pinion angle revisited...

[ezernut9mm]

dropped the drive shaft today and got a couple of pics. the ds was about 2 deg and the rear is at 12. that is a ten degree difference with two degrees allowed that leaves eight degrees. am i correct? should i get four or six deg. shims? someone set me right here.

[heep70]

You got the two piece right? I can't remember if after the carrier there is another u-joint.

With a single u-joint driveline (a single u-joint at each end) the rear pinion needs to be no more then 2* under the level of the tranny output shaft.
Here is some reading.

http://www.vibratesoftware.com/html_hel ... Angles.htm

http://www.4x4wire.com/toyota/tech/driveline/

http://www.4crawler.com/4x4/CheapTricks ... -101.shtml

[68F250]

Yeah that's the missing angle we've been waiting for, what's the output shaft angle? You can't proceed until you know that.

[ezernut9mm]

Yeah that's the missing angle we've been waiting for, what's the output shaft angle? You can't proceed until you know that.

as soon as it stops raining and dries up i'm going to drop the front and get those measurements. i did the rear in the 20 mins between getting home from work and sunset so i ran out of time to do the front.

[ezernut9mm]

the tranny angle is about 5 degrees. and since the pinion angle is around twelve, i would say a seven degree difference. so what shims do i need?

[heep70]

What is the carrier bearing at? I believe it needs to be inline with the output of the tranny.

The rear pinion needs to go down with a 5* to 6* shim if the carrier bearing is OK.

[68F250]

You've got two driveshafts? Doh!!

Ok, all three U-joint working angles need to add up to zero. The easiest way for that to happen is for the front U-joint to be at zero to the carrier bearing like heep70 said, then the rear shaft can be treated as if it were a single driveshaft. Sometimes this is not possible and all three angles must be juggled to arrive at zero, that's when you start raising or lowering the carrier bearing.

[ezernut9mm]

thanks for all your help so far guys. i'll check into the carrier bearing angle sometime this week.

[68F250]

Super. So we already know what the transmission outputs shaft angle is, measure the first driveshaft and that will give the working angle of the first U-joint.

[ezernut9mm]

i'll get both ds angles in the morning. just got home from a twelve hour day and i'm beat. but, if i remember right the front shaft was 3* and the rear shaft was 4*.