Gearbox problem. BA7/5 fitted to my 504.
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Thread: Gearbox problem. BA7/5 fitted to my 504.

  1. #1
    Fellow Frogger!
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    Default Gearbox problem. BA7/5 fitted to my 504.

    Hi All,

    I have fitted a fully reconditioned BA7/5 gearbox to my 504. Problem is, it won't stay in fifth gear.

    I have checked to see if the selector or the selector rods foul on anything and/or if the gear stick is obstructed by the console. I did have to tap out the transmission tunnel to make it perfect, but now, nothing at all is stopping the full movement of the selector.

    All other gears seem fine. And at first, so does fifth gear.

    All gears are easily selected.

    This is what I have noticed:
    If coasting down hill, for example, in fifth, suddenly the revs will return to idle. There is nothing more to it than that. It's fallen out of gear and is in neutral. Of course if I don't notice this and give it some gas, the engine does a big free spin.

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    I am unsure if it will jump out of gear under acceleration.

    My question is this. Could this possibly be caused by an incorrect adjustment of the selector rods? Or could the gearbox itself be at fault?

  2. #2
    1000+ Posts BIGRR's Avatar
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    Jump underneath with a torch (& a mirror) and have someone operate the gearbox through all the gears and see if when the gearstick is moved toward fifth, that the 5th operating lever travels full throw or it is being held back. Sounds like linkage adjustment to me (seeing that the box has been overhauled).
    (I have never seen a five speed box).


    Good luck.

    Is it a blue or yellow 504?
    Present fleet:-
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    Renault 72' 16TS from new
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  3. #3
    Fellow Frogger!
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    since the 504 was never manufactured with the ba7/5, you certainly had to do a custom shifting mechanism, most likely that's the problem.

  4. #4
    Fellow Frogger!
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    I'll try what you suggest, BIGRR. In this case the 504 in question is blue.
    You are right, 2pac. The mechanism is from a 505.

  5. #5
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    Quote Originally Posted by tonch504 View Post
    I'll try what you suggest, BIGRR. In this case the 504 in question is blue.
    You are right, 2pac. The mechanism is from a 505.
    and where did you get the gear stick from?
    even if it's too from a 505, the distances from the stick to the gearbox are different.

  6. #6
    Demannu-facturing! Demannu's Avatar
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    I had a 'fully reconditioned' BA7/5 in my 505 wagon. It kept falling out of gear when transitioning from coast to power and visa-versa.

    I climbed underneath and checked all the linkages - all good.

    Turned out that the guy who 'fully reconditioned' this 'fully reconditioned' gearbox had forgotten to fit the detent ball and it's spring on the 5th/reverse selector rod.

    Luckily I was able to find one and fit it from underneath the car - two minute job once I worked out what was wrong.

    Could be a similar scenario for you.
    BIGRR, bahay and Roland like this.
    Scotty

    Melbourne - Dandenong Ranges

    1956 Peugeot 403 - 'Francois' - resto project

    1969 Peugeot 504 - 'Pascal' - daily driver project

    1970 Peugeot 404 Utility - 'Brutus' - resto project

    1978 Peugeot 604 - as yet unnamed - V6 on straight LPG

    1987 Peugeot 505 - as yet unnamed - project car

    1999 Peugeot 406 Coupé - 'Chloe' - 5 speed manual

    2011 Peugeot 3008 XTE HDi - 'Zoe' - hatchback on steroids

    2014 Peugeot RCZ - 'Remy'

    1999 Range Rover 4.6 HSE - 'Grover' - tow car

  7. #7
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    how do you do that?
    do you have to dismantle the rear casing?

  8. #8
    Demannu-facturing! Demannu's Avatar
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    Quote Originally Posted by 2pac View Post
    how do you do that?
    do you have to dismantle the rear casing?
    Nope, there's a small allen-head plug on the bottom of the gearbox that provides access to the tube that the ball and spring live in.
    Gearbox problem. BA7/5 fitted to my 504.-ba7-detent-ball-spring.jpg
    Scotty

    Melbourne - Dandenong Ranges

    1956 Peugeot 403 - 'Francois' - resto project

    1969 Peugeot 504 - 'Pascal' - daily driver project

    1970 Peugeot 404 Utility - 'Brutus' - resto project

    1978 Peugeot 604 - as yet unnamed - V6 on straight LPG

    1987 Peugeot 505 - as yet unnamed - project car

    1999 Peugeot 406 Coupé - 'Chloe' - 5 speed manual

    2011 Peugeot 3008 XTE HDi - 'Zoe' - hatchback on steroids

    2014 Peugeot RCZ - 'Remy'

    1999 Range Rover 4.6 HSE - 'Grover' - tow car

  9. #9
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    That is an interesting one, Demannu! Will have to check that. Thanks.

  10. #10
    Fellow Frogger!
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    Just for the purpose of an update. The problem is fixed, but, I'm not sure how.
    I removed the plug and found a detent ball and spring were installed. So I put it back together, refilled the oil and went for a drive. Problem gone!
    BIGRR likes this.

  11. #11
    Demannu-facturing! Demannu's Avatar
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    Perhaps some gum or grit had jammed the ball? Oh well, all's well that ends well!

    Thanks for the update, nice to get some closure
    Scotty

    Melbourne - Dandenong Ranges

    1956 Peugeot 403 - 'Francois' - resto project

    1969 Peugeot 504 - 'Pascal' - daily driver project

    1970 Peugeot 404 Utility - 'Brutus' - resto project

    1978 Peugeot 604 - as yet unnamed - V6 on straight LPG

    1987 Peugeot 505 - as yet unnamed - project car

    1999 Peugeot 406 Coupé - 'Chloe' - 5 speed manual

    2011 Peugeot 3008 XTE HDi - 'Zoe' - hatchback on steroids

    2014 Peugeot RCZ - 'Remy'

    1999 Range Rover 4.6 HSE - 'Grover' - tow car

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