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T5- Grinding when coasting to a stop

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Old Sep 8, 2013 | 02:58 AM
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From: Rugby, England
Car: 1988 IROC Vert
Engine: 355 ZZ4
Transmission: T5 Manual
T5- Grinding when coasting to a stop

This problem seems to keep coming back. Been through a few new thrust bearings and it goes away for a while.

It's a rebuilt T5 with aftermarket gears and G Force case. Shifts really smooth, no problems anywhere except:

Occasionally when you slow down and put it in neutral or hold the clutch in it makes a grinding noise you can feel through the car. Only happens once in a while sometime just ticking over in gear it will do the same thig.

Driving me insane- any suggestions?

Many thanks.
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Old Sep 15, 2013 | 05:06 AM
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From: Rugby, England
Car: 1988 IROC Vert
Engine: 355 ZZ4
Transmission: T5 Manual
Re: T5- Grinding when coasting to a stop

Need some advice on this please someone. It's not terminal grinding yet but seems to be getting worse.
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Old Sep 15, 2013 | 11:40 AM
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From: Aridzona
Car: `86 SS / `87 SS
Engine: L69 w/ TPI on top / 305 4bbl
Transmission: `95 T56 \ `88 200-4R
Re: T5- Grinding when coasting to a stop

Gearset issues wouldn't tend to be fleeting as you've described.

Throwout bearing is what it sounds like.

If you push the clutch in, pull out of 4th and into neutral and it does it;
But you leave the clutch pedal be, pull out of 4th and it doesn't do it,
Then I'd consider the TOB a suspect of the noise.
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Old Sep 16, 2013 | 02:18 PM
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From: Rugby, England
Car: 1988 IROC Vert
Engine: 355 ZZ4
Transmission: T5 Manual
Re: T5- Grinding when coasting to a stop

Hey jmd- many thanks for responding with sound advice. So pop it out of 4th and coast without clutch and see if it does it?

Thanks a million
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Old Sep 10, 2014 | 07:40 AM
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From: Rugby, England
Car: 1988 IROC Vert
Engine: 355 ZZ4
Transmission: T5 Manual
Re: T5- Grinding when coasting to a stop

New beefier TOB and 200 miles later the sound is back. This time I used the self aligning bearing. Was perfect but now the sound is back.

Could it be related to alternator/ PS pump/ Flywheel or starter re-engaging?
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Old Sep 11, 2014 | 02:22 PM
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From: Rugby, England
Car: 1988 IROC Vert
Engine: 355 ZZ4
Transmission: T5 Manual
Re: T5- Grinding when coasting to a stop

Right managed to capture it making the noise. I really need help with this.
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Old Sep 12, 2014 | 08:00 AM
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Car: 1988 IROC Vert
Engine: 355 ZZ4
Transmission: T5 Manual
Re: T5- Grinding when coasting to a stop

Need help guys. Mechanic not helping me at all.
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Old Sep 13, 2014 | 04:07 PM
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From: Rugby, England
Car: 1988 IROC Vert
Engine: 355 ZZ4
Transmission: T5 Manual
Re: T5- Grinding when coasting to a stop

Yesterday the clutch pedal went to the floor.. Couldn't select gears. Pumped it a few times and it came good.
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