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  #1  
Old 04-15-2019, 06:08 PM
smak smak is offline
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Default series of rattling knocks like marbles on startup, for xfer box?

so i cant place now if this is happening as a result of a recent jaunt down a particularly bumpy ice road or if its been happening before that but startup has been getting wrose with a rattling knock happening and a surging idle for the first second of running..

the knock seems like its coming from behind the motor tough, in the transfer box maybe?

i gave it a little rev in neutral today when at a light and the rattle got faster with revs which freaked me out so i went and got a new oil filter and swapped it in as precaution of oil pressure light malfunction and a bad filter.

'06 supercab with a four liter v6 currently
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Old 04-15-2019, 06:15 PM
e.fisher26 e.fisher26 is offline
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Default Re: series of rattling knocks like marbles on startup, for xfer box?

Just on startup could be timing chains, but from back of eng could be cracked flywheel or flapin heat shield underneath somewhere


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Old 04-15-2019, 06:23 PM
smak smak is offline
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Default Re: series of rattling knocks like marbles on startup, for xfer box?

after swapping the oil filers (i recently changed my oil and put a quart of auto-rx which maybe have clogged a filter with faulty bypass) it seemed to be a more subtle or at least not increasingly loud issue.. but the two hour rest could be a new variable as i usually either leave it over night before startup or no more than half hour for refeuling.

like i said, recently at idle i reved and the noise got louder and increased frequency with rpm.. but then when i parked the car before swapping filter it reved normal no problems.

oil level and colour/odour/texture is normal using 5w30

Last edited by smak; 04-15-2019 at 06:30 PM.
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Old 04-15-2019, 06:32 PM
e.fisher26 e.fisher26 is offline
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Default Re: series of rattling knocks like marbles on startup, for xfer box?

Stick with motorcraft filters (IMO). If it is an oil problem maybe the pump, but it痴 too new for that. Did it do it in drive and park?


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Old 04-15-2019, 11:20 PM
smak smak is offline
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Default Re: series of rattling knocks like marbles on startup, for xfer box?

Quote:
Originally Posted by e.fisher26 View Post
Stick with motorcraft filters (IMO). If it is an oil problem maybe the pump, but it痴 too new for that. Did it do it in drive and park?


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she's a standard trans.. i believe i was in neutral but will distinguish between clutch in and neutral in tomorrows test drives
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Old 04-17-2019, 06:50 AM
smak smak is offline
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Default Re: series of rattling knocks like marbles on startup, for xfer box?

hrmm okay sorry for delay in updating this issue..

my fuel mileage seems unaffected so i am ruling out the engine.

i checked underneath and i've got the tranny going into an xfer box into the driveshaft to the rear (which looks aluminum is that standard?) then the rear diff..

the transfer box has a smaller yolk going into like a front diff for the front wheels..


a bit of play in the driveshaft, i have not investigated with it running yet, later today i will.

when driving the cars revs surge with little momentum or vehicle speed gain at higher rpm.. over two thousand rpm in first, bit higher in second and so on.. i am able to pamper the car and notice no ill effects, the noise comes and goes in all speeds gears and conditions.
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Old 04-18-2019, 04:21 PM
e.fisher26 e.fisher26 is offline
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Default Re: series of rattling knocks like marbles on startup, for xfer box?

It痴 just a noise not a vibration? If this noise wasn稚 there would there be any other difference in driving?


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  #8  
Old 04-18-2019, 06:07 PM
Dirtman Dirtman is offline
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Default Re: series of rattling knocks like marbles on startup, for xfer box?

Probably goblins got into your crankcase. Happens all the time. Use grave dirt mixed with goat blood, sprinkle it on the engine and chant the lords prayer backwards 9 times.

Or, given your knowledge of automotive repair... Go to a mechanic.
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Last edited by Dirtman; 04-18-2019 at 06:11 PM.
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Old 04-18-2019, 06:53 PM
smak smak is offline
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Default Re: series of rattling knocks like marbles on startup, for xfer box?

I'm hesitant to goose the throttle, its not the clutch slipping at higher revs but the engine sound certainly increases.

Engine start up has the knock and surge, almost like its going to backfire or stall sound but with engine surge thats not a concern. After startup though the knock isnt evident until i start moving again.

I never seem to have the time or presence of mind to check where the knocks are originating when i get back home and park in the driveway.

Would it be easier to replace a broken flywheel or transfer box?

On the highway there isnt any excessive vibration or alteration of driving so long as i have been pampering it under 3k rpm as i have.

The whole body is generally more noisy, also an indicator its the transfer box i guess, just like turning becomes tighter in 4wd.

Clutch isna wear and tear item though i may just order one of those up just to be safe.
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  #10  
Old 04-20-2019, 06:35 AM
dvrich dvrich is offline
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Default Re: series of rattling knocks like marbles on startup, for xfer box?

Quote:
Originally Posted by Dirtman View Post
Probably goblins got into your crankcase. Happens all the time. Use grave dirt mixed with goat blood, sprinkle it on the engine and chant the lords prayer backwards 9 times.

Or, given your knowledge of automotive repair... Go to a mechanic.

Drilling out the lock cylinder should help. LOL
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