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  #1  
Old July 25th, 2016, 10:23 AM
rovertini
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bo
'67 sII-a,
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bearing type noise

'67 IIA 88 -newly/professionally rebuilt 2.25 (petrol) and clutch.

I went off road into some deep florida fresh water, mud. etc.in May
didn't put in the wading plug as I didn't expect that much water.

Shortly after, at full highway speed (62mph) I hear a disturbing metallic whirr, which sounds like a bearing or lubrication issue. Reducing speed to <54 mph, or pushing in the clutch stops the noise temporarily, but it comes back at higher speeds, or occassionally/briefly at c.55mph. It is never a constant noise, but troublesome sounding when it happens.

Anyone out there have any suggestions? I don't want to have to pull the tranny if
not absolutely neccessary. Thanks

Bo
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  #2  
Old July 25th, 2016, 10:26 AM
Naplm00
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Matthew
1983 110 200tdi 3 door soft top
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My guess is throw out bearing, but It sounds like you might already know that.

I'd flush all fluids including diffs too
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  #3  
Old July 26th, 2016, 11:07 AM
rovertini
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bo
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If it is the throwout bearing making the noise, what is next step to correction?
thanks
Bo
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  #4  
Old July 26th, 2016, 11:12 AM
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John B.
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If it is a throwout bearing, it needs to be replaced. It could be something else though. Wading should not kill the bearing. A bad throwout bearing should be the opposite. Loud with the clutch pedal down. Check the u-joint on the driveshaft. Beyond that, these things can be hard to track down and you may need to live with it until it gets to a point where the fault is obvious.
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  #5  
Old July 26th, 2016, 11:37 AM
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Jack Walter
1966 109 SW Diesel
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If it's a standard SIIA transmission with non- synchro first and second the throwout bearing is internal to the transmission.
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  #6  
Old July 26th, 2016, 11:58 AM
rovertini
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bo
'67 sII-a,
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Thanks to all.

More info on symptoms:

(Std. IIA non-synchro 1&2) new clutch assembly in 2015.
U-joints are new and fluids recently topped up.

Depressing the clutch at high speed stops the noise, but also slows the truck down (same thing happens when just letting off the accelerator without depressing clutch). It seems more RPM related, or perhaps temperature affecting the lubrication. the noise seems to come from the forward end of the tunnel, not the rear.
I have never heard the noise at high RPM in any gear but 4th. It only happens at constant high (for a rover) speeds, and not everytime at 55+. But it has become more frequent.

Truck is in FL. for summer, I am in VA., so I can't do any more hands on info 'til Nov. But i do have to drive it 70 miles north when I get there. Maybe I'll go back roads?
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  #7  
Old July 26th, 2016, 01:20 PM
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Chris
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You topped up fluids, post event but did you drain them?
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  #8  
Old July 27th, 2016, 04:27 PM
rovertini
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bo
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negatory
fluids were filled prior to bath
so what we have is perhaps fluids with water, dirt contamination?
no discernable noise from front/rear diff
what forward component might wick in the sludge(if that is the problem)?
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  #9  
Old July 27th, 2016, 04:55 PM
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Rocky
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Chris
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Drain them all and refill!
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  #10  
Old July 27th, 2016, 05:07 PM
Naplm00
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Matthew
1983 110 200tdi 3 door soft top
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after hearing more, im skeptical that this is a throwout bearing... unless its dragging on the spring face of the pressure plate due to some chaff or shit stuck up in there ....


maybe a trip to harbor freight and amazon for a auto stethoscope and a flexicam would help, stick thoes in the wading plug hole and have a assistant pump the clutch
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  #11  
Old July 28th, 2016, 01:47 AM
Greg S
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Greg Sutfin
1986 90
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Normally there's no need for a plug in the drain hole in the flywheel housing. It's there to let any leakage out. It is considered to be a bad thing to have a bunch of oil getting tossed around the clutch works. Oil will only leak from the rear engine seal because there is no seal to leak on the front of the gearbox. Instead the gearbox input shaft has a spiral groove cut into it that pushes any gear oil back into the gearbox. Trouble is, if you let a bunch of water in there by not having your wading plug installed when your in deep water, the spiral groove will pump water into the gearbox.
No wading plug = water pumped into gearbox.
That's why it's more important to drain the gearbox after wading than it is to fill it before hand.
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  #12  
Old July 28th, 2016, 08:19 PM
rovertini
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bo
'67 sII-a,
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So, does anyone know of anyone in West Palm Beach that will know how to drain/refill the fluids properly? Anyone know of a rover guy in that area?
The green bible is great for how to....., but it is in Vero, and I can't crawl under, etc. Dealership will be useless, as there isn't an onboard computer to run everything.
By the way, big thanks to all responders. Good grouping.
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  #13  
Old July 28th, 2016, 08:33 PM
Naplm00
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Matthew
1983 110 200tdi 3 door soft top
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Do what I do for filthy jobs like scraping undercoating and doing fliud changes.

Put tools in truck
Drive to nearby Walmart
Change fluids in parking lot not caring if I get some shit on the ground
Recycle oil at said Walmart
Clean up in already disgusting Walmart washroom
Leave!
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