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Old 02-28-2013, 03:59 PM   #1
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Default 1999 Astro - speedometer and driveline issue..

1999 Astro issue..



The problem is that at times, the speedometer jumps around while at cruising speeds. When it's doing this, the car stumbles/surges as if it's trying to find a lower gear if you try to accelerate even gently. When you put the pedal down to the floor, it makes it much more apparent. At around 40-45, it seems like it tries to go down into first gear. This issue doesn't happen at all in first gear which makes me for some reason think it's a vehicle speed sensor. On older cars, I would think it was the speedometer cable, but they stopped using those in like 92 or so on these. If I remember right, I think the only VSS on this vehicle is at the front of the driveline? Hopefully you guys can help me out.
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Old 02-28-2013, 04:18 PM   #2
 
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Start with the speed sensor, a lot of GM's rely heavily on the VSS for drivability.
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Old 02-28-2013, 04:21 PM   #3
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It's outside the trans, right?
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Old 02-28-2013, 04:21 PM   #4
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I googled it, showing a reluctor wheel and the sensor itself. Could any kind of debris have somehow gotten in where it's at, or do you think the sensor just failed?
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Old 02-28-2013, 04:33 PM   #5
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Speed sensor for sure. If it's anything like the old Fords it's used for torque converter lockup, gear selection, etc.
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Old 02-28-2013, 05:11 PM   #6
 
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Just replace the sensor. 140k was a good ride
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Old 03-03-2013, 08:35 PM   #7
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Default Re: 1999 Astro - speedometer and driveline issue..



Neat.
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Old 03-03-2013, 08:41 PM   #8
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yup. had to do it to my formula too.
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Old 03-03-2013, 11:57 PM   #9
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Default Re: 1999 Astro - speedometer and driveline issue..

What should I do with this?

Wire all fucked up. Only works in first and then I have to manually go to second
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Old 03-04-2013, 12:00 AM   #10
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matches and a gallon of gas
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Old 03-04-2013, 12:54 AM   #11
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Default Re: 1999 Astro - speedometer and driveline issue..

SUCH GAYS
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Old 03-04-2013, 01:35 PM   #12
 
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Cut out the section of wire that is rubbed through, solder it back together, heat shrink it.
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Old 03-04-2013, 03:14 PM   #13
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sell it to me for scrap price.
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Old 03-04-2013, 04:09 PM   #14
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Default Re: 1999 Astro - speedometer and driveline issue..

Factor in a nice reach around and I'll consider it, pretty boy
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Old 03-04-2013, 07:53 PM   #15
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fixed. also hung the fucking bajeesus out of the wire so this doesn't happen again.

also threw some royal purple in that bitch.

not baller enough for
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