How to KNOW if my driveshaft is too long or too short... write up -
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Unread 12-31-2011, 11:05 PM   #1
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2006 TJ Wrangler 
Join Date: Sep 2008
Location: SoCal
Posts: 2,306
How to KNOW if my driveshaft is too long or too short... write up

Okay... this forum is great with a lot of people having experience to answer questions. I just happened to be getting my front diff back in place ( with about a 1" stretch ) and I needed to see if my DS will work. So here it is... the only way to know beyond the shadow of a doubt that your DS is not too long or too short for your setup.

The first thing I did was to pull off the clamps around the rubber boot and pull the DS splines apart. When I got it apart... I measured the length of the splines and they were 3 1/4" long. So at the fully stuffed position... I had 1/2" of splines showing outside the opposing end meaning that I had 2 3/4" of engagement.

This pic isn't fully stuffed but its close.

Then I drooped the axle fully and measured it again... here I had 1" exposed so I have only 2 1/4" engaged.

So, now I have to decide if it's okay to go with a 2 1/4 engagement... For me personally, I will be having the shaft lengthened cause I can easily have full engagement throughout the entire range of motion.

Anyway... this is the ONLY way to KNOW if your DS will not fall apart or not compress enough and breaking your TC in half. So you can take someones word if it will work but where are they if something goes wrong????

Don't be lazy... check your stuff out!!!!!


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Fellowship... Is like having a good spotter.

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