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Old 08-27-2012, 08:50 PM   #6
bbchevy
87 Wanna Be K30
 
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Join Date: May 2003
Location: long island, new york
Posts: 218
Re: 99 5.3 4L60E speedo freaks out tranny freaks out..not VSS

Ok, so some sleepless nights gave me an idea. I was thinking about the transfer case fluid being full if metal. Vss is a magnetic pickup. Picked up metal shaving from the oil. I brake cleaned inside from the top and drained out the bottom. Left it empty (I know) and drove it down the road. Speedometer worked fine for a minute or two then started screwing up again.

The inside of the t case is just all wore out and dirty. Replaced t case. Clean gm autotrac fluid. Good to go. Shifts drives runs ... like new. All a wore out t case that was contaminated with endless metal shaving supply that would confuse the vehicle speed sensor.

I hope it helps someone in the future.

-Scott
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Was: 1987 V10 Silverado
TBI 350/700R4/208 with 3.42 gears

Is: A wanna be K30
330hp 350/465/205/D60/14FF with 3.73
hydroboost, 4 Core radiator, electric fans, Centerforce Duel Friction, Locker, 6inch Soft ride lift, etc....
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