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pinion angle #822627
10/05/10 07:50 PM 10/05/10 07:50 PM
Joined: Mar 2004
Posts: 878
hudson valley n.y.
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GEORGE68HEMIRR Offline OP
super street
GEORGE68HEMIRR  Offline OP
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hudson valley n.y.
hi guys....just wanted to ask a question....i am going up to the track saturday and i am trying to get my rear set up right.....95% of the time i drive it on the street and maybe hit the track 4-5 times a year......right now with the suspension loaded and the car level my trans is -5 degrees and my pinion is 0 degrees....i am running super stock springs on my roadrunner with a pinion snubber about 1 inch from the floor...i am cutting off and rewelding new axle saddles since the rear is out of square with the center line of the car.....should i minus the pinion ?? degrees
if anyone could help me out that would be great
thanks
george
Re: pinion angle [Re: GEORGE68HEMIRR] #822628
10/05/10 08:03 PM 10/05/10 08:03 PM
Joined: Feb 2007
Posts: 5,080
organ
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maximum entropy Offline
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organ
at the risk of being flagellated by the 'pinion master, -5 is ok. i run mine about -6 on the street with ss springs and it has been very reliable. i do get a little vibration at high speed cruise, but that's just the way it's got to be until i backhalf it and get the angle closer to zero.

for what is the good life if not doing things thoughtfully?
Re: pinion angle [Re: maximum entropy] #822629
10/05/10 08:18 PM 10/05/10 08:18 PM
Joined: Mar 2004
Posts: 878
hudson valley n.y.
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GEORGE68HEMIRR Offline OP
super street
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hudson valley n.y.
so maybe i should minus the pinion angle down to -1 or maybe -2 since i am installing new saddles anyway?
Re: pinion angle [Re: GEORGE68HEMIRR] #822630
10/05/10 09:01 PM 10/05/10 09:01 PM
Joined: Feb 2007
Posts: 5,080
organ
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maximum entropy Offline
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organ
-7 is near ideal with ss springs. it won't be the smoothest at high speed cruise, and it may need ujoints every couple of years, but i have had no problems at -6 (actually more like -6.5).

for what is the good life if not doing things thoughtfully?
Re: pinion angle [Re: maximum entropy] #822631
10/05/10 09:26 PM 10/05/10 09:26 PM
Joined: Mar 2004
Posts: 878
hudson valley n.y.
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GEORGE68HEMIRR Offline OP
super street
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so if i use the pinion degree indicator on my pinion yoke to measure degrees i would need plus 2 degrees on my pinion to get minus 2 degrees nose down which is ideal for the street and occasionally for the track.....what do you think?
Re: pinion angle [Re: GEORGE68HEMIRR] #822632
10/06/10 12:11 AM 10/06/10 12:11 AM
Joined: Jan 2003
Posts: 6,591
Canton, Ohio
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Sport440 Offline
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Quote:

so if i use the pinion degree indicator on my pinion yoke to measure degrees i would need plus 2 degrees on my pinion to get minus 2 degrees nose down which is ideal for the street and occasionally for the track.....what do you think?




No, plus 2* pinion will get you 3* nose down pinion angle compared to your 5* down tranny centerline angle. mike
Re: pinion angle [Re: Sport440] #822633
10/06/10 02:04 AM 10/06/10 02:04 AM
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Posts: 878
hudson valley n.y.
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GEORGE68HEMIRR Offline OP
super street
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your right,,,,thanks mike
Re: pinion angle [Re: GEORGE68HEMIRR] #822634
10/06/10 12:04 PM 10/06/10 12:04 PM
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organ
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organ
i wouldn't run -2 with ss springs at the track. that's a driveline killer.

for what is the good life if not doing things thoughtfully?
Re: pinion angle [Re: maximum entropy] #822635
10/06/10 12:31 PM 10/06/10 12:31 PM
Joined: Jan 2003
Posts: 8,016
Polson, MT
DoctorDiff Offline
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Normally, a true 4 degree negative pinion angle is the maximum I recommend. This is relative to the transmission center-line, not to the driveshaft or the ground.

I like to see 2 degrees negative for a street car.

Contact info
Re: pinion angle [Re: Sport440] #822636
10/06/10 08:34 PM 10/06/10 08:34 PM
Joined: Oct 2007
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New York
polyspheric Offline
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BTW: to make a "degree" sign, press & hold the ALT key, while typing 0 1 7 6

Boffin Emeritus
Re: pinion angle [Re: polyspheric] #822637
10/06/10 10:01 PM 10/06/10 10:01 PM
Joined: Jan 2003
Posts: 6,591
Canton, Ohio
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Sport440 Offline
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Quote:

BTW: to make a "degree" sign, press & hold the ALT key, while typing 0 1 7 6




Okay 45 ALT key 0176

45, nothing

Okay 45 ALT key 0 1 7 6

45, nothing, alright quit screwing with me.

Re: pinion angle [Re: DoctorDiff] #822638
10/06/10 11:47 PM 10/06/10 11:47 PM
Joined: Mar 2004
Posts: 878
hudson valley n.y.
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GEORGE68HEMIRR Offline OP
super street
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was talking to a guy who sets-up ladder bar/4 links....chevy guy....and he said.....level car suspension loaded.....check the degrees on the driveshaft which is minus 1 degree and the pinion is 0 degrees....for me to lower or minus the pinion to 2 degrees which would give me minus 3 degrees.....he said never raise or plus the degrees of the pinion because of spring wrap up.......what do you think?.....and i will be using a pinion snubber
Re: pinion angle [Re: GEORGE68HEMIRR] #822639
10/07/10 12:38 AM 10/07/10 12:38 AM
Joined: Jan 2003
Posts: 8,016
Polson, MT
DoctorDiff Offline
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Polson, MT
That method only works sometimes, depending on the angle of the engine/transmission.

Pinion angle is the relationship between the transmission centerline and the pinion centerline. Ideally, you want the pinion to become relatively parallel to the transmission as the pinion swings upward when the car is under power. This is how U-joints are designed to run.

In other words, make the pinion parallel to the transmission as a base-line, then rotate the pinion downward 2-4 degrees.

Don't worry about the operating angle of the driveshaft unless the vehicle is severely lowered or raised, causing the U-joints to bind.

Contact info
Re: pinion angle [Re: Sport440] #822640
10/07/10 01:14 AM 10/07/10 01:14 AM
Joined: Aug 2003
Posts: 8,716
Baltimore/Denver
64Post Offline
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Quote:

Quote:

BTW: to make a "degree" sign, press & hold the ALT key, while typing 0 1 7 6




Okay 45 ALT key 0176

45, nothing

Okay 45 ALT key 0 1 7 6

45, nothing, alright quit screwing with me.




45º....45º....45º... 45º

Re: pinion angle [Re: 64Post] #822641
10/07/10 01:35 AM 10/07/10 01:35 AM
Joined: Jan 2003
Posts: 6,591
Canton, Ohio
S
Sport440 Offline
master
Sport440  Offline
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S

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Posts: 6,591
Canton, Ohio
Quote:

Quote:

Quote:

BTW: to make a "degree" sign, press & hold the ALT key, while typing 0 1 7 6




Okay 45 ALT key 0176

45, nothing

Okay 45 ALT key 0 1 7 6

45, nothing, alright quit screwing with me.




45º....45º....45º... 45º




Allright, Even if I do figure out how to create a degree symbol. Im still going to just use this

45*... 45*...45*...45* Get used to it. mike

Re: pinion angle [Re: Sport440] #822642
10/07/10 11:01 AM 10/07/10 11:01 AM
Joined: Jan 2005
Posts: 3,699
Newport, Mi
Evil Spirit Offline
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Evil Spirit  Offline
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Newport, Mi
Every time I read one of these pinion angle posts my right nipple starts to bleed.


Measure trans. Make pinion the same, as in parallel. Tip the front down an additional 5*. That's 5* pinion angle. Done like dinner.

Free advice and worth every penny...
Factory trained Slinky rewinder.........
Re: pinion angle [Re: DoctorDiff] #822643
10/07/10 11:34 AM 10/07/10 11:34 AM
Joined: Oct 2003
Posts: 7,506
Az
Crizila Offline
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Az
Quote:

Normally, a true 4 degree negative pinion angle is the maximum I recommend. This is relative to the transmission center-line, not to the driveshaft or the ground.

I like to see 2 degrees negative for a street car.

Over 4 and you are asking for a drive line rumble on the street.

Fastest 300
Re: pinion angle [Re: Crizila] #822644
10/07/10 12:25 PM 10/07/10 12:25 PM
Joined: Feb 2007
Posts: 5,080
organ
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maximum entropy Offline
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maximum entropy  Offline
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M

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Posts: 5,080
organ
Quote:

Quote:

Normally, a true 4 degree negative pinion angle is the maximum I recommend. This is relative to the transmission center-line, not to the driveshaft or the ground.

I like to see 2 degrees negative for a street car.

Over 4 and you are asking for a drive line rumble on the street.

true

for what is the good life if not doing things thoughtfully?
Re: pinion angle [Re: DoctorDiff] #822645
10/07/10 03:26 PM 10/07/10 03:26 PM
Joined: Mar 2004
Posts: 878
hudson valley n.y.
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GEORGE68HEMIRR Offline OP
super street
GEORGE68HEMIRR  Offline OP
super street
G

Joined: Mar 2004
Posts: 878
hudson valley n.y.
Quote:

Normally, a true 4 degree negative pinion angle is the maximum I recommend. This is relative to the transmission center-line, not to the driveshaft or the ground.

I like to see 2 degrees negative for a street car.


If the transmission slopes downward 5 degrees toward the rear, the pinion should slope upward 2 degrees toward the front.

This is referred to as 3 degree negative pinion angle. I consider 4 degree negative to be the maximum for a true street car.
thank you doctor diff....thats what i am going to do.....i will report back when i am done with the test drive.....3 degrees negative pinion angle

Re: pinion angle [Re: GEORGE68HEMIRR] #822646
10/07/10 04:32 PM 10/07/10 04:32 PM
Joined: Oct 2006
Posts: 4,590
Indy
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joshking440 Offline
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