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72MARIO · 10-07-2013, 08:45 AM

Works to 90km about 55mph in 2wd If I get it faster and snap out of the throttle it will jump to speed. As soon as I put it in 4wd it works perfectly....any ideas ?

10-07-2013, 08:45 AM	#1
72MARIO Registered User Join Date: Nov 2000 Location: Huntsville Ontario Canada Posts: 4,051	speedometer works only in 4wd 1990 Burbn? Works to 90km about 55mph in 2wd If I get it faster and snap out of the throttle it will jump to speed. As soon as I put it in 4wd it works perfectly....any ideas ? __________________ 1968 Suburban numbers matching all original truck now equipped with 6.0/4L80 on Accuair http://67-72chevytrucks.com/vboard/s...d.php?t=625017 1967 C/20 6.0/4L80 Roofing Truck 1990 V2500 Suburban "Plow Truck" 2005 TAHOE DD