Changing speedo gears in an NP205? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Jim85IROC · 09-19-2005, 10:37 AM

The speedo on my 87 GMC 3500 quit working. I replaced the cable with no change. When I spin the back of the gauge, the needle moves, so I think the gauge is ok... plus the truck is throwing a VSS code, so it seems pretty sure that the cable isn't spinning. Anyway... I have a gear reduction adapter between the transfer case and cable. I checked that and it's working fine, which basically leaves the drive or driven gear in the transfer case. I've changed these on 700R4s and on T5 transmissions, but I've never done it on a transfer case. Is this a piece of cake, or is it a project?

09-19-2005, 10:37 AM	#1
Jim85IROC Registered User Join Date: Dec 2004 Location: Readsboro, VT Posts: 502	Changing speedo gears in an NP205? The speedo on my 87 GMC 3500 quit working. I replaced the cable with no change. When I spin the back of the gauge, the needle moves, so I think the gauge is ok... plus the truck is throwing a VSS code, so it seems pretty sure that the cable isn't spinning. Anyway... I have a gear reduction adapter between the transfer case and cable. I checked that and it's working fine, which basically leaves the drive or driven gear in the transfer case. I've changed these on 700R4s and on T5 transmissions, but I've never done it on a transfer case. Is this a piece of cake, or is it a project? __________________ 1987 GMC Sierra Classic 3500 454 TH400 My Sounddomain Page

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