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Old 09-15-2006, 06:19 AM   #1 (permalink)
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For those have done the 8.8 conversion.

I am upgrading the 4 cylinder manual trans. YJ as funds (and parts) become avaliable.

Question;
I have a 8.8 ready to install. Can I use the stock driveshaft without the SYE ?

The transfer case is going to be a JB 231HD with the SYE but it will not be ready for a few weeks. I`d like to get the 8.8 installed in the mean time. But need to know if I can get away with using the stock 4 cylinder/5 speed drive shaft till the JB 231 comes in.

Course I will not be using the 4WD with the front 4.10`s.

The front HP44 will not be done for a few weeks also. At that point I will do the driveshaft dance on both ends.

Thanks
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Old 09-15-2006, 08:31 AM   #2 (permalink)
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It'll work.
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Old 09-15-2006, 08:59 AM   #3 (permalink)
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Been there done that. No problems at all
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Old 09-17-2006, 09:23 PM   #4 (permalink)
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Yes, no problem. Ran mine for 8 months without an SYE on it.
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Old 09-19-2006, 07:02 AM   #5 (permalink)
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No problems with it stock, I also run the same shaft with my 355 and 33's, I do carry a spare shaft now just in case I blow it though.
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Old 09-19-2006, 07:07 AM   #6 (permalink)
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the 8.8 pinion is actually longer, so the SYE is in a way needed less cause the longer pinion gives you a little length back to the set up
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Old 09-22-2006, 08:59 AM   #7 (permalink)
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Quote:
Originally Posted by supernatural
the 8.8 pinion is actually longer, so the SYE is in a way needed less cause the longer pinion gives you a little length back to the set up
However the offset pinion adds a new degree (no pun intended) of fun when trying to fight vibration without a SYE. When I did my 8.8 I just saved the pennies for the SYE right away for this reason.

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Old 09-22-2006, 03:27 PM   #8 (permalink)
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How is the 8.8 setup?? The spring perches need to be in different places to get the correct pinion angle for a stock driveshaft versus a CV driveshaft. If you don't need to drive it before the t-case comes in, you will save yourself lots of duplicate work by waiting.

I've welded my spring perches 3 times so I know what a pain in the butt it can be.

The offset pinion shouldn't cause any vibrations because the pinion will still be parallel with the centerline of the vehicle and the t-case output will also be parallel with the centerline of the vehicle so the u-joint angles (when viewed from above) at both ends will be the same.

Last edited by KC2OTE; 09-22-2006 at 03:29 PM.
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