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Old 02-12-2005, 09:43 PM
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figuring length of driveshaft

I have a 700r4 driveshaft that I have to shorten for a project vehicle and I'm wondering how far the slip yoke should be into the transmission tailshaft when I do the measuring. The slip yoke can go in a maximum 4". The shiny wear mark on it suggests the furthest into the tailshaft it's ever run is 2 3/4" from the end. How far in should I shove the slip yoke when I measure for proper length? The vehicle is sitting with its weight on the wheels.

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Old 02-12-2005, 09:50 PM
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What I would do is slide the yoke in to the shiny wear spot is on the seal. Then measure the center of the U joint to the center of where the rear U joint would be......

Always worked in the past.........

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Old 02-13-2005, 07:04 AM
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murrsue,

If you are having a shop do your drive shaft, and I assume you are, contact them about exactly how they take their measurements. Seems to me every shop does it a little different and they want their measurements the way they are used to doing things.

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Last edited by cboy; 02-13-2005 at 10:39 AM.
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Old 02-13-2005, 07:19 AM
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I agree with Dewey...

contact the shop where your getting the shaft cut and ask them how they want the measurement taken.


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Old 02-13-2005, 08:15 AM
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I'll call the shop Monday. I was mostly wondering what the proper amount the slip yoke is supposed to go into the tailshaft. By the wear marks it looks like it was only in about half way (2") and move in a further 3/4" when the rearend compressed on bumps.
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Old 02-19-2005, 04:00 PM
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You're exactly right, Mursue. The splined shaft usually slips about halfway into the tranny so there there is enough slack to absorb the flex in the rear suspension. If you set it up too tight it will hit the rear seal when you hit a bump...something you DO NOT want to happen!!

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