After 5000 or so miles after the SYE install, my speedo quit and check engine light came on. Standard VSS code. After pulling the sender/gear assembly, the teeth on the drive gear and speedo gear were chewed. The instructions from Tom Woods have you rotating the off-set gear until it just engages. Other's have suggested you line up the gear range imprinted on the housing.
So I pull the driveshaft, yoke, and housing off. Swap the drive gear end for end as the damage is only at the one end where the gear rides on. Several hours later and overnight to let the UltraGrey RTV set, I fill the case with ATF+4 and attempt to set it up by rotating the housing while the wife watches the speedo. I swear I can feel when it starts to spin, yet nothing so I keep rotating further. Finally I get it kind of working but it fails after a block or so. So... I order a new wheel, drive gear, sensor, and pigtail just in case.
This weekend, I tear it all apart. Chuck a drill on the end of the speedo gear, spin in up, and nothing. Pull the sender out of the black housing, spin it up, and the speedo works fine. (rest deleted)
Update! The reason the gears were getting chewed up plus the sender square drive not being lined up (causing no output) was this little warning in Advance Adapters instructions. Most of you guys won't run into this problem with big rubber and lower teeth counts.
"When installing a speedometer gear with either 39, 40, 41 or 42 teeth, the gear and the housing must be installed separately. These are all large diameter speedometer gears. By first installing the gear into the tailhousing you will be able to tilt the gear shaft up allowing you to position the gear past the output shaft. Once this gear is in place, the speedometer housing must be aligned with the speedometer gear shaft and indexed into the tailhousing. When installing the speedometer housing, lube the o-ring that contacts the tailhousing with a bit of oil. This will prevent the o-ring from being nicked upon installation or rotation, causing this housing to leak. "
So it looks like the gear wasn't getting past the O/P shaft to ride in the correct spot. This forced the sender drive too deep into the plastic gear and that's why it wasn't generating a signal. Another gear is on order...
So I pull the driveshaft, yoke, and housing off. Swap the drive gear end for end as the damage is only at the one end where the gear rides on. Several hours later and overnight to let the UltraGrey RTV set, I fill the case with ATF+4 and attempt to set it up by rotating the housing while the wife watches the speedo. I swear I can feel when it starts to spin, yet nothing so I keep rotating further. Finally I get it kind of working but it fails after a block or so. So... I order a new wheel, drive gear, sensor, and pigtail just in case.
This weekend, I tear it all apart. Chuck a drill on the end of the speedo gear, spin in up, and nothing. Pull the sender out of the black housing, spin it up, and the speedo works fine. (rest deleted)
Update! The reason the gears were getting chewed up plus the sender square drive not being lined up (causing no output) was this little warning in Advance Adapters instructions. Most of you guys won't run into this problem with big rubber and lower teeth counts.
"When installing a speedometer gear with either 39, 40, 41 or 42 teeth, the gear and the housing must be installed separately. These are all large diameter speedometer gears. By first installing the gear into the tailhousing you will be able to tilt the gear shaft up allowing you to position the gear past the output shaft. Once this gear is in place, the speedometer housing must be aligned with the speedometer gear shaft and indexed into the tailhousing. When installing the speedometer housing, lube the o-ring that contacts the tailhousing with a bit of oil. This will prevent the o-ring from being nicked upon installation or rotation, causing this housing to leak. "
So it looks like the gear wasn't getting past the O/P shaft to ride in the correct spot. This forced the sender drive too deep into the plastic gear and that's why it wasn't generating a signal. Another gear is on order...
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