Drivetrain - desroyed output bearing F-4eat | Ford Escort Owners Association (FEOA)
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Drivetrain desroyed output bearing F-4eat

Discussion in 'Drivetrains' started by salvageyard saviour, Aug 29, 2016.

  1. salvageyard saviour

    salvageyard saviour FEOA Member

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    I took the pan off a 95 LX to change the filter and found huge metal shavings.
    At one time I remember a hard bang and grinding noise, but also run away shift and delayed 1st engagement.
    When disassembling I found a screw from the valve body also in the pan. The trans appears to have been re-built at some point. Everything looked way to good for 200k. When I got to the differential I found a broken tooth on ring gear and also on the idler gear. I took the gear cover off and saw one of the alignment pins missing and the bearing exploded.
    The pre load of the idler seemed real tight. Does anyone think the failure happened from the pre loads too tight? or did something else get in the gears to brake the teeth and damage the bearing?
    The metal doesn't seem to have gotten too far through the rest of the trans. Is it likely that the shift issues are separate?

    Output gear and bearing.jpg Output gear and bearing 2.jpg
  2. denisond3

    denisond3 Moderator Staff Member

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    I dont think the preload had anything to do with the bearing failure. In fact I could imagine the amount of force it took to break off that tooth might have shifted the gear cover and resulted in more preload than normal. Or the broken bits of the gear tooth caused the bearing failure.

    The loose screw that came from the valve body is not likely to have had any effect on anything. The two small screws position the thin metal separator plate that goes between two of the four layers of the valve body, and once the valve body is bolted together and in-place, I would think the screws are not necessary. The separator plate that is held in place also would have had a gasket on each side of it; sandwiched in between two layers of the aluminum valve body.
    zzyzzx likes this.
  3. salvageyard saviour

    salvageyard saviour FEOA Member

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    I didn't think so. The race didn't look burnt. You're probable right, the force of whatever got chewed smashed the bearing.
    What would've been that big that could've gotten in there? The missing alignment pin maybe?
    I guess it doesn't matter now. I'm putting it back together now with the gear set from my other trans. They felt a little loose, so I did the shims by feel. (They used to keep rolling after spinning by hand and wiggled a bit.) They're slightly snug now.

    I think it only drove about 50 miles like this and I didn't see any metal flakes in the clutch packs or needle bearings, do you think the flakes could've gotten anywhere else? These shavings and flakes are big.

    Should I replace the little screws or just leave it?
  4. denisond3

    denisond3 Moderator Staff Member

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    I would replace the little screws.
    I dont know where metal any flakes might have gotten. Most of them of course would get stopped by the pickup filter on the bottom of the valve body. Since you will have the oil pump housing removed from the trans, I would definitely dismantle its bolts and make sure its all clean inside, including the relief valve being free to move in-out.

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