5th gear whine?

  1. Saxperience Hardcore! Joined: Oct 2005 Aycliffe Posts: 32205 Saxo VTS
    #1
    Sup all. Just finished fitting a newish box to the car. And bit of a problem.... All gears sound fine but 5th has this whine/sing to it and I'm buggered if I know why. I did have to rebuild 5th before I put it on but I'm certain I did this right. The difference was I put an output 5th gear pinion with a roller bearing built in instead of a non-roller bearing type. Could it be this???

    Any suggestions or guesses would be brill.

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  2. Saxperience Post Whore Joined: Aug 2009 ilkeston derbyshire Posts: 9823 C2 VTR stripped, 406hdi, clio 172
    #2
    what parts did you change on 5th? if the gears were out of different gearboxes, that'd probably explain it as the wear patterns/tooth contact would be slightly mis-matched
  3. Saxperience Hardcore! Joined: Oct 2005 Aycliffe Posts: 32205 Saxo VTS
    #3
    I changed the output pinion, the sync ring, the sync mechanism - the reason I did this was because I couldn't turn the gearbox by hand if I selected anything but 5th - it was jamming by the looks of things. When I put the 5th pinion with the roller bearing it turned freely.

    Wonder if it would have jammed had it had the engine rotating it
  4. Saxperience Forum Bum Joined: Mar 2007 127.0.0.1 Posts: 4826 oem+ sax
    #4
    Adsayer obviously your box is rebuilt mines whined in fifth for 30k or so still going strong it's just transmission noise to me. I added some wynns gearbox treatment which made it abit quieter.

    I drive new cars at work that whine more than mine so stopped worrying.
  5. Saxperience Hardcore! Joined: Oct 2005 Aycliffe Posts: 32205 Saxo VTS
    #5
    This isn't a typical gearbox whine dude. This is loud(ish)!
  6. Saxperience Post Whore Joined: Nov 2010 Kent Posts: 8439 Gen 7 Celica 190.
    #6
    Should hear mine in 5th at about 40 it almost makes my ear's bleed. Been fine for 6000 miles though.