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Rear wheels lock up when slowing down @5km 

 

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 Post subject: Rear wheels lock up when slowing down @5km
Posted: Wed Mar 05, 2008 10:51 am 
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this problem just started a few days ago... when driving and slowing (no brakes) down the rear end locks up and the cars a** bounces and the engine almost stalls then its ok? is it a diff problem?

 

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Posted: Wed Mar 05, 2008 11:10 am 
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er... diff wouldnt cause the engine to nearly stall...

.. but transmission lockup might?
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Posted: Wed Mar 05, 2008 11:37 am 
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Nigel wrote:
er... diff wouldnt cause the engine to nearly stall...

.. but transmission lockup might?



trans lockup? the trans seems fine....it just got done a few month ago.... also what will caouse trans lockup?

 

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Posted: Wed Mar 05, 2008 11:45 am 
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I was thinking 1st gear applied at same time as second....

But that was all I had for ideas.
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Posted: Wed Mar 05, 2008 11:57 am 
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i gave a service to tranny and diff last night which did help it a bit...its got little (lots)metal particles in it(clutches) i have also niticed it going from 2nd to 1st back to 1st that cousl be the problem....maybe a solenoid....

 

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Posted: Wed Mar 05, 2008 12:05 pm 
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Could be uni's.
It could be catching on some thing in the box when it goes to change into first gear.
Do the wheels lock up if the car is in netural slowing down?



edited due to finding out 1 of my questions

Last edited by RedRoo on Wed Mar 05, 2008 12:17 pm, edited 1 time in total.

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Posted: Wed Mar 05, 2008 12:10 pm 
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keep in mind this is an 11 second EL still running a BTR :P
metal shavings from the trans doesn't sound promising :P

 

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Posted: Wed Mar 05, 2008 12:15 pm 
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Sounds a lot like one of the solenoids is slow, and not letting go fast enough on the 2->1 change.

Metal filings... is a good reason to be slow.
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Posted: Wed Mar 05, 2008 12:17 pm 
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RedRoo wrote:
Auto or Manual?
Could be uni's.
If auto it could be catching on some thing in the box when it goes to change into first gear.
If manual it could be the diff's crown wheel bolts come loose or the spider gears retainers?
Do the wheels lock up if the car is in netural slowing down?



never tried to put in neutural...., i was thinking the diff....

the metal particles could of been der since the cluches was changed....i dont think the auto got flushed......but the auto if shifting perfectly fine.....its doing its job...so donno what...

 

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Posted: Wed Mar 05, 2008 1:15 pm 
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Too early to tell, any weird noises etc?
Have you checked your rear rotors for warping and your pinion/uni spinning freely?
Have you jacked it up, supported and chocked it properly to check it visually at idle, in gear?
Doing these things could give a few more clues and may even reveal the problem straight away.
Cheers,
Paul

 

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Posted: Wed Mar 05, 2008 1:21 pm 
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it did used to make a clunck noise and it dose make a noise like somethings lose in the diff when it changes gear....also the fluid finished in bout 1 week....but no leaks and the diff heats up more than normal....

 

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Posted: Wed Mar 05, 2008 7:43 pm 
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Short of going to a trans/diff shop and having it checked, the easy option, try doing what I suggested above first. If your still not sure what it is, swapping in a spare diff. assembly would eliminate one possible cause, if no change that leaves the gearbox and tailshaft as prime suspects.
If it's all good, then it's a component of your removed diff assembly ie either brakes, axles, bearings or diff. centre. Easier to fix as it's already out of the car.
Cheers,
Paul

 

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Posted: Wed Mar 05, 2008 8:53 pm 
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Allmost sounds like his ECU / BOX is keeping the Torque Converter locked up for to long.
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Posted: Wed Mar 05, 2008 11:42 pm 
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garsiph,
I reckon that's possible but the comments re. the diff noises [above] lead me to suggest separating them. For me, it's easier to swap out a complete diff. than a gearbox for a test run.
One affecting/damaging the other is also a possibility, better checked if separated is all I'm suggesting to HiBoost.
Cheers,
Paul

 

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Posted: Wed Mar 05, 2008 11:46 pm 
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Paul,

My diff goes KLUNK when i drop the gas or slam the gas on.
The Uni on the tailshaft needs to be replaced.
it wouldnt cause his issues.

But we also need to know if its lsd
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