Pinion angle/ shims
#1
Pinion angle/ shims
I was driving my truck this morning, all was well for the trip i took into town to get fuel, Then i took off hard and began noticing a vibration.
I thought it was my new exhaust i just fabbed up possibly settling and hitting my rear axle.
Drove down the freeway, vibration got worse, but then with varied speeds it would go away.
Got off the freeway, back thru town, on my way home i punched it and she went, but then BOOM, and a grinding sound, also felt like neutral so i Knew i lost the drive shaft.
Any way the rear U - joint broke, actually the caps came off the housing yoke.
So i believe i need pinion/axle shims since i have Rear hangers and shackles.
What are you guys running with similar setups as mine???
( 2'' McG's drop spindles/stock keys front, Mcg's rear hangers, shackles, removed rear block.)
I thought it was my new exhaust i just fabbed up possibly settling and hitting my rear axle.
Drove down the freeway, vibration got worse, but then with varied speeds it would go away.
Got off the freeway, back thru town, on my way home i punched it and she went, but then BOOM, and a grinding sound, also felt like neutral so i Knew i lost the drive shaft.
Any way the rear U - joint broke, actually the caps came off the housing yoke.
So i believe i need pinion/axle shims since i have Rear hangers and shackles.
What are you guys running with similar setups as mine???
( 2'' McG's drop spindles/stock keys front, Mcg's rear hangers, shackles, removed rear block.)
#6
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running a similar setup tim, 4/4 drop rear is a shackle and hanger as well and i ran 6 degree shims and have pretty much elimated any vibrations . most commonly 65-75 mph is where you notice it. i have measured a few other trucks and as said they are different from truck to truck but not alot usually within 2 degrees . 6-8 degree shims are the biggest you will find without stacking which is dangerous and when that much is needed the spring perch's should be re clocked . try 4-6* shims and you should be fine.
#7
running a similar setup tim, 4/4 drop rear is a shackle and hanger as well and i ran 6 degree shims and have pretty much elimated any vibrations . most commonly 65-75 mph is where you notice it. i have measured a few other trucks and as said they are different from truck to truck but not alot usually within 2 degrees . 6-8 degree shims are the biggest you will find without stacking which is dangerous and when that much is needed the spring perch's should be re clocked . try 4-6* shims and you should be fine.
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#10
11 Second Hall Moniter
iTrader: (22)
At static ride height, I had 0*. Besides knowing that 0* is not good for u-joints, on a launch or when accelerating hard, pinion angle would go positive, and I'd get launch shudder or vibration, depending on speed. The 4* shim gave me a -4* driveline angle, and now there is never any vibration.