[DML] Re: Differential Adjustment Nut
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[DML] Re: Differential Adjustment Nut



That adjustment is critical and sensitive. Not only must you count the
# of turns you must put it back EXACTLY as it was. The only way to do
that is to mark the case and the nut. Being off a part of a turn is
BAD. This is why it is not recomended to remove the nut to change the
seal. The only way to properly reinstall that nut now is to remove the
transmission and go through the whole adjustment procedure. If you do
not and try to just put it back together you will damage the pinion
and ring rear in the final drive. The factory may have used a
short-cut but you have to remember, the parts were brand new and by
now have worn together. If you do not fit them back properly you will
either wind up with too tight a fit or too loose a fit. Either way you
will destroy the final drive. A big tip-off will be if it gets noisy.
Another way to tell would be to drain the gear oil after driving a
while and see if there is a lot of metal in it. A loose fit will also
cause the output seals to leak. A tight fit will damage the gears and
bearings. The procedure doesn't require any special tools, just a lot
of time. (The factory may have used a fixture to hold the case
together so they didn't have to mess with all the bolts).
David Teitelbaum
vin 10757



--- In dmcnews@xxxxxxxxxxxxxxx, "Matthew" <matthew.spittle@...> wrote:
>
> Has anyone actually ever removed the differential adjustment nut?  I
> can't find anyone who has, and has actually counted the turns.  I
> talked to Derek Bell of Bell Performance (http://www.un1.co.uk/), and
> not even he has ever counted the turns.  Also talked to Dave Swingle,
> and he has never removed the nut.    
> 
> I had removed mine to powder coat my transmission (see here,
> http://www.dcpowdercoating.com/files/DSCF0046-1.jpg), but never wrote
> down how many turns it was.  I believe it was around 8.  Now I'm
> re-assembling it, and I would like to get it as close as I can to
optimal.
> 
> Having another 5-speed box sitting here, I marked it, and carefully
> removed the adjustment nut, counting the turns.  I got 8 and 1/4. 
> Could it be possible that these were assembled somewhat consistently
> in this regard?  If I had more data on this, perhaps it would become
> obvious that every one, for example, was turned 8 and 1/4 turns.  
> 
> I doubt that the factory assembled them using the same procedure in
> the workshop manual, because of how lengthy it is (assemble case
> halves and torque all 30-some bolts with only the differential
> installed, wrap string around the differential, measure the force it
> takes to spin it, then disassemble the halves, install all of the
> internals, apply sealer, install and torque all 30-some bolts again).
> 
> Not too many folks seem to have much information about it, outside of
> "Don't remove it."  
> 
> So, anyone?  I'm not tearing it down to use the workshop procedure.  I
> will set it to 8 and 1/4 turns if I can find no other information.
> 
> Thanks,
> 
> Matt
> #1604
>



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