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Old 17-06-2012   #1
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Won't go into reverse w/out grinding only when hot

Hi,

I know this gearshifting issue has been raised a few times, but no one has ever stated that their problem occurs when hot, so I thought I might have a new slant on the problem. Here's what I've done so far:

First of all I have a 2009 Doblo 1.9 mjet with 105 hp and approx 55 000 km.

What's happening: Car shifts like butter when cool and under normal running temperatures...although the reverse gear often gave a slight clunk right from new.

When the car is run in traffic or in very hot weather it becomes harder to put in any foreward gear, but it's not really problematic. Reverse, however results in a grind/grate and only after shifting into other gears before shifting again in reverse wil it actually go into reverse gear -and with a grind...though not always (to make things fun). Generally the problem is getting worse.

Here's what I've done so far:
1.Bled clutch fluid
2.Checked gear oil level
3. Checked clutch pedal free play - it's at about 1.2 cm which I think is excessive as my Punto's free play is only 0.5 cm. If someone could check theirs, I would be grateful.
4. I've tried shifting into other gears before reverse and it doesn't seem to matter which one I try. Sometimes 2nd helps more, sometimes 3rd.
5. With the engine off everything shifts fine and smoothly, so I've eliminated the cables as a reason.

Could my clutch pedal travel be off/short by a few mm and because of this thermal expansion is preventing the clutch from releasing properly?
I can't believe that after 55k the clutch is the issue - I won't believe it
So I search for a simpler solution

Any help would be appreciated.
Cheers,
Tom
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Old 18-06-2012   #2
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Re: Won't go into reverse w/out grinding only when hot

Just an update - removing the floormat seems to have helped. I guess it was a question of a couple of milimeters. Still doesn't change the fact that the bite point is so ridiculously low. The car was like that since new (more or less), so I assumed that was normal.

Do the Doblo's tend to have a low clutch bitepoint?
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Old 19-06-2012   #3
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Re: Won't go into reverse w/out grinding only when hot

my clutch bite point is really low. Had 4th gear replaced, new clutch & flywheel in Nov & done 11k since then. Reverse grinds nearly every time
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Old 20-06-2012   #4
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Re: Won't go into reverse w/out grinding only when hot

just modified my floor mat & now it goes into reverse ok spot on! Wouldn't mind but the mats aren't that thick & it hadn't moved too far forward! can't believe how low the biting point is on these

Nearly everything i've owned/driven before you could change gear without having to push the pedal all the way down with no probs at all
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Old 21-06-2012   #5
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Re: Won't go into reverse w/out grinding only when hot

Mine's an '03 (90,000) and yes, the bite point is really low. Putting it in reverse has to be done carefully.
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Old 21-06-2012   #6
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Re: Won't go into reverse w/out grinding only when hot

Quote Originally Posted by newportz View Post
Just an update - removing the floormat seems to have helped. I guess it was a question of a couple of milimeters. Still doesn't change the fact that the bite point is so ridiculously low. The car was like that since new (more or less), so I assumed that was normal.

Do the Doblo's tend to have a low clutch bitepoint?
All Clutches can be adjusted to a desired bite point. im not sure how your clutch cable is assembled. but for example: my partner has a cinquecento and her gears were allways grinding. i just adjusted the clutch cable untill the biting point was not so low, all problems sorted.

if you dont know how to do it, just pop to your local garage and ask them to adjust the clutch, shouldnt take any longer than 20 mins. and wont cost much either.
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Old 21-06-2012   #7
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Re: Won't go into reverse w/out grinding only when hot

Doblo cutches are hydraulic.
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Old 21-06-2012   #8
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Re: Won't go into reverse w/out grinding only when hot

Quote Originally Posted by Ulpian View Post
Doblo cutches are hydraulic.
yep, what he said!
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Old 28-06-2012   #9
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Re: Won't go into reverse w/out grinding only when hot

Yeah, it's nuts that the carpet makes such a difference on these things. While most of my problems with the grinding went away with the carpet adjustment, I would still get the intermittent grind in reverse. I did one more thing that (so far) eliminated the problem for good - loosen up the two bolts on the slave cylinder and you'll see that there is some side to side play. I held the slave cylinder over to the left and tightened the bolts again which probably gave me another 1.5mm of squeeze on the pressure plate.
Still, this can't be normal and seeing as how many people on this forum have replaced their clutches between 30k and 50k, I'm beginning to psych myself up for a clutch job :P

For now, I'm playing it by ear and gently shifting

Cheers
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Old 28-06-2012   #10
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Re: Won't go into reverse w/out grinding only when hot

Mine has the ususal foibles but has done 90,000 so far and the clutch is still as Dobloesque as ever

Just been looking at the Dacia Duster. This has pretty much all my old Doblo has, plus a bit, for 13,000. Better performance and much better promised economy too. But no option of a spare wheel - boo-hoo!

I have to say I was impressed though. This is the same price as a similarly specced Qubo, cheaper actually

Mmmmmmm??????
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Old 28-06-2012   #11
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Re: Won't go into reverse w/out grinding only when hot

Dacia, yeah they do seem value for money no frills motoring. Yet to see one.
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Old 28-06-2012   #12
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Re: Won't go into reverse w/out grinding only when hot

You won't until next year, they arrive in January. Renault showrooms have left hand drive ones with the 'old' dashboards so that we can take a look though. Thousands on the continent though. The Duster was the second most reliable car in Germany last year apparently

I've just been configuring new Doblos and Qubos...

Decisions decisions eh!
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Old 29-06-2012   #13
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Re: Won't go into reverse w/out grinding only when hot

Just a quick thought/suggestion,do the Doblo's have the sneaky bleed nipple on the bulkhead for bleeding the clutch,like the Multiplas do??
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Old 29-06-2012   #14
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Re: Won't go into reverse w/out grinding only when hot

Has no one tried to adjust the rod length yet on the clutch master cylinder?

Nearly if not all clutch/brake cylinder rods are adjustable. Just a thought.

Also OEM Brake/clutch flexible hoses can swell like a MOFO, replacing them with a braided equivalent can do soo much to the feel of the clutch.
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Old 29-06-2012   #15
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Re: Won't go into reverse w/out grinding only when hot

my multipl jtd the same cool weather drives great hot weather comes and i strugle with gears,reverse can be terible,so much knowledge on here someone should no what the problem is,also changed the crank sensor 2 years ago trouble starting the car again how long should they last ?
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