Manual Trans. Grinds Rebuild? - Ford Powerstroke Diesel Forum
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Old 11-18-2013, 04:51 PM
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Manual Trans. Grinds Rebuild?

I am looking about buying my first diesel. I am considering one OBS 350 which has something wrong with the clutch / tranny. The owner says it grinds when downshifting so he double clutches it. IIRC he said it grinds on up shifts if you shift really fast.

So it sounds like it needs new syncros. Has anyone had a shop do this rebuild for them before? how much money was spent and what were you lessons learned?

Also I think it am capable of rebuilding it myself with the help of some of my co-workers. Has anyone tackled this themselves? I would most probably drop the tranny in my driveway and rebuild it in my garage. How much money have people spent hear on rebuilding the syncros? Should I plan on doing bearings too? Should I expect some of the gears need replaced?

Mileage is roughly 200,000 miles.

Thanks for your help in advance.
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Old 04-29-2015, 03:07 PM
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Was told the same thing with my 95 with 270K on it. Transmission is fine. It's not a race car don't drive it like one and it will behave.

Now if you drive it like it's supposed to, and you are still having these issues, then it could be the synchros or the pilot bearing failing.
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Old 05-02-2015, 01:16 PM
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Yeah that sounds like synchros failing. You can grind any gear with new synchros or old. That's just how these transmissions work. When I couldn't get my truck into first gear we went ahead and rebuilt it. The full kit and rebuild for me was right under 600 and a little over 1400 with my dual disk kit because we still had the dual mass in it. If they tell you replace the trans but haven't pulled it apart don't give it to that shop, these transmissions can hold 500hp easy. They don't just break. But good luck, easier to fix than replace.

Last edited by WFarms97HD; 05-02-2015 at 01:17 PM.
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Old 05-02-2015, 02:57 PM
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A FULL bearing, syncro, seal kit is about $250

My trans guy charges $200 labor to bench build it
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