SOA what angle do I weld the spring purches at? - Pirate4x4.Com : 4x4 and Off-Road Forum
 
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Old 03-10-2006, 01:41 PM   #1 (permalink)
 
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SOA what angle do I weld the spring purches at?

I'm putting dana 44 waggy front and 44 Rodeo rear in my 95 YJ. I'm kind of lost with how far I can rotate the pinion up towards the transfer case with out affecting the steering. Do I set it so the king pins are vertical?

I'm not going to do a shackle reversal. I am going to have the front Mill wrapped along with a new top spring because its bent.

Also on the rear should I rotate the pinion up so its almost parallel with the drive line? I'm installing a Super short SYE so do I really need a CV at the transfer case? I really don't like CV joints. I would rather change a u-joint every couple years.

I know its been talked about. I would have done a search but lucky for me that feature is not working right now. If you know where the thread is please post it.

Thanks

ETA: I just found this: most folks recommend 7 degrees of positive caster. Can someone explain to me how I find the 7 degrees. I do have a angle gauge.

Last edited by RS Coyote; 03-10-2006 at 02:13 PM.
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Old 03-10-2006, 02:52 PM   #2 (permalink)
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Quote:
Originally Posted by RS Coyote
I'm putting dana 44 waggy front and 44 Rodeo rear in my 95 YJ. I'm kind of lost with how far I can rotate the pinion up towards the transfer case with out affecting the steering. Do I set it so the king pins are vertical?
Sure, set the balljoints verticle if you dont want the steering to return to center after a turn and like it to be squirrely on the road. Is this going to be a DD? Set the castor where it needs to be and let the driveshaft work out how its going to live, as long as you have locking hubs, front driveshaft vibration wont be a concern on the road. Downside is this will most likely put the driveshaft down low enough that it gets hit on everything when wheeling so it wont live very long.

Quote:
Originally Posted by RS Coyote
Also on the rear should I rotate the pinion up so its almost parallel with the drive line? I'm installing a Super short SYE so do I really need a CV at the transfer case? I really don't like CV joints. I would rather change a u-joint every couple years.
The pinion should point at the T-case output only if you have a CV shaft, if running a normal single joint driveshaft, the pinion flange should be parallel to the T-case output.



Quote:
Originally Posted by RS Coyote
ETA: I just found this: most folks recommend 7 degrees of positive caster. Can someone explain to me how I find the 7 degrees. I do have a angle gauge.
Set the angle finder on the flat surface by the balljoint. Top balljoint should be behind the lower when looked at from the side.
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Old 03-10-2006, 09:02 PM   #3 (permalink)
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A angle gauge sucks to find castor, you will never get it right.
You have to buy a castor finder, they are expensive but worth it.
With all of the weight on the axle, have a friend turn the wheels all the way to the left. Place the castor finder on the hub and set the bubble to 0 degrees, then have the friend slowly turn the wheels all the way to the right. Once the knuckles are locked, look at the bubble. you will need to (1) adjust your pinion (2) adjust your knuckles (by cutting out the weld and rotating the knuckle) in order to get the bubble to ready anywhere from 4 to 7 degrees of castor.

If you don't do this then your steering will suck.
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