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post #1 of 5 Old 07-18-2010, 05:05 PM Thread Starter
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1999 TJ Wrangler 
Join Date: Jan 2010
Location: memphis
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driveshaft questions

I am in the middle of my 5.2 swap into my 99 and I am worried about driveshaft vibrations. My questions are.. How do I make sure my driveshafts are straight(not going to bind), are not going to be to long or short? I have the advance adapter mounts welded in the dowel hole spots, swap header and a NV3500. Im confused because people say to get headers, so you don't have to get driveshaft modications... but the mounts weld in one spot Does welding them in the "holes" put you in the right location for correct driveshaft lengths? Any help is greatly appreciated, I love my TJ and dont want it to be a hassle to drive

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post #2 of 5 Old 07-18-2010, 08:57 PM
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1998 TJ Wrangler 
Join Date: Apr 2004
Posts: 26,172
There are other more important factors when considering where to put the motor.

You need enough room for the cooling fan and radiator and you also need enough room around the firewall.

The driveshaft lengths are more of a result of the whole project.
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post #3 of 5 Old 07-19-2010, 07:24 AM Thread Starter
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As of this moment I have the engine frame mounts tacked on the frame in the dowel locations with the engine sitting on them(with the help of my lift),trans and transfer on their said mounts as well. Radiator is in with at least 3 inches between it and front of water pump. My driveshafts reach the differencials, I am just wanting to make sure they don't pull out or jamb in over bumps. I also don't want any vibrations, so I was curious on how to measure them ie side to side and such.. thanks again
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post #4 of 5 Old 07-19-2010, 08:37 AM
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1998 TJ Wrangler 
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How much did you move your tranny/transfer case? Are you within the slots of the skid which gives you around an inch forward or back? If so, when I did my swap, I slid my tranny up to the front of the slots on the skid and I have my motor off centered towards the passenger side and I haven't had any problems with either of the driveshafts. That being said, I do have an sye ordered but I needed to do that a long time ago, but didn't. I'm ready to get my tc back up and get the ds angles right.
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post #5 of 5 Old 07-19-2010, 09:37 AM Thread Starter
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I had to make a new plate to mount the NV3500 to the skid plate. I made a 1/4 inch plate and welded the 4 bolt through it so it would bolt tto the skid plate, then drilled a hole for the trans mount. I really have no front to back movement due to the motor mount design, so that worries me. I don't know if it is correct. All I have is the side to side swing of the slots on the trans mount., beside the 'swing" to one side of the engine due to 1 side being slotted.
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driveshaft length , motor swap , engine swap

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