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86454k30 · 09-19-2010, 10:04 PM

I had an 86 K30 and my dad had an 83 K30 dually both 4" rancho lifts. The 83 rode terrible compared to my 86 I never knew why...until I put Polyurethane cab mount bushings in my 86. I new with in the first 5 minutes of driving it why the 83 rode worse as I had installed poly cab mounts in his when we built it. I ordered a new set of GM cab mounts and took the poly ones back out of my 86. In my opinion stick with the OE rubber bushings.

09-19-2010, 10:04 PM	#5
86454k30 Registered User Join Date: May 2008 Location: Spokane, Washington Posts: 596	Re: Polyurethane Body Mount Bushings I had an 86 K30 and my dad had an 83 K30 dually both 4" rancho lifts. The 83 rode terrible compared to my 86 I never knew why...until I put Polyurethane cab mount bushings in my 86. I new with in the first 5 minutes of driving it why the 83 rode worse as I had installed poly cab mounts in his when we built it. I ordered a new set of GM cab mounts and took the poly ones back out of my 86. In my opinion stick with the OE rubber bushings.