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Idahome
Joined: Wed May 2nd, 2018
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If your old speed sensor was in pieces then something is wrong in there
The computer already said it was a speed sensor issue, you found the old one in pieces...I would start there
You can pull the diff cover for a better look if needed.
With a camera (on your phone) you can look down in the speed sensor hole if your head does not fit
397K on a rear axle, this 4 banger has a 7.5" rear right? That is really good miles from this thing! Might be time for a carrier rebuild..........
you can feel like a buck or kick slightly.
Is it in the brakes? A buck or kick is usually a engine miss? or a rough downshift? The downshift could be caused by funky speed sensor signal
You can try to get some live data of the speed sensor and watch what is happening during your slowing to a stop
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I build custom RBV, specializing in drivetrain conversions, wiring, suspension and complete custom trucks