Technical Scraping sound after shifting gear

[lunotic]

I've been noticing a scraping sound, two or three seconds after shifting from second to third gear. This happened on the highway when my Uno fire 1.0 developed an oil leakage. I must have driven for about hundred kms with low oil.

I took the car to the workshop and got the leak fixed and replaced the transmission oil. (Two litres)

When I drove out of the workshop, the sound was still there. It's audible especially during night when there's no other sound.

The owner of the workshop assures me that there is no problem.

l'uno-tic!

 

[alexGS]

I'm sorry but I think you're going to have to describe the sound a little more. It starts a couple of second after changing gear... and then, how long does it go on for? Is it only in one gear? Is it a regular sound like a turf-turf-turf noise? 'scraping' could mean any sound from a rusty farm gate hinge to a violin.

Can you get the same noise with the car stationary and the engine idling?

-Alex

 

[lunotic]

Thanks, Alex for the prompt reply.

The sound occurs only after I shift from second to third. There is absolutely no problem after that. It is not the gear sound that comes when you do not depress the clutch fully. This is more like something engaging too slow.

I had done a fairly long road trip (2500 kms) at the stretch recently. Before the trip, I renewed the timing belt, tensioner, alternator bearing and belt, suspension bushes, air-con bearing & belt and the silencer gasket.

The engine vibrates a lot now and cd player keeps shutting down during idling. I am sure it is not normal. The engine sounds a bit gruff and the vibrations creep to the steering wheel and floor.

I hope this bit of background info is useful.

Please help.

L'uno-tic

 

[rawill]

Does it still start OK. You couldn't possibly have got something wrong with the cambelt and valve timing have you. Is it down on power.

In any case if it was ok before, double and triple check everything you did. Surely it must be there among the things you did.

 

[Ucof]

My cd player kept turning off randomly too.

I just reconnected all the wires, and it works fine now...

 

[lunotic]

Thanks Alex, Ucof and rawill for the replies.
I read a post here about a good thrashing doing errant Uno's a lot of god and tried that out. I went on a 1050 km trip and had a whale of a time. The car performed beautifully and I took her for a service soon after that.

The mechanic found out that the fuel filter had been installed incorrectly and that may have caused the engine vibration. Now the car starts at half crank and the vibration has almost disappeared.

The gearshift sound is still there but that happens when I take my foot off the clutch very slowly after shifting. I changed my driving style a bit. Now I drive like an Italian

The problem is no longer there.

 

[Ucof]

Thanks Alex, Ucof and rawill for the replies.

Hey, you see those "Thumbs up" icon next to our posts?


Glad you got it sorted though.

 

[alexGS]

It's OK, I'm still at a loss to explain the cause of the sound

Something that should be done to all Unos (that don't have a hydraulic clutch) periodically is this:

- Get some grease, such as the sticky red type, or the slippery grey type, or even the spraycan white type (the spray type won't last as long but is quicker to apply).

- Get your head near the pedals by climbing into the footwell

- Use a fingernail to release the small clip on the clutch pedal pin and slide it off carefully.

- Lift the clutch pedal by hand and remove the cable from it. Let the pedal down to the floor.

- Apply grease generously to the pedal pin, the cable eye, the pedal pivots, and a little to the cable itself where it disappears at the bulkhead

- In the engine bay, apply grease generously to the semicircular block on the clutch arm (on top of the gearbox) and also around the pivot pin for the clutch arm itself (the rust is superficial since it's thick steel). If the cable rubber boot has disintegrated, apply some grease to the inner cable too and inspect for broken strands where the threaded end meets the cable.

- Back inside the car, lift the pedal and refit the cable and clip.


This needs doing once every few years and avoids all sorts of creaks, squawks, and jerkiness with clutch engagement - which, depending on the speed of clutch engagement, may not be noticeable in all gears, so I wonder whether it might be a contributing factor to the odd sound.

If the Uno in question has a hydraulic clutch... you might need to replace the slave cylinder on the gearbox - they rust See Louie's excellent post at https://www.fiatforum.com/uno/29364-hydraulic-clutch.html . A real benefit of this forum is that - unlike much of the Internet - this isn't some brief flash-in-the-pan, we're actually here for the long haul Advice from four years ago is just as useful as advice today...

-Alex

 

[rawill]

True about the long term help, just like Saabcentral, my favourite Saab site.

Thank you to all the people on here, mods and ordinary Fiat owners who contribute. Often enough there is more expert help here than from the "experts".