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Old 12 Dec 2009, 12:24 PM   #1 (permalink)
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Question Drive train issue



Hi All,

Needed advice and possible solution to my problem...I have an ordinary 2001 WRX not STi and am having trouble with the drive train....

once i drive for close to an hour (boosting or not) there is quite a loud and obvious sound that seems to be coming from two opposite ends when the steering is turned almost full. i.e. if i turn fully to the left (even in 1st gear and not accelerating) the noises come from front right (hub or shaft) and rear left...at the same time there is much resistance towards motion...basically it is as if im driving on lock diff.... funny thing is that this does not happen at all until the drive train has become nice and warm...another observation is that this resistance to motion happens in both directions (forward and reverse) and also does the same if not in gear (i.e. in neutral) and rolling slowly on full or almost full turn!

I have not yet drained the oils and i only see two places to fill oil, i.e. the gearbox and the rear diff...one more thing, if i took out the prop shaft should not some oil pour out from the front end once i pull out the shaft?...there was none and there doesnt seem to be a refill port on the transfer box....please help me.

any ideas and/or suggestions are very welcome.
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Old 12 Dec 2009, 03:46 PM   #2 (permalink)
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Re: Drive train issue

had the same on my99 sti and that turned out to be a shot centre diff
fingers crossed its not,was not cheap to get done
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Old 12 Dec 2009, 04:04 PM   #3 (permalink)
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Re: Drive train issue

poss low power steering fluid?
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Old 13 Dec 2009, 12:16 AM   #4 (permalink)
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Re: Drive train issue

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Originally Posted by jujjubeans View Post

Hi All,

Needed advice and possible solution to my problem...I have an ordinary 2001 WRX not STi and am having trouble with the drive train....

once i drive for close to an hour (boosting or not) there is quite a loud and obvious sound that seems to be coming from two opposite ends when the steering is turned almost full. i.e. if i turn fully to the left (even in 1st gear and not accelerating) the noises come from front right (hub or shaft) and rear left...at the same time there is much resistance towards motion...basically it is as if im driving on lock diff.... funny thing is that this does not happen at all until the drive train has become nice and warm...another observation is that this resistance to motion happens in both directions (forward and reverse) and also does the same if not in gear (i.e. in neutral) and rolling slowly on full or almost full turn!

I have not yet drained the oils and i only see two places to fill oil, i.e. the gearbox and the rear diff...one more thing, if i took out the prop shaft should not some oil pour out from the front end once i pull out the shaft?...there was none and there doesnt seem to be a refill port on the transfer box....please help me.

any ideas and/or suggestions are very welcome.
Gotta determine weather it drivetrain or steering problem first so Id take the car to a big car park put car in neutral, engine idling turn steering wheel to lock full both either side see if noise is their, if it is its got to do with the steering. how to fix this noise: its either air in system due to low on fluid or worn steering rack seals, or one of the hose clips loose and letting air in, or hole in hoses most common causes simple fix. Find the problem correct it fill fluid to max, turn steering wheel near the stops not hitting stops on wheel turn full lock either side while keeping reservoir topped up to max this will bleed air out and continue this till noise goes away.

Drivetrain noise: in the car park drive slowly locking full left on steering if you hear a clicking sound or a knock on the front right thats an outer right cv joint worn, then lock full right if you hear a clicking sound or knock on the front left thats an outer left cv joint worn, if you hear very bad knocking when you doing this to could be down to diffs also and if wheels lock up its the diff worn. Locking full either left or right in steering and normally happens when just going on the power on- off suddenly you might hear a knock in the centre underneath of car it proberbly bit of play on propshaft bearings thats normal to an extent I get that in mine but once it not a very bad or loud knock should go to a specialist hard to determine would have to see it
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Old 13 Dec 2009, 01:54 AM   #5 (permalink)
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Re: Drive train issue

Quote:
another observation is that this resistance to motion happens in both directions (forward and reverse) and also does the same if not in gear (i.e. in neutral) and rolling slowly on full or almost full turn!
As Holyfield says, check your power steering fluid as the above pretty much rules out diff issues since you are having the problem in neutral. If not fluid then do as Darren suggests.
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Old 16 Dec 2009, 07:11 PM   #6 (permalink)
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Re: Drive train issue

Thanks guys for the pointers...I need to say that i am a mechanic and i know for certain that it is not the CV joints and there is not a sound from the steering pump nor any sort of leakage...no ATF no engine oil or even diff / g box oil leak.... I already changed the 2 cross bearings and it may have reduced part of the noise...

One of you had a problem with a centre diff...well, this car is M/T and has a gearbox, behind which is what i would call a transfer box...the only other diff i see is at the rear....BUT...in the middle of the prop shaft there is some sort of flexible joint / coupling and this is what i dont understand....when i squeeze the two sides of the prop shaft together there seems to be squishy sound (like some kind of vacuum filled with grease).....sorry to sound so daft but i have never seen any such system before and i dont work on scoobies too much...just the odd lube service or clutch job...

It is actually a buddies car and a week before all this started, we were out drinking then had a flat (front RHS wheel), which we changed with the spare wheel that we call a donut here in kenya....It is generally what comes with any used japanese import and is of smaller size....Now the Japs put it there as a spare wheel on an AWD vehicle so my dumb ass buddy insisted on pushing the car that night (with a smaller sized wheel on, i think it is a 14" rim (115 x 60/65 R 14))...like i said, i dont know much about scooby diffs and boxes etc...do you think that could have done the trick!!!

to describe the noise in some more detail...it happens once the whole drive train has gotten nice and working temp like and happens on 1 1/4 turn cut + (not even full cut)...that would generally be felt when leaving a junction or parking the car!...the 'kack' - 'kack' sound alternates between front RHS and rear LHS wheels/shafts whatever and vice versa if i turn the other way....hope this makes sense... well...Happy holidays and I hope you guys respond soon....by the way, my buddy is back home in Ireland (he didnt leave me the car...)...
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Old 17 Dec 2009, 03:17 AM   #7 (permalink)
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Re: Drive train issue

Quote:
Originally Posted by jujjubeans View Post
Thanks guys for the pointers...I need to say that i am a mechanic and i know for certain that it is not the CV joints and there is not a sound from the steering pump nor any sort of leakage...no ATF no engine oil or even diff / g box oil leak.... I already changed the 2 cross bearings and it may have reduced part of the noise...

One of you had a problem with a centre diff...well, this car is M/T and has a gearbox, behind which is what i would call a transfer box...the only other diff i see is at the rear....BUT...in the middle of the prop shaft there is some sort of flexible joint / coupling and this is what i dont understand....when i squeeze the two sides of the prop shaft together there seems to be squishy sound (like some kind of vacuum filled with grease).....sorry to sound so daft but i have never seen any such system before and i dont work on scoobies too much...just the odd lube service or clutch job...

It is actually a buddies car and a week before all this started, we were out drinking then had a flat (front RHS wheel), which we changed with the spare wheel that we call a donut here in kenya....It is generally what comes with any used japanese import and is of smaller size....Now the Japs put it there as a spare wheel on an AWD vehicle so my dumb ass buddy insisted on pushing the car that night (with a smaller sized wheel on, i think it is a 14" rim (115 x 60/65 R 14))...like i said, i dont know much about scooby diffs and boxes etc...do you think that could have done the trick!!!

to describe the noise in some more detail...it happens once the whole drive train has gotten nice and working temp like and happens on 1 1/4 turn cut + (not even full cut)...that would generally be felt when leaving a junction or parking the car!...the 'kack' - 'kack' sound alternates between front RHS and rear LHS wheels/shafts whatever and vice versa if i turn the other way....hope this makes sense... well...Happy holidays and I hope you guys respond soon....by the way, my buddy is back home in Ireland (he didnt leave me the car...)...
Better tell him get it checked by a specialist so bud as could be anything broken in box or diff what part of Ireland is he from?
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Old 17 Dec 2009, 06:46 PM   #8 (permalink)
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Re: Drive train issue

we are all specialist in nairobi....lol...diff is a diff...if i take it apart...its going to show somewhere...either which way it would probably be best get a new one....i have no idea where in Ireland he is from....but His dad's a retired horse trainer and moved back to Ireland recently...

hey, would that smaller tyre thing have done some damage to the diff situation?...Im actually a diesel (injector pump) technician and so i build engines so when it comes to differentials etc, i dont know much....
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Old 17 Dec 2009, 07:13 PM   #9 (permalink)
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Re: Drive train issue

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Originally Posted by jujjubeans View Post
we are all specialist in nairobi....lol...diff is a diff...if i take it apart...its going to show somewhere...either which way it would probably be best get a new one....i have no idea where in Ireland he is from....but His dad's a retired horse trainer and moved back to Ireland recently...

hey, would that smaller tyre thing have done some damage to the diff situation?...Im actually a diesel (injector pump) technician and so i build engines so when it comes to differentials etc, i dont know much....
Nairobi thought car was in Ireland if it was local I would have looked at it mechanic myself not in less you pay for my ticket to fly over can you put up the video on youtube or similar might give us more insight into the noise?
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Old 18 Dec 2009, 05:32 PM   #10 (permalink)
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Re: Drive train issue

just got internet in kenya last week...broadband is still a few lightyears away...haha...youtube video coming up...early january....thanks though...
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