Hey Guys, I wanted to start this post as part of your troubleshooting process for grinding gears.
I started a thread called “Clutch adjustment now replacement” but is was really about the transmission grinding when going from low to high gears. I almost cost myself $5000 because I’m impatient.
Anyways if you are getting grinding going from low gears to high gears, try using your high/low selector switch at least 7-10 seconds before going into your high gears. This may allow a lazy solenoid time it needs to reduce/prevent grinding. It worked for me, and saved me $5000 by not needing a replacement transmission due to a bad synchro. It’s common to think a “hard to get in gear/grinding” issue may be a bad synchro, but once I allowed the stickshift selector more time, it stopped being hard to get in gear and grinding.
Bad synchro - replace trans - grinding gears
Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by RepoweredRookie, Aug 16, 2022.
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Could save money by replacing the Slave gear and range selector switch.
Don’t need replacement transmission.RepoweredRookie Thanks this. -
Hammer166, RepoweredRookie and Big Road Skateboard Thank this.
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Wouldn’t hurt to change your transmission fluid/oil.
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Just truck spec:
1999 Freightliner Century 10 speed Eaton, 12.7 detroit. 1.4 million miles.
***Meritor/Rockwell transmission-RM10155A2S021Last edited: Aug 17, 2022
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RepoweredRookie, AModelCat, Big Road Skateboard and 1 other person Thank this.
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And even if all the advice ^up there doesn't help, they make a kit to replace the range synchronizer. That's the usual mechanical cause of range shift grinding, no need to replace the tranny.
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