UPDATE! TOB Question

[FrOsTyShO]

Can the TOB vibrate and make noise when the clutch pedal is engaged fully and the car is in gear?

<small>[ September 29, 2003, 03:04 PM: Message edited by: FrOsTyShO ]</small>

 

[NinjaMike]

If by "pedal fully depressed" you mean pushed all the way to the floor, then yes it can.

 

[Bizzy]

Yes, but you could also be hearing gear rattle or a bad bearing in its beginning stages.

Things you should check:

*Fluid level
*Connection between the engine and tranny
*Check to see if there is any contact between the engine/tranny to the chassis.

I would be less concerned if you were only hearing the noise while in neutral with your foot off the pedal. The car being in gear bothers me.

 

[FrOsTyShO]

I mean when the clutch is engaged or let out fully and the car is in gear and i'm accelerating.

 

[NinjaMike]

It's most likely gear "rollover". It's a normal sound...

You hear a new sound every week don't you?

 

[Bizzy]

NinjaMike:
It's most likely gear "rollover". It's a normal sound...

Beg to differ on this one. There are several different scenarios here. If what he is hearing is one of these three, no damage to the tranny or engine will occur (with the exception of lugging over time, as lugging causes a low/no oiling condition in the engine.)

Neutral rollover noise will be heard while the car is at idle, in neutral with clutch pedal up but once you push down on the clutch pedal or select a gear and start moving, the noise will go away as tension is placed on the gear shafts.

Gear rollover noise (& some TOB rattle) is caused by the vibrations of the engine but the noise goes away when the tranny is put in gear.

Gear rattle is more like the lugging sound you get when you select say 3rd when you should have selected 2nd.

When a TOB is damaged or worn, because it constantly moves because of the self adjusting clutch mechanism, you will hear noise whether the clutch is engaged or disengaged. To manually test the TOB without removing the tranny, remove the clutch release cable and slide the TOB away from the pressure plate by moving the clutch release arm. If the noise goes away then the TOB is worn or damaged.

If the TOB test goes ok (per say) and the noise does not go away I would be more inclined to look at the bearings in the tranny.

 

[NinjaMike]

Beth,

Way back in the day, there used to be a lot of concern about noise in first gear acceleration. It was gear rattle and it was said to be normal. Some of the cars I've owned have had it and some haven't, but drivability between the cars remained the same.

A lot of the early cars stopped exhibiting symptoms once people switched from the 9.25" clutch assembly to the 9.75" clutch assembly as the larger flywheel would absorb more engine vibrations. Nevertheless, a good portion of the cars still did it.

Nonetheless, It's next to impossible for us to hear exactly what kind of noise he is hearing when he's accelerating so for all we know, we could both be completely off target here.

<small>[ September 22, 2003, 12:16 PM: Message edited by: NinjaMike ]</small>

 

[FrOsTyShO]

The noise is not present when the car is in neutral and it doesnt happen every time i stop and then go. I dont think it is gear rollover because it only happens after the clutch has been let out all the way. When i do the manual tob test should the car be running? Also, could bad halfshafts or cv joints make a vibrating/grinding sound?

 

[Bizzy]

FrOsTyShO:
The noise is not present when the car is in neutral and it doesnt happen every time i stop and then go. I dont think it is gear rollover because it only happens after the clutch has been let out all the way. When i do the manual tob test should the car be running? Also, could bad halfshafts or cv joints make a vibrating/grinding sound?

The car has to be running. Make sure the car is in neutral and block the wheels when you do it. Also, prop your clutch pedal up with a piece of wood before you undo the cable. Not a must...but is good practice. Some people do that, others don't.

I don't think that halfshafts/CV joints would make a grinding noise unless they were really, really, really...really bad. I do not know this for fact though since I've never experienced that. Most of the time you'll know CV joings are going bad, when you go around a turn and you hear a clicking sound.

Wheel bearings make a nice grinding noise though......as do bad brake pads.

<small>[ September 22, 2003, 08:43 PM: Message edited by: Bizzy ]</small>

 

[masho95]

Bizzy:
When a TOB is damaged or worn, because it constantly moves because of the self adjusting clutch mechanism, you will hear noise whether the clutch is engaged or disengaged.

I'd have to semi-disagree with you on this one. The TOB can cause a rattle with the clutch out but not with the clutch pushed in. Bent PP fingers can cause the TOB to rattle as it rides on an uneven PP surface.

 

[DHMag]

FrOsTyShO:
The noise is not present when the car is in neutral and it doesnt happen every time i stop and then go. I dont think it is gear rollover because it only happens after the clutch has been let out all the way. When i do the manual tob test should the car be running? Also, could bad halfshafts or cv joints make a vibrating/grinding sound?

speaking of CV joints/half shafts, here is something i found helpful/useful in the JC Whitney catalog:

Symptom: Clicking sound on sharp turns---Cause: Worn outer joint

Symptom: Clunking noise on deceleration or acceleration---Cause: Worn inner joint

Symptom: Vibration/shudder during acceleration---Cause: Inner joint problem or bent shaft

 

[FrOsTyShO]

Thanks for the help guys. I'll try the check of the tob first and if nothing happens, then i guess ill have to replace the halfshafts. I'm pretty sure its not the wheel bearings as the tires have no play in them at all when i checked a few days ago.

 

[FrOsTyShO]

I did the manual test for the TOB and the car made the noise was there when i moved the clutch lever. The noise sounded the same it was only a little higher pitched. Now, can anyone give me some advice as to what clutch to get and what kind of tob and anything else i can go while im in there. I was looking at a shonut hd pressure plate, fibertuff disc, the original ceramic tob, teflon bushings, leak fixing parts kit, and the subframe recall kits and also some aluminum sfb.