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Reverse Clunk


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#1 MattJakeT

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Posted 19 July 2014 - 05:02 PM

Again sorry if this topic has been discussed many times... 

 

Love the fiesta, however even when engaging reverse at idle there is a definite clunk and almost judder from the gears (only for a second or two), more so than other cars i have been in. The only way I have been able to combat this so far is to push it into 3rd then revers, or wait 5 seconds after the clutch is down. 

 

Not that much of an issue to be frank but is it more of a feature on the mark 7s or should I get it looked at? 

 

Cheers 

 

Matt 



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#2 khevolution

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Posted 19 July 2014 - 07:12 PM

believe this is a quirk of the gearbox I'm afraid and there is no syncro in reverse gear like most gearboxes, so you do have to push the clutch down for 3-5 seconds to wait for the gears to slow down before engaging.

Been told it was part of the cost cutting measures when developing the car, personally i think its a stupid idea



#3 M4RC

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Posted 19 July 2014 - 07:20 PM

Yeap that's a fiesta...

#4 Stoney871

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Posted 19 July 2014 - 08:04 PM

Put it in neutral and pump the clutch pedal a couple of times.
Not sure if it's more about this causing you to wait a couple of seconds before selecting reverse or if the pumping actually does something but it always worked on my mk1 Focus :D

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#5 MattJakeT

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Posted 19 July 2014 - 08:16 PM

Thanks guys


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#6 MattDRX

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Posted 20 July 2014 - 03:46 PM

Mine doesn't do that? Mine goes straight in without clunkyness.

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#7 Jake90087

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Posted 20 July 2014 - 06:26 PM

Mine doesn't do that? Mine goes straight in without clunkyness.

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The ST has a 6spd which is a different gearbox, so has a synchro on reverse. But the IB5 which is on lots of 5spd Fords and is pretty ancient now does not have one on reverse... Hence the clunk/grind/can't get it into reverse because the mountains of the cogs hit.



#8 Zico

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Posted 21 July 2014 - 10:34 AM

So when the gearbox is knackered overtime, could you not argue this is a known fault due to the design?

#9 Jake90087

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Posted 21 July 2014 - 10:41 AM

Honestly I wouldn't think so. The lack in a synchro won't break the gearbox over time, crunching the gears and trying to change as fast as possible will do it.


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#10 Maxxxykins

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Posted 21 July 2014 - 12:33 PM

My old Zetec did this, but my Titanium doesn't, both MK7's,

I took it to Ford and they couldn't recreate it, so I sat there and did it myself and it made a disgusting noise.

They took another look at it, said they couldn't find anything out of the ordinary but they must of done something because if it ever did make a noise it was a lot shorter and quieter, and it did it less often. Strange.



#11 kevzs960

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Posted 21 July 2014 - 12:40 PM

Probally stuck a banana in the gearbox to quieten it down lmao.

Some times its easier to put it into 3rd then reverse. Standard ib5 gearbox im affraid

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#12 Maxxxykins

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Posted 22 July 2014 - 07:09 AM

I found that putting it into first before you reverse helped a lot, think this is something to do with the first and reverse in the fiesta, basically being the same gear.


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#13 kevzs960

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Posted 22 July 2014 - 02:03 PM

Think someone previous said about it. But ill repeat lol reverse is a straight cut gear in the ib5 gearbox. Theres no syncromesh on it. So its like a curve going into a straight. Plus i cant remeber if there is a baulk ring on them to slow down the speed enough to let t engage correctly. Been a while since i last stripped one down

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