Loud thud on front driver side

Discussion in 'Mazdaspeed 6 Transmission/Drivetrain' started by Bobbytron21, Feb 17, 2024.

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  1. Bobbytron21

    Bobbytron21 Greenie N00B Member

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    I just replaced the engine with a jdm 60k mile engine. This came with it's own set of issues but its been on the road for a day now and now there's a loud thudding coming from the front left tire. There is no grinding noise like a bad bearing, but a thud every wheel rotation so it gets faster with speed. The wheel has no play and I'm still trying to rule out of its a bushing, my main worry is if its in the tranny or transfer case? If anybody has experienced this I would love to know where to look!
     
  2. Bobbytron21

    Bobbytron21 Greenie N00B Member

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    Update: I've looked deeper into the whole front end assembly and my biggest note is fluid leaving from where the driver side axel meets the transmission. I feel like its most likely a torn bool leaking grease but it also could be transmission fluid. I'm going to pull the axel out and update on what I see.
     
  3. Raider

    Raider Administraider Administrator Platinum Member

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    Could be an axle seal. Also that jdm engine....oh boy. I would not turn up the power on it.
     
    Raider, via an iPhone, Feb 18, 2024
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  4. Bobbytron21

    Bobbytron21 Greenie N00B Member

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    Yeah the engine was in rough shape, turbo was shot and had to transfer the old one. In other news I am replacing the axel seal, axel, and bearing. The left engine mount wasn't fully tightened which caused it to drop ruining the front left driveline components:(
     
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  5. Raider

    Raider Administraider Administrator Platinum Member

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    OOF. That has happened. OEM mounts suck. Red loctite and proper torque gave me no issues.
     
  6. Bobbytron21

    Bobbytron21 Greenie N00B Member

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    One new oil seal, axel and bearing later the problems solved! learned a lesson on taking my time, this was completely avoidable. This ended up ripping the cv boot on the front of the driveshaft as well… luckily there’s a thread here on replacing that boot, though it was an annoying job to do
     
    Bobbytron21, via an iPhone, Apr 25, 2024
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