Confirm Bearing Noise Problem

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Justice777
Posts: 54
Joined: Wed Sep 27, 2017 8:55 pm
Your car is a: 1978 Spider 124 5 spd
Location: Southern Maine

Confirm Bearing Noise Problem

Postby Justice777 » Fri Nov 24, 2017 12:43 pm

Think I'm on the right track but feel the need to confirm.
Trans / clutch area noise - engine running, trans in neutral, sounds like a dry bearing sound, with clutch pedal up. Sound goes completely away when clutch pedal depressed.
Have I read correctly that this is trans input shaft (aka pilot) bearing noise?

Follow up question - If I use (yet to purchase) a Harbor Freight Low Lift trans jack, will I be able to get car high enough on jack stands to roll trans out from under it? HF specs state min. jack height is 7 1/4". Anyone know how high / tall is bell housing?

Edit: Can't seem to locate my 24", 3/8" drive extension. Should I purchase a 1/2" drive extension assortment instead of 3/8" drive? I know I'll need a long ratchet extension to reach top bell housing bolts.


Thanks for all your help!

bobplyler
Posts: 644
Joined: Sat Jan 30, 2010 7:58 pm
Your car is a: 1979 spider 2000
Location: Charlotte, NC

Re: Confirm Bearing Noise Problem

Postby bobplyler » Fri Nov 24, 2017 3:21 pm

Sounds like the pilot bearing
1979 Fiat Spider (since new)
2005 Lincoln LS (the wife's car)
2003 Chevrolet Cavalier (daily driver)
1999 Honda Shadow VLX 600
1972 Grumman Traveller 5895L (long gone).

zachmac
Posts: 1146
Joined: Sun Aug 24, 2008 9:20 am
Your car is a: 1978 Spider [1979 2 ltr engine]
Location: Aiken, SC

Re: Confirm Bearing Noise Problem

Postby zachmac » Fri Nov 24, 2017 4:39 pm

Justice777 wrote:Think I'm on the right track but feel the need to confirm.
Trans / clutch area noise - engine running, trans in neutral, sounds like a dry bearing sound, with clutch pedal up. Sound goes completely away when clutch pedal depressed.
Have I read correctly that this is trans input shaft (aka pilot) bearing noise?

Follow up question - If I use (yet to purchase) a Harbor Freight Low Lift trans jack, will I be able to get car high enough on jack stands to roll trans out from under it? HF specs state min. jack height is 7 1/4". Anyone know how high / tall is bell housing?

Edit: Can't seem to locate my 24", 3/8" drive extension. Should I purchase a 1/2" drive extension assortment instead of 3/8" drive? I know I'll need a long ratchet extension to reach top bell housing bolts.


Thanks for all your help!


Definitely sounds like pilot bearing noise BUT before you drop the tranny try adjusting the clutch. An iout of adjustment clutch can cause throw out bearing "rattle".
Jeff Klein, Aiken, SC
1980 FI Spider, Veridian with Tan (sold about a year ago), in the market for another project
2009 R350 Mercedes, family hauler
2005 S600 Mercedes V12, 620 hp, 740 ft lbs torque

User avatar
Nanonevol
Posts: 647
Joined: Thu Nov 13, 2014 9:17 am
Your car is a: 1977 Fiat 124 Spider
Location: Medway, Massachusetts

Re: Confirm Bearing Noise Problem

Postby Nanonevol » Fri Nov 24, 2017 4:52 pm

Should you drop the trans, you will need extensions. I don't recall the formula of wrenches but a long and a shorter extension and a swivel. I think 1/2" should be fine.
1977 Fiat Spider
1967 Triumph Bonneville (hardtail chopper)

Justice777
Posts: 54
Joined: Wed Sep 27, 2017 8:55 pm
Your car is a: 1978 Spider 124 5 spd
Location: Southern Maine

Re: Confirm Bearing Noise Problem

Postby Justice777 » Sat Nov 25, 2017 6:50 am

zachmac wrote:
Justice777 wrote:Think I'm on the right track but feel the need to confirm.
Trans / clutch area noise - engine running, trans in neutral, sounds like a dry bearing sound, with clutch pedal up. Sound goes completely away when clutch pedal depressed.
Have I read correctly that this is trans input shaft (aka pilot) bearing noise?

Follow up question - If I use (yet to purchase) a Harbor Freight Low Lift trans jack, will I be able to get car high enough on jack stands to roll trans out from under it? HF specs state min. jack height is 7 1/4". Anyone know how high / tall is bell housing?

Edit: Can't seem to locate my 24", 3/8" drive extension. Should I purchase a 1/2" drive extension assortment instead of 3/8" drive? I know I'll need a long ratchet extension to reach top bell housing bolts.


Thanks for all your help!


Definitely sounds like pilot bearing noise BUT before you drop the tranny try adjusting the clutch. An iout of adjustment clutch can cause throw out bearing "rattle".


Thanks everyone.
I know that clutch pedal / friction starts at around 1/2 way from the floor which is not where I'd like it to grab.
Any idea if I should adjust cable shorter or longer or just try both and listen for change in noise?

zachmac
Posts: 1146
Joined: Sun Aug 24, 2008 9:20 am
Your car is a: 1978 Spider [1979 2 ltr engine]
Location: Aiken, SC

Re: Confirm Bearing Noise Problem

Postby zachmac » Sat Nov 25, 2017 7:37 am

There are a couple of good you tube videos on the clutch adjustment. Basically you should only have about 1 inch of travel before the clutch starts to engage. Sounds to me like you need to shorten it up quite a bit.
Jeff Klein, Aiken, SC
1980 FI Spider, Veridian with Tan (sold about a year ago), in the market for another project
2009 R350 Mercedes, family hauler
2005 S600 Mercedes V12, 620 hp, 740 ft lbs torque

Justice777
Posts: 54
Joined: Wed Sep 27, 2017 8:55 pm
Your car is a: 1978 Spider 124 5 spd
Location: Southern Maine

Re: Confirm Bearing Noise Problem

Postby Justice777 » Tue Dec 05, 2017 12:24 pm

Thank you. 1" off floor is exactly where I like it to grab.

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KevAndAndi
Posts: 531
Joined: Fri Oct 03, 2014 12:14 pm
Your car is a: 1981 Fiat Spider 2000
Location: Chatham, NJ

Re: Confirm Bearing Noise Problem

Postby KevAndAndi » Tue Dec 05, 2017 4:46 pm

That 1” of travel is supposed to be at the top, not the bottom. I don’t think you would ever get the clutch to grab with the pedal 1” off the floor.
Kevin
1981 Spider 2000

zachmac
Posts: 1146
Joined: Sun Aug 24, 2008 9:20 am
Your car is a: 1978 Spider [1979 2 ltr engine]
Location: Aiken, SC

Re: Confirm Bearing Noise Problem

Postby zachmac » Tue Dec 05, 2017 5:53 pm

KevAndAndi wrote:That 1” of travel is supposed to be at the top, not the bottom. I don’t think you would ever get the clutch to grab with the pedal 1” off the floor.

This is correct. I should have posted about 1 inch of play before the clutch CABLE begins to DISENGAGE the clutch. The adjustment has you take slack out of the cable such that you encounter resistance (clutch springs on the pressure plate) after about 1 inch of travel from the top. I think I probably have about 2 inches of travel from the floor up before the clutch starts to engage with the travel between there and one inch short of top being the engagement pedal travel.
Jeff Klein, Aiken, SC
1980 FI Spider, Veridian with Tan (sold about a year ago), in the market for another project
2009 R350 Mercedes, family hauler
2005 S600 Mercedes V12, 620 hp, 740 ft lbs torque


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