Pinion angle question

B

brian b

Member
Joined
Dec 26, 2008
I measured my pinion angle from the passenger side and came up with 4deg to the right of the zero on the drive shaft. Then the pinion and got 6deg from the left of the zero. Does that give me negative 2 deg?
 
OK say I measured from the drivers side, I would have got 4deg to the left of the zero on the drive shaft and 6deg to the right of the zero on the pinion. Does that give me negative 2 deg?
 
Clean ......no undercoating, grime etc........flat spot on bottom front of rearend....record the reading

Clean....same as rear.......record reading

Deduct the DS from rear ...theres your pinion angle

3 degrees max negative (front of rearend down relative to DS) for a street car for u joint life
 
New drive shaft (no dirt on it yet) placed angle finder on bottom of drive shaft and got 4deg (either pos or neg depending on which side of vehicle I took the reading from). Removed drive shaft and placed a long socket vertical where the U joint seats then placed angle finder vertical on socket to get my pinion angle reading of 6 deg (either pos or neg depending which side of the vehicle I took it from). I subtracted +4 Drive shaft number from -6 pinion angle number and came up with -2 ( -6 - +4 = -2).

The car is up on equal height ramps with the suspension loaded as it is when I'm sitting in it. Does anyone else concur that this is set right or is my math/procedure off and I'm about to snap a U joint.
 
There is a flat spot under the front snout of the rear end ...thats where you check it. Dont have to pull the driveshaft
 
The flat surface on the bottom of the rear is not parallel with the pinion shaft. It seems to taper up from the pinion towards the rear diff cover. I get a measurement of 4deg on the flat part at the bottom of the rear diff.
 
I've always used a socket the size of the u-joint cap and stuck my magnetic angle finder on the socket as it sits flush with that cap at the 6 o'clock position on the rear end and then the trans u-joint. Has always given me great results
 
Ok...last question. If my driveshaft has an angle of 4deg pointing down to the ground towards the rear of the vehicle, what angle should my pinion be pointing down to the ground towards the front of the vehicle to get a neg2 pinion angle?
 
If you want 2* of pinion angle relative to the driveshaft then the pinion should be pointing UP 2* from horizontal.

KS
 
Thank You Kevins!!! Think I finally wrapped my mind around this simple math. My calculations above are way off. Giving me -10deg. ouch. I should have 4deg on the drive and 2deg on the pinion with the readings being on the same side of the zero.
 
brian b said:
Thank You Kevins!!! Think I finally wrapped my mind around this simple math. My calculations above are way off. Giving me -10deg. ouch. I should have 4deg on the drive and 2deg on the pinion with the readings being on the same side of the zero.
Click to expand...
You got it!

ks:cool:
 
You must log in or register to reply here.

Similar threads

V6-Sauce
Question about Hooker blackheart steering shaft installation?
Replies
3
Views
345
'87 Turbo "T"
'87 Turbo "T"
T
TRE Performance Fuel Pump Wiring
Replies
1
Views
173
BEATAV8
BEATAV8
TIMINATOR
YET ANOTHER NOT "BOLT IN"
Replies
18
Views
1K
TIMINATOR
TIMINATOR
SETXTurbo
Help Diagnosing a Hard Contact Point/Noise
Replies
9
Views
669
AN/GSC-52
AN/GSC-52
E
Detroit TrueTrac Posi install
Replies
4
Views
682
edfiero1
E
Top