Maybe take your Alternator to a re-builder and have it checked? That's if there are still any around.
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Maybe take your Alternator to a re-builder and have it checked? That's if there are still any around.
Check with this guy for repairing your instrument cluster:
https://drspeedometer.com/
Casey
I had the IPC overhauled but the problem remains. Since the tranny is OK, the tach has been overhauled, this seems to leave the alternator. Is it possible to replace the sensor in the alternator that generates the signal for the tach, or do I need to put a new alternator in there?
Thanks
Alternators aren't that expensive. I'd replace it... But, before you do, I'd remove the original alternator's pulley, and replace the one on the new alternator. These pulleys are specific to the 6.5L diesel - for tach accuracy. The 6.5L diesel alternator pulley should measure 67mm peak to peak when measuring across the pulley's peaks and valleys.
The last alternator I replaced had a 59mm pulley... That produced about a 500-rpm error. What seems to happen is that the original bad alternator on a 6.5 would be traded in for an auto parts store replacement, not knowing the pulley was unique. Since more of these alternators (and smaller pulleys) were used for a gas engine application, that's what you'll likely get as a replacement.
Thank you very much. I agree with all that you've said. I also concluded, based on a few Internet searches, that that little pulse generator gizmo in the alternator cannot be replaced separately, so I'll just R & R the whole unit. We'll pay particular attention to the pulley.
Will let you know.
If you can find a local re-builder for your original alternator you'll have a much better end product and the correct pulley.
Replaced alternator, I'm told problem is fixed. Have a new IPC and alternator now.
I very much appreciate the advice. This '99 Suburban w/6.5 TD has 66K on the clock, and I intend to keep it forever. You've helped me toward this goal.
:)