Pinion Angle - here we go....
#973465
04/14/11 11:59 PM
04/14/11 11:59 PM
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Joined: Jul 2004
Posts: 4,384 Worst Weather USA
493_DART
OP
master
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OP
master
Joined: Jul 2004
Posts: 4,384
Worst Weather USA
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I find this confusing because there are 8 different methods/opinions on the subject .
SO--lets try a new approach. Im going to post my measurements and lets see if everyone comes up with the same number in the end .
Here we go:
d-shaft at rear angle 86 degrees (4 ? ) DOWN measured on bottom of shaft. D shaft is pointed down at rear.
pinion flange 81 degrees (9 ? ) DOWN vertically measured . pinion is pointing down .
trans seal - measured vertically 88 degrees (2?) UP .
pinion yoke (u joint cap) 5 degrees DOWN
so ... what is my pinion angle ?
Last edited by 493_DART; 04/15/11 01:52 AM.
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Re: Pinion Angle - here we go....
[Re: 493_DART]
#973468
04/15/11 12:22 AM
04/15/11 12:22 AM
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Joined: Nov 2010
Posts: 1,397 Carson City, Nevada
Biginchmopar
pro stock
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pro stock
Joined: Nov 2010
Posts: 1,397
Carson City, Nevada
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Well, I hate to tell you this but lets start over. 1.) Get the car up in the air with the car supported on the rear axle and the front supported around the front suspention. 2.) Take the driveline off the pinion yoke. 3.) Measure the angle on the pinion yoke were the caps bolt to. 4.) This should give you a measurement with the needle on one side of 90* towards the front of the car or towards the back of the car. Record it. 5.) Put the driveline back on 6.) Now put the tool on the bottom of the driveline and take another measurement. Again it should be on one side or the other of the 90* mark toward the front or back of the car. Record it. 7.) Now that all that is done if one measurement is 4* toward the back and the other is 2* toward the front your pinion angle would be 6*. 8.) If they are both the same way (toward the back) 4* and 2* then your pinion angle is 2*. Hope all this helps!
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Re: Pinion Angle - here we go....
[Re: MR_P_BODY]
#973470
04/15/11 12:26 AM
04/15/11 12:26 AM
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Joined: Nov 2009
Posts: 3,082 St. Paul , Mn.
tubtar
master
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master
Joined: Nov 2009
Posts: 3,082
St. Paul , Mn.
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Fear wasn't enough to keep me from clicking on this. I wish I could help , but I am struggling to decipher your angles and how they relate to flat level ground. There seems to be an information overload. You can get the pinion angle from the tail shaft and pinion yoke angles alone..........yes ? Or maybe I am more confused than you are.
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Re: Pinion Angle - here we go....
[Re: tubtar]
#973473
04/15/11 12:35 AM
04/15/11 12:35 AM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Fear wasn't enough to keep me from clicking on this. I wish I could help , but I am struggling to decipher your angles and how they relate to flat level ground. There seems to be an information overload. You can get the pinion angle from the tail shaft and pinion yoke angles alone..........yes ? Or maybe I am more confused than you are.
2 theories ... one uses pinion and trans the other uses pinion and drive shaft... now days I just ask which answer would you like... I dont care to get into all the BS... I happen to use the drive shaft but when I built the car I put the trans on centerline with the pinion
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Re: Pinion Angle - here we go....
[Re: Biginchmopar]
#973475
04/15/11 02:09 AM
04/15/11 02:09 AM
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Joined: Jul 2004
Posts: 4,384 Worst Weather USA
493_DART
OP
master
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OP
master
Joined: Jul 2004
Posts: 4,384
Worst Weather USA
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Quote:
Well, I hate to tell you this but lets start over. 1.) Get the car up in the air with the car supported on the rear axle and the front supported around the front suspention. 2.) Take the driveline off the pinion yoke. 3.) Measure the angle on the pinion yoke were the caps bolt to. 4.) This should give you a measurement with the needle on one side of 90* towards the front of the car or towards the back of the car. Record it. 5.) Put the driveline back on 6.) Now put the tool on the bottom of the driveline and take another measurement. Again it should be on one side or the other of the 90* mark toward the front or back of the car. Record it. 7.) Now that all that is done if one measurement is 4* toward the back and the other is 2* toward the front your pinion angle would be 6*. 8.) If they are both the same way (toward the back) 4* and 2* then your pinion angle is 2*.
Hope all this helps!
ok on the rear yoke its 80 needle pointing to the rear
on the D-shaft its 86 needle pointed to the front of car
this is with the car on the ground -- weight in the seat. Thats how "most" of the people say to measure.
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Re: Pinion Angle - here we go....
[Re: tubtar]
#973476
04/15/11 03:26 AM
04/15/11 03:26 AM
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Joined: Jul 2004
Posts: 4,384 Worst Weather USA
493_DART
OP
master
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OP
master
Joined: Jul 2004
Posts: 4,384
Worst Weather USA
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Quote:
Fear wasn't enough to keep me from clicking on this. I wish I could help , but I am struggling to decipher your angles and how they relate to flat level ground. There seems to be an information overload. You can get the pinion angle from the tail shaft and pinion yoke angles alone..........yes ? Or maybe I am more confused than you are.
yep-im confused -with 5 or more methods out there..
This is with me laying under the drivers side --------looks like i have pinion yoke angle at 10 degrees - the diff is REALLY pointed down at a pretty good angle.
and d-shaft angle 4 degrees --looking at it , the shaft is definitely pointing DOWN .
there is basically a V shape where the shaft meets the diff. Does this make sense ?
the reason i used the 81 or 86 numbers is the gauge only has a magnet on one side---or i could only use the gauge a certain way -- SO , 90 degrees on the gauge would be ZERO .
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Re: Pinion Angle - here we go....
[Re: 493_DART]
#973477
04/15/11 05:59 AM
04/15/11 05:59 AM
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Joined: Feb 2007
Posts: 6,295 U.S.
moparniac
master
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master
Joined: Feb 2007
Posts: 6,295
U.S.
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trans seal - measured vertically 88 degrees (2?) UP . (you can go off the balancer if you can get on it for this measurement also)
pinion yoke (u joint cap) 5 degrees DOWN
so ... what is my pinion angle ?
-3
Mopar Performance
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Re: Pinion Angle - here we go....
[Re: 493_DART]
#973478
04/15/11 08:13 AM
04/15/11 08:13 AM
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Joined: Apr 2004
Posts: 12,339 somwhere
smokinwoody
I Live Here
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I Live Here
Joined: Apr 2004
Posts: 12,339
somwhere
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HOLY SMOKERS..BATMAN... Im spittin coffee everywhere reading this one...scratch my head violently... if you're on leaf springs, I put my pinion angle down 3*...thats it... now I probably realy started something...
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Re: Pinion Angle - here we go....
[Re: smokinwoody]
#973479
04/15/11 09:42 AM
04/15/11 09:42 AM
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Joined: Mar 2003
Posts: 2,524 PA
moparacer
master
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master
Joined: Mar 2003
Posts: 2,524
PA
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Just do it according to the chart on Rosslers sight....
Been setting pinion angle up like that for 20+ years and never had a drive line failure.
Or even a vibration for that matter...
67 Barracuda street/bracket car 11.27-119 68 Dart 502 BB 8.70s-152 414 cid SB Dragster 7.65-174
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Re: Pinion Angle - here we go....
[Re: 493_DART]
#973481
04/15/11 01:14 PM
04/15/11 01:14 PM
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Joined: Nov 2010
Posts: 1,397 Carson City, Nevada
Biginchmopar
pro stock
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pro stock
Joined: Nov 2010
Posts: 1,397
Carson City, Nevada
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Quote:
Quote:
Well, I hate to tell you this but lets start over. 1.) Get the car up in the air with the car supported on the rear axle and the front supported around the front suspention. 2.) Take the driveline off the pinion yoke. 3.) Measure the angle on the pinion yoke were the caps bolt to. 4.) This should give you a measurement with the needle on one side of 90* towards the front of the car or towards the back of the car. Record it. 5.) Put the driveline back on 6.) Now put the tool on the bottom of the driveline and take another measurement. Again it should be on one side or the other of the 90* mark toward the front or back of the car. Record it. 7.) Now that all that is done if one measurement is 4* toward the back and the other is 2* toward the front your pinion angle would be 6*. 8.) If they are both the same way (toward the back) 4* and 2* then your pinion angle is 2*.
Hope all this helps!
ok on the rear yoke its 80 needle pointing to the rear
on the D-shaft its 86 needle pointed to the front of car
this is with the car on the ground -- weight in the seat. Thats how "most" of the people say to measure.
With this info I would say your pinion angle is 14*
Your info says to me that the pinion yoke is down 10* and you driveshaft angle is down 4*
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Re: Pinion Angle - here we go....
[Re: moparniac]
#973483
04/15/11 01:28 PM
04/15/11 01:28 PM
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Joined: Nov 2010
Posts: 1,397 Carson City, Nevada
Biginchmopar
pro stock
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pro stock
Joined: Nov 2010
Posts: 1,397
Carson City, Nevada
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Quote:
trans seal - measured vertically 88 degrees (2?) UP . (you can go off the balancer if you can get on it for this measurement also)
pinion yoke (u joint cap) 5 degrees DOWN
so ... what is my pinion angle ?
-3
I would say 7* pinion angle. This is why if your transmission was 0* just for sake of trying to make things easy, then you raise the trans 2* you have added angle if you lower it 2* you would have 3* pinion angle. This is why I always use the drive shaft and the pinion yoke, the math is easier.
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Re: Pinion Angle - here we go....
[Re: Biginchmopar]
#973484
04/15/11 02:03 PM
04/15/11 02:03 PM
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Joined: Jan 2003
Posts: 16,123 Grand Haven, MI
patrick
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
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Quote:
Quote:
trans seal - measured vertically 88 degrees (2?) UP . (you can go off the balancer if you can get on it for this measurement also)
pinion yoke (u joint cap) 5 degrees DOWN
so ... what is my pinion angle ?
-3
I would say 7* pinion angle. This is why if your transmission was 0* just for sake of trying to make things easy, then you raise the trans 2* you have added angle if you lower it 2* you would have 3* pinion angle. This is why I always use the drive shaft and the pinion yoke, the math is easier.
bzzzt! do not pass go, do not collect $200.
pinion angle is the angle of the tranny output shaft relative to the pinion shaft. if the tranny is 0, to have 0 pinion angle, the pinion has to be 0. if the tranny is 2 deg. nose up (higher in rear than front), the pinion has to be 2 degrees nose down (higher in the rear than the front) for pinion angle. his pinion shaft is 3 degrees nose down more than the 0 point, so -3 (3 degrees nose down) is correct
1976 Spinnaker White Plymouth Duster, /6 A833OD 1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!*** 2011 Toxic Orange Dodge Charger R/T 2017 Grand Cherokee Overland 2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)
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