Clearly the locking nuts have been reused (which IMO is bad practice, also the stake is in the different location which may indicate the torque is wrong) but to me the bearings look used. They are discolored around the circumference where I would expect new bearings to be shiny. What do you think? The rebuilder said this would have new synchros, bearings, and seals.

I became suspicious when he said these transmissions normally only last 3 years and 30k miles before requiring rebuild, which clearly is BS. M5R1 / M5OD 5-speed manual transmission from a 98 Explorer, these were also used on Rangers, Broncos, and F150s.

EDIT: The transmission was delivered without the extension housing, so the parts below were exposed without any disassembly.

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  • 2
    How can you assume the torque is wrong just by the stake being in a different position - it may have needed different shims to set the relevant pre-load and is adjusted perfectly. Bearings can be re-used if they show no signs of wear. I rebuilt a transmission that had done 100K and only replaced two of the 5 bearings... – Solar Mike Dec 8 '18 at 21:12
  • The rebuilder said it would have new bearings - but you are saying that a "typical" rebuild typically will reuse bearings if they are still OK? – masospaghetti Dec 8 '18 at 21:33
  • I believe my comment is clear on that point.... However, it depends on the shop, some will change ALL bearings just to be able to say they changed ALL bearings even if some of the other bearings were still serviceable. – Solar Mike Dec 8 '18 at 21:34
  • Saying they "can" be re-used is different than saying the transmission is going to be rebuilt and also explicitly telling a customer that the parts will be new. I always assumed it was a rebuild item if the case was opened, but if not, I am less worried about it. – masospaghetti Dec 8 '18 at 21:36
  • You did not state in your question that the bearings were said to be "new" by the rebuilder. Either you are leaving out details pertinent to the question or are not asking that which you really wish to ask. – Solar Mike Dec 8 '18 at 21:38

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