pinion angle

builder

NAXJA Forum User

Location

Yucca Valley california

• Mar 15, 2009

• #1

Ok taking a pinion measurement of of the cast fin on a D35 i got a reading of 5*. now taking it off of the machinened section back of diff i got 78. rear diff reading would seem more accurate. how do i arrive at true pinion angle using this measurment? 90-78 = 12 and i know that's not right. do i divide it bye 2? which would give me 6* pinion? just looking for the most accurate way.

 

E

emr1101

NAXJA Forum User

Location

Raleigh, NC

• Mar 15, 2009

• #2

i think you may be over complicating it, just mesure the fin, see what angle it is, and make sure your driveshaft has the same angle

 

R

RCP Phx

NAXJA Forum User

Location

Phoenix,Az

• Mar 15, 2009

• #3

Your numbers sound close,and the machined area is the proper method.BUT,what about the surface you are working off of(angle),you didnt provide any t-case or driveshaft angles,or even what type of shaft/sye your using!!!

 

builder

NAXJA Forum User

Location

Yucca Valley california

• Mar 15, 2009

• #4

RCP i took the T/C off the valve cover 6.5 with 1/2" T/C drop.that one was easy lol.took off fin at diff end 5*. just was wondering the formula for reading off back off diff machined area, since it seemed more accurate. that reading was 78 as i stated in opening thread. 90-78=12. now cut that in half for true * reading? which would be 6*?

 

builder

NAXJA Forum User

Location

Yucca Valley california

• Mar 15, 2009

• #5

Reason i didnt post shaft and lift stats, is i know what to do just want the most accurate readings is all. 3" lift, stock shaft, 6.5* T/C output. for the record i just put the T/C drop on so i can drive it this weekend. will be removing it and buying proper shim for axle end. and a yj yoke at same time. i have a 242 and dont like loosing another 1/2" clearence. thanks in advance.

 

R

RCP Phx

NAXJA Forum User

Location

Phoenix,Az

• Mar 15, 2009

• #6

Pinion angle is pinion angle(theres no dividing by 2,dont know were you got that one).By your numbers,your pinion is 5,5* high(less axle wrap so about 7*).

 

builder

NAXJA Forum User

Location

Yucca Valley california

• Mar 15, 2009

• #7

yes pinion angle is pinion angle lol, when i put the protractor on the machined part of diff it doesnt give a actual * reading as it does on the valve cover or the fin! is says 78, i know there has to be a way to convert that to actual degrees. thats all i was trying to find out. and again i am aware of how to set it up for axle wrap. thanks i will search more.