Question about Toyota MR2

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1991 mr2 turbo... experienced a light repeated thud upon aggressive acceleration coming from what i thought was the left rear wheel or left transaxle. 4 days later the sound of screeching popping and grinding forced me to exit the freeway. clutch was chirpy but functional still and gears shift properly the motor purrs like a kitten. upon closer inspection the crunching and grinding is coming from inside the upper drive axle boot. is any of this making sense? whats wrong?

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  • herman1138 Aug 07, 2010

    1991 mr2 turbo... experienced a light repeated thud upon aggressive acceleration coming from what i thought was the left rear wheel or left transaxle. 4 days later the sound of screeching popping and grinding forced me to exit the freeway. clutch was chirpy but functional still and gears shift properly the motor purrs like a kitten. upon closer inspection the crunching and grinding is coming from inside the upper drive axle boot. is any of this making sense? whats wrong? and how expensive are the possible broken parts?

  • herman1138 Aug 07, 2010

    azraelsrl really spoke my language...

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  • Toyota Master
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The thud was the engine detonating - low quality fuel is the usual cause for that, unrelated to the other problem.
The crunching and popping are the signs of a failed bearing (or U-joint in your case) - take the shaft out and check the joint, if it has even the slightest play then it must be replaced.

Posted on Aug 07, 2010

  • herman1138 Aug 07, 2010

    i use v power in it. . the thud was more of a wobble mixed with a thud like the left drive axle was behaving similar to an uneven load of clothes going into the spin cycle on a washing machine. u sure the thud is from bad gas? seriously

  • Azrael SRL Aug 07, 2010

    If the noise was more of a wobble mixed with a thud then it's definitely related to the other problem: the u-joint has failed and must be replaced. Find a replacement at a junker's yard, it will be a lot cheaper than ordering a brand new part.


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  • Master
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Sounds like a bad CV Joint or Differential unit. have them checked or check them yourself. I recommend the Haynes Repair manual on your vehicle for the service procedures on these.

Posted on Aug 07, 2010

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Check this link out John - see if it helps
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Where is the dipstick mr2? In: Toyota MR2 [Edit categories]
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www.facebook.com/EverythingMR2

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