Norwood

[DaleTx]

Originally Posted by Sieg

Roy Differential's called today about noon, I saw the caller ID and though oh sh*t something is not good. Wrong, rear end was ready to go. So off to the shop to pick it up I went and stopped by Coyote Steel and picked up some scrap aluminum to fab new lowering blocks with a 5* pinion correction.



All that's left is to connect the brake line and u-joint, bleed the system, mount the wheels and break it in.

I could be way off here but it looks like your wedge may be in backwards. The axle looks like it is pointed up in the front rather than down.

I went out and took a picture of mine. The wedge on mine is set up so the front of the axle is pointed down.... the opposite of what I see in your picture. The narrow gap between the leaf spring mount plate and axle is towards the front of the car on my car... on your car the narrow gap is towards the back of the car.

Just an observation... maybe something to check.

Here is a pic of mine with the narrow gap towards the front of the car... which makes the front of the axle point down.

[intocarss]

^^^ It does look like it's the opposite of yours Dale

[Sieg]

Originally Posted by GregWeld

But you did more than just the rear end -- you also added wheel studs... have you looked at that at all?

Didn't redrill holes just tapped the existing. Wheels mounted up fine.

[Sieg]

Originally Posted by intocarss

Is the DS seated properly in the yoke?

Originally Posted by 4mul8ion

Any possibility of the U joint not seating correctly in the axle flange or the pinion flange not seating correctly on the new gearset?

One check to consider is to measure how much runout is on the driveshaft near the rear axle pinion flange, the center and near the front slip yoke end.

I had paint marks on both so they are indexed the same.

Runout might be interesting thanks.

Damn I wish I had a drive-on ramp right now........or even wheel stands!

[Sieg]

Originally Posted by DaleTx

I could be way off here but it looks like your wedge may be in backwards. The axle looks like it is pointed up in the front rather than down.

I went out and took a picture of mine. The wedge on mine is set up so the front of the axle is pointed down.... the opposite of what I see in your picture. The narrow gap between the leaf spring mount plate and axle is towards the front of the car on my car... on your car the narrow gap is towards the back of the car.

Just an observation... maybe something to check.

Here is a pic of mine with the narrow gap towards the front of the car... which makes the front of the axle point down.

Reversing the wedges was the first thing I thought, went through my images to confirm earlier today and this is how it was.



I'm not saying this is right but thats where we ended up when installing the trans with a drive on lift so I could determine the best angles given the setup.

What bothers me is I made three 1* changes and there was no noticeable change.

Realistically the biggest change from my baseline was the ring and pinion and new bearings.

I'll check with Roy who did the setup in the morning and see what he thinks.

[intocarss]

Is the shim installed with the tapper towards the front of the car?? The yoke on the rear end should face down I'm thinking at least -3*..And the u joint is sitting all the way in the pocket (nice that you marked it)

[Sieg]

Originally Posted by intocarss

Is the shim installed with the tapper towards the front of the car?? and the u joint is sitting all the way in the pocket (nice that you marked it)

No. The driveline is near parallel to the ground in this car. Engine/trans is 2.25* downward.

I've got the routine down now so I can try zero wedge and 2* & 4* opposite of what I have and see what happens.

Regretfull I don't have a convenient way to take accurate driveline measurements at this time.

I'm wondering if changing out the rear shackle bushings to urethane impacted the angles? Or if the shackles are too tight restricting movement. They're torqued to 10 ft lbs. ??? Travel felt OK, turn-in and cornering stability definitely improved.

[Sieg]

Here's the info I used to set angles when I installed the T56:
http://www.iedls.com/asp/admin/getFi...&TID=28&FN=PDF
I used the example in Figure 5

I'm wondering if the urethane bushings I installed in the rear shackles at the same time are too tight and binding thus effecting the pinion angle. I torqued the uppers at 5 lbs, could get the torque wrench on the lowers so they're by feel.

[GregWeld]

Originally Posted by GregWeld

Pinion nose is DOWN right??

Yes -- should have been is NOT down....

[GregWeld]

A driveline will feel like it's a rotational vibration -- kind of moving "around" the car...

Tires out of balance feel more like a "bouncing" vibration...

A bent wheel feels like a side to side vibration... or shaking side to side.


What we don't know is what kind of vibration you're feeling???