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Old 05-22-2020, 06:58 AM
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Originally Posted by rod cole View Post
If it were mine at 3,89 down on trans I would start at 2 dgrees up at the rear end pointing up . again the driveshaft angle is whatever it ends up at once you acheive parallel. .My car the rear yoke is considerable higher than trans so the angle on the shaft is wonky but runs smooth to 125 mph
That really cleared this up for me rod. Thanks for the video. He said to match the angle with the input and out put . Thats the part that gets me alittle confused. Because right now the rear is at 0 and the trans is at 3.85. Would turning the rear to 3.85 be the way to go because at 2 up im still 1.85 away from a match right? He said with in 1 degree..

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Old 05-22-2020, 08:51 AM
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Are you using an inclinometer?



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  #23  
Old 05-22-2020, 10:25 AM
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Originally Posted by charlie66 View Post
That really cleared this up for me rod. Thanks for the video. He said to match the angle with the input and out put . Thats the part that gets me alittle confused. Because right now the rear is at 0 and the trans is at 3.85. Would turning the rear to 3.85 be the way to go because at 2 up im still 1.85 away from a match right? He said with in 1 degree..
If the person advising you about the set-up wants the pinion yoke to be within 1 degree of the trans (which assumes a 1 degree change under load) then your pinion should be 2.85 degrees up if your trans is 3.85 degrees down.

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Old 05-22-2020, 11:08 AM
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I do not know how much deflection is in the mounting points of the rear end you have the stiffer the points the closer to exactly the same it can be. Stock rubber moves more than heim joints. parralel under load is all you are after .

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Old 05-22-2020, 01:00 PM
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Originally Posted by johnta1 View Post
Are you using an inclinometer?


Its a digital angle finder.

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Old 05-22-2020, 01:14 PM
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Originally Posted by AG View Post
If the person advising you about the set-up wants the pinion yoke to be within 1 degree of the trans (which assumes a 1 degree change under load) then your pinion should be 2.85 degrees up if your trans is 3.85 degrees down.
No one is really advising me. Im going off of whats out there on the web. I have all polyurethane bushings and poly tranny mount. Ive done the under the car camara and there seems to be no noticable movement.

I raised the trans up today 1/2" . Now the trans angle is -3.15 and shaft is -1.80 so that comes out to 1.35 . Rear yoke is -.55 drive shaft is 1.80 = 1.25 .So thats close to parallel as thats what i think the video was saying to go for right?

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Old 05-22-2020, 01:15 PM
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Quote:
Originally Posted by rod cole View Post
I do not know how much deflection is in the mounting points of the rear end you have the stiffer the points the closer to exactly the same it can be. Stock rubber moves more than heim joints. parralel under load is all you are after .
I have all polyurethane.

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  #28  
Old 05-22-2020, 01:22 PM
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Just so everyone knows. Im using this calculator for all my settings.



https://spicerparts.com/calculators/...gle-calculator

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Old 05-22-2020, 01:38 PM
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Quote:
Originally Posted by charlie66 View Post
No one is really advising me. Im going off of whats out there on the web. I have all polyurethane bushings and poly tranny mount. Ive done the under the car camara and there seems to be no noticable movement.

I raised the trans up today 1/2" . Now the trans angle is -3.15 and shaft is -1.80 so that comes out to 1.35 . Rear yoke is -.55 drive shaft is 1.80 = 1.25 .So thats close to parallel as thats what i think the video was saying to go for right?
The trans and rear yoke are all that's used in the measurement, not the driveshaft. Trans is -3.15, yoke is -0.55, pinion angle is -3.70. Shoot for a between +1-2 degrees (up) on the yoke and you should be good. If it's an A-body then adjust your upper control arms for the correct yoke angle.

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  #30  
Old 05-22-2020, 02:50 PM
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Quote:
Originally Posted by AG View Post
The trans and rear yoke are all that's used in the measurement, not the driveshaft. Trans is -3.15, yoke is -0.55, pinion angle is -3.70. Shoot for a between +1-2 degrees (up) on the yoke and you should be good. If it's an A-body then adjust your upper control arms for the correct yoke angle.
You know whats happening is,for some reason im having a problem with getting the passenger side bolt back in on the ear the more i lengthen it . So far its out 4 turns more then i had it. Seems like for every full turn its worth a half of a degree. Also now that i shimed up the tail a 1/2" the pan is hitting the damn center link . It used to rub just a touch but now its rubbing .. One thing effects the other type thing now.. haha..

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Old 05-22-2020, 03:54 PM
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https://youtu.be/Yss6Uf3AwNM
Here's a link to a pro chassis builder visually showing what i was telling you about. There's a whole series he does thats very informative.

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  #32  
Old 05-22-2020, 04:08 PM
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Quote:
Originally Posted by Scott65 View Post
https://youtu.be/Yss6Uf3AwNM
Here's a link to a pro chassis builder visually showing what i was telling you about. There's a whole series he does thats very informative.
Ive seen that video Scott.

But thank you

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Old 05-22-2020, 04:08 PM
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Quote:
Originally Posted by Scott65 View Post
https://youtu.be/Yss6Uf3AwNM
Here's a link to a pro chassis builder visually showing what i was telling you about. There's a whole series he does thats very informative.
If you haven't seen it you need to watch his rant on Chinese parts Lol

  #34  
Old 05-22-2020, 04:22 PM
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Originally Posted by 535 tall deck View Post
If you haven't seen it you need to watch his rant on Chinese parts Lol
yeah, that was pretty good

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  #35  
Old 05-22-2020, 04:27 PM
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Originally Posted by charlie66 View Post
Ive seen that video Scott.

But thank you
No problem. FWIW, that method has served me well for 30 plus years.(without the cool tool and chassis tables/Jack's, I use and have forever, an old craftsman magnetic protractor) I've watched your perseverance here for a long time. There's no doubt you'll get it worked out. Good luck

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'65 Tempest 467 3650# 11.30@120.31

Last edited by Scott65; 05-22-2020 at 04:31 PM. Reason: Addition
  #36  
Old 05-22-2020, 04:36 PM
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The best video I saw on youtube and easiest to follow was How to set Pinion Angle by Team Z Motorsports.

  #37  
Old 05-22-2020, 08:30 PM
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Quote:
Originally Posted by Scott65 View Post
No problem. FWIW, that method has served me well for 30 plus years.(without the cool tool and chassis tables/Jack's, I use and have forever, an old craftsman magnetic protractor) I've watched your perseverance here for a long time. There's no doubt you'll get it worked out. Good luck
Thanks Scott, this car really is wearing me out though..

In that video he takes the rear yokes number of degrees and adds it to the drive shaft angle right? Or am i wrong about this?

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Old 05-22-2020, 08:58 PM
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I don't think he's adding due to his reset to zero function, he doesn't have to. You want the angle to be a very slight V looking from the side. Pinion down towards the ground relative to the driveshaft(negative). Go back and watch Tim's video, paying special attention to his explanation using the "V". If your inclinometer doesn't have the reset zero function like his, then just keep in mind the "V" scenario he lays out. He shows how he tips the tool to verify which direction brings it to zero, and which way its leaning.
Edited to add: if your pinion yoke isn't machined like the one he shows, Ive used a socket that fits the bearing cap to put the measuring tool on to make sure its flat and accurate.

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'65 Tempest 467 3650# 11.30@120.31

Last edited by Scott65; 05-22-2020 at 09:02 PM. Reason: Addition
  #39  
Old 05-22-2020, 09:21 PM
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The drive shaft is not part of the equation. In a from scratch dragcar it can be but not with what you are doing. Hang the angle finder on the tail housing or yoke get reading [-3.15 now or take shims out -3.75] now take agle finder to rear end hang on yoke or u joint cap rear end side get plus 3.15 or 3.75 done. This is weight on the suspension not hanging in air

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