8.8 swap please help with pinion angle PICS
02-03-2012, 04:57 PM
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Year: 1994
Model: Cherokee
Engine: 4.0
8.8 swap please help with pinion angle PICS
Ok doing an 8.8 swap in my 92 Xj with dana35.
Have a 2000 8.8 all set up and im about to burn the perches in.
I need help figuring out how many degrees to set my perches up at. im currently running a stock drive shaft and i have no vibes until over 65mph.
If i put the angle finder on my trans pan im at 0
When i put my angle finder on my u joint on t case side i have 5 degrees
On the rear pinion i have exactly 15
Can anyone tell me what i should set the perches to? I can get more detailed pics or any info you need thank you!
Have a 2000 8.8 all set up and im about to burn the perches in.
I need help figuring out how many degrees to set my perches up at. im currently running a stock drive shaft and i have no vibes until over 65mph.
If i put the angle finder on my trans pan im at 0
When i put my angle finder on my u joint on t case side i have 5 degrees
On the rear pinion i have exactly 15
Can anyone tell me what i should set the perches to? I can get more detailed pics or any info you need thank you!
02-03-2012, 06:23 PM
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Year: 1994
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better explanation. I have searched and searched and theres so many ways of measuring and it seems no one really has a straigth answer. i only want to weld these perches on once.
Last edited by Littlethunder92; 02-04-2012 at 07:23 AM.
02-04-2012, 06:53 AM
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Year: 1994
Model: Cherokee
Engine: 4.0
Can anyone tell me what my pinion angle is now? I thought i would take the driveshaft angle and subtract it from the rear pinion angle but wouldnt the driveshaft angle be Negative -10 degrees beings its facing down, and the pinion would be positive +15 degrees beings its facing up. That would come out to negative -5 degrees which matches my T case yoke measurement. Can someone please confirm thank you!
The more im looking at it, i should set my perches at 17 degrees + that way i have 2 degree difference ?????????
The more im looking at it, i should set my perches at 17 degrees + that way i have 2 degree difference ?????????
Last edited by Littlethunder92; 02-04-2012 at 06:58 AM.
02-04-2012, 07:09 AM
#4
First off....
Get an SYE, you need it if the spec's on your jeep are correct.
Without an SYE your angles should be equal.
With an SYE you raise the pinion so it is pointing directly at the t-case output.
Get an SYE, you need it if the spec's on your jeep are correct.
Without an SYE your angles should be equal.
With an SYE you raise the pinion so it is pointing directly at the t-case output.
02-04-2012, 07:19 AM
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"First off....
Get an SYE, you need it if the spec's on your jeep are correct."
that will be in the future,but i have to recover from this expense first.
Now from the diagram you posted, it seems the centerline of my pinion and diff are parallel? Unless im doing the math wrong,which i probably am!
The degree measurements are correct though i went to a super flat parking lot and got the yokes straight up and down put a socket on the joint cap and my angle finder on there.
T case yoke : Negative - 5
Drive shaft : Negative -10
Pinion Yoke : Positive +15
Get an SYE, you need it if the spec's on your jeep are correct."
that will be in the future,but i have to recover from this expense first.
Now from the diagram you posted, it seems the centerline of my pinion and diff are parallel? Unless im doing the math wrong,which i probably am!
The degree measurements are correct though i went to a super flat parking lot and got the yokes straight up and down put a socket on the joint cap and my angle finder on there.
T case yoke : Negative - 5
Drive shaft : Negative -10
Pinion Yoke : Positive +15
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