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2500HD/3500 HD Trucks & Drivetrain Discussion Forum for the 2001 & newer 2500HD/3500 Trucks, Transmissions & Drivetrain

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Old 10-31-2007, 07:05 AM
Mark Rinker's Avatar
Mark Rinker Mark Rinker is offline
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Default 'Jerky' oil pressure gauge

High mile 2002 has good oil pressure, but gauge no longer operates in smooth, sweeping motion - rather, it jumps in 30-40# increments in either direction when climbing or dropping.

Replace OPS, or gauge? If the gauge, can the cluster be pulled from a wreck and maintain correct mileage - or would you replace only that gauge?
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Old 10-31-2007, 08:43 AM
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DmaxMaverick DmaxMaverick is offline
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Put an ohm meter on the OPS output and monitor it. If it is bad, the meter should show the wild swings. If it has a smooth transition, replace the cluster. If you happen upon a used cluster, you can replace just the gage, but you aren't supposed to be able to. It will take some creative skill. You can send the cluster to a repair place (Robyn, I think, mentioned one that does this) and have the cluster repaired. Also, it may be a resistor on the gage causing the problem like older models, but I haven't looked into it, so it may not. If so, it would be a simple fix, just replace the resistor.
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