
Speaking of blocks, dont use cinder blocks!!
Someone somewhere knows of a guy that passed away from a block collapsing.
Wood blocks or solid cement blocks.

We're only talking about him putting the rear axle only on the cinder blocks. They are plenty substantial to hold that up.
 
Ok I got the original rear end up and checked this is really confusing me. If I place the arches down and level I'm getting like 5 to 6 degrees up with the arches up and level I'm getting like 8 to 9 degrees down? HTF is that possible? I double and triple checked and everything is level. I dont get it. I think I'm gonna meet it in the middle and weld them at like 6 degrees and call it done.

View attachment 1715524330

View attachment 1715524331

View attachment 1715524332

View attachment 1715524333

View attachment 1715524334

View attachment 1715524335

View attachment 1715524336

Totally *** backwards of how I suggested.
 
Huh? How ? I thought that's what you told me to do?

I didn't suggest you do it upside down. It needs to be measured just like it sits in the car. And clean them perches up. You got enough rust all over those to affect the measured reading. lol
 
I didn't suggest you do it upside down. It needs to be measured just like it sits in the car. And clean them perches up. You got enough rust all over those to affect the measured reading. lol
Yea I know I did it both ways and got two different readings that is what is confusing me. Shouldn't it be the same both ways?
 
Yea I know I did it both ways and got two different readings that is what is confusing me. Shouldn't it be the same both ways?

I don't see how. For one it will be "opposite" from one way to the other, plus, you cannot depend on the "wrong side" of the perches to be anywhere near level or the same for that matter. The measuring surface is the side that rests on the sprAngs. That's the only surface you should concern yourself with. That and "wherever" you measure at the pinion.
 
I don't see how. For one it will be "opposite" from one way to the other, plus, you cannot depend on the "wrong side" of the perches to be anywhere near level or the same for that matter. The measuring surface is the side that rests on the sprAngs. That's the only surface you should concern yourself with. That and "wherever" you measure at the pinion.
Exactly I don't see how either. That's why I'm so confused about it.
 
Yea I know I did it both ways and got two different readings that is what is confusing me. Shouldn't it be the same both ways?
Then stop doing it both ways. LOL
Seriously, unless you're doing it on known level surface like a welding or frame table or the calibrated giant hunk of granite we have at work, you're going to get different readings. Best you can do is match your 8.8 to your 7.25 like it sits in the car. jmo.
 
AND use your angle finder in the same direction each time. Them things can be off from one direction to the other.
 
Exactly I don't see how either. That's why I'm so confused about it.

You're confused for all the wrong reasons. You measured from the WRONG SIDE. Measure only from the bottom of the perches, not the top. You makin this WAY harder than it really is.
 
I place an angle finder on the pinion yoke and a bubble level on the spring perches to duplicate the stock A-body dimensions.

1. Set the housing UPSIDE DOWN on jack stands. Use a floor jack under the yoke to point the pinion 5 degrees DOWNWARD (toward the ground).

2. Level the perches at 43" on center and weld.
 
I place an angle finder on the pinion yoke and a bubble level on the spring perches to duplicate the stock A-body dimensions.

1. Set the housing UPSIDE DOWN on jack stands. Use a floor jack under the yoke to point the pinion 5 degrees DOWNWARD (toward the ground).

2. Level the perches at 43" on center and weld.

That's the original way I tried to tell him to do it but he wouldn't listen. Although I didn't tell him upside down, but it would certainly work.
 
In reality, nothing needs to be level. Your simply measuring the DIFFERENCE between the perches and the pinion yoke. Leveling the perches simply makes the math easier.
 
In reality, nothing needs to be level. Your simply measuring the DIFFERENCE between the perches and the pinion yoke. Leveling the perches simply makes the math easier.

If he wants to compare to the original (and he said he did) He'd need the perches dead level to measure the pinion angle.......but he's makin this way too hard. 5* pinion up (down doing it like Cass said) and he's spot on. That's the right way to do it and too many people have muddied the waters on this thread and made him scared.
 
In reality, nothing needs to be level. Your simply measuring the DIFFERENCE between the perches and the pinion yoke. Leveling the perches simply makes the math easier.
This is what I was gonna do while the rear was still in the car I had the math all figured out but I was worried it would be off so I pulled it back out to level it up
 
If he wants to compare to the original (and he said he did) He'd need the perches dead level to measure the pinion angle.......but he's makin this way too hard. 5* pinion up (down doing it like Cass said) and he's spot on. That's the right way to do it and too many people have muddied the waters on this thread and made him scared.

I get what you're saying, but nothing needs to be level. It just makes the math easier. 1 and 6 is the same as 'level' and 5.
 
I get what you're saying, but nothing needs to be level. It just makes the math easier. 1 and 6 is the same as 'level' and 5.

You know that and I do too, but it would be easier for him to LEARN it that way. Or so I thought. He's still not done it that way yet.....and he thinks he has. lol
 
-
Back
Top