Checking Driveling Vibration & Calculating It.

[Port&PolishMan]

Looking at these Numbers - allows - No Pinion Wrap Up . .

1. Eng. Trans . 3 Degrees Down ( Correction ) 3.3 Degrees Down !
2. 1st Drive Shaft Driven - Trig. Out the Angle to be 4.854 Degrees .
3. 2 sec. Drive Shaft Driven Trig. Angle to be 3.75
4. Rear Diff. Total = 3 Degrees Down.

Equals Operating Angles of :

Operating Angles of : 1st 1.55
2nd 1.1
3rd .75


Then Also :
*Taking into Acct. say 1 Degree ( Wrap Up ) for 1 ton Springs*

Looks like a Need to move Pinion at Least 1.0 Degree Down in Front . .
Or Add 1 Degree Shim to the ( Leaf Spring Perch ) - making Total Pinion = 2.0 Degrees Down
But the Operating Angle of 1.75 Degrees . .

Running down Road - I'd get . .

1st Operating 1.55
2nd Operating 1.10
3rd. Angle 1.25 Degree - which would allow approx .65 Degree Wrap Up .. Operating Angle of 1.75 Degrees

Hope I have this Sorted Out Now - Anyone Say ?
Corrected Type -O

[Port&PolishMan]

An another Easy Step is Checking Phasing of the Joints & Slip Yokes ..

Made Even Easier with Smart Apps for all Your Smart Phonies .

`\ : - )

Like : Inclinator Pro $2.99 . .

[Keith Seymore]

Originally Posted by Port&PolishMan

Also Found 1 Bad Tire and Rim - Inside on Dual Shot .. 5/8 inch - side to side
1/4 Up & Down . . that certainly does help ..

Can you remind me what type of vehicle this is? Do I remember you saying this was a dump truck?

And can you also remind me what the original complaint was (ie, bad vibration at speed)?

Originally Posted by Port&PolishMan

Running down the road I'd get...

1st Operating 1.55
2nd Operating 1.10
3rd. Angle 1.25 Degree - which would allow approx .65 Degree Wrap Up .. Operating Angle of 1.75 Degrees

Those angles look better. With a one-ton vehicle you may not get very much spring wrap at all.

Originally Posted by Port&PolishMan

2. 1st Drive Shaft Driven - Trig. Out the Angle to be 4.854 Degrees .
3. 2 sec. Drive Shaft Driven Trig. Angle to be 3.75

Why are you "trig'ing" these out when they can be measured directly?

Originally Posted by Port&PolishMan

Rear Diff. Total = 3 Degrees Down.
4. Rear Diff. Total = 3 Degrees Down.

"Down" relative to what? The rear shaft or the ground?

K

[Port&PolishMan]

1954 1 Ton - has - Hoist , Stake _Dump - Dual

Mostly used for Grain & Feed - 50 yrs.

Not suppose to be much _ Over All Mileage on it .. ?

The Inclinator was used to double check Results , there were
Small Variations ,( My Garage isn't Level with the World . )
LOL - just Kidding . .

so Checked ..again and Found a Type - O in My Post .

Yes, there are still Wheel Issues .. But just - Changing Rear Gear Oil
made a Difference in Vibration .. - which looked like Sludge from a Sewer .
Oh Joy !

Still there just - Not - as Crazy Amped - now it's just Big Time .


* Angles
Down as to Zero Point - V Cup = 1.25 Operating . .

Vibration does seem ( Feel to It ) to be ( Twice the Speed of the Wheels )

See If I'm able to get You a Video . .

[Keith Seymore]

Originally Posted by Port&PolishMan

Small Variations ,( My Garage isn't Level with the World . )

Doesn't matter; the angles are relative to the driveline components, not the world.

Originally Posted by Port&PolishMan

Vibration does seem ( Feel to It ) to be ( Twice the Speed of the Wheels )

Not twice the speed of the wheels; twice the speed of the driveshaft (or 2x engine rpm for a 1:1 transmission high gear ratio).

K

[Port&PolishMan]

My Garage ..LOL - just Kidding .

After Topping Up the Rear - Gear , I Drained it and Flushed it some - Lighter Oil 30W - till it came out
Much Cleaner , then Flushed with Fresh 80W90 - to Clear thew 30W - then Topped it up Full this Time . .

Tried to Count the Vibrations - Compared to Second - leaning toward 10X
Fast Vibration around @ 42 Mph - it feels like it's going 5X - 10X - The Wheels ..

I should Test a New U-Joint , also .. Link show Movement & Sound .

https://youtu.be/q-nLTHzsv8c

[Port&PolishMan]

Checking U-Joint Caps - much easier with App .

Much _ Easier with Smart Apps for all Your Smart Phonies .

`\ : - ) Like : Inclinator Pro $2.99 . .


Another Very Good Source :

https://www.youtube.com/watch?v=dAqAqODmcj4

[Keith Seymore]

Originally Posted by Port&PolishMan

Checking U-Joint Caps - much easier with App .

Much _ Easier with Smart Apps for all Your Smart Phonies .

`\ : - ) Like : Inclinator Pro $2.99 . .


Another Very Good Source :

https://www.youtube.com/watch?v=dAqAqODmcj4

I think you may have attached the wrong link. This one is relative to setting up a ring and pinion.

K

[Port&PolishMan]

Yes, I'm Linking in Info to the Drive Line Thread , so it will be available in 1 Spot , sorta Speak .

Apps - are to anyone's Taste and there are Plenty !
I Happen to use the in Tn Orange - Apple

Like this Link for Joints :
http://www.therangerstation.com/Maga...08/ujoints.htm