Suspension Lifts and the Affect on Wheelbase..

LRNAD90

Well-known member
The strange places my mind wanders, anyone else want to go on the journey with me? LOL

Okay, so I'm sure it is no surprise to most of the members here that when we lift our trucks, the wheelbase shortens, unless longer radius and/or trailing arms are used. It's just the nature of the fact that when the axles move up or down, they move in an arch.

Just how much the wheelbase has changed at the new ride height is what I was curious about. So I pulled out the tape measure straight edge and a bubble level and did my best to accurately measure the wheelbase of my lifted NAS D90.

Stock height the wheelbase is supposed to be 92.9"

I'm running an old school SG Stage III kit, with stock radius arms and stock length aftermarket trailing arms..

Looks like I'm at 92" This doesn't seem like that much change, but it is visibly noticeable:

So how much benefit is their in returning the wheelbase through the use of lengthened radius and/or trailing arms (and possibly an a-arm extension in the rear)?

Of course the front axle also shifts to the Drivers side, thanks to the same phenomenon with the panhard rod, but in a different axis. This I didn't attempts to measure..

Of course lengthening these arms also means the wheelbase extends (more than stock) when the suspension compresses. Is their room for this or will tires be more likely to have body interference? And will driveshafts run out of usable extension travel at the spline (this also affects pinion angle on the driveshafts, I know)?

Thoughts?

Wheelbase change with lift photo.jpg
 

rocky

NAS-ROW Addict
The driveline angles get sharper. There is only so much the UJs can handle without vibration.
 
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