Speed of the output shaft will INCREASE (or speed of input shaft will
decrease) when OD is engaged.
Tim Holbrook
1971 TR6
--- Peter Zaborski <peterz@merak.com> wrote:
>
> > From: Ryan Miles [mailto:rjhmile@yahoo.com]
> > Sent: June 13, 2000 11:25 AM
> >
> > My question is this, what should I do to the transmition
> > before I install it in my car.
>
> Although it is a pain to separate the OD from the gearbox, it is also
> a
> might big pain to remove the gearbox from the car. Thus it makes
> sense IMO
> to test the OD prior to installing the gearbox (assuming you are
> confident
> the gearbox itself works fine).
>
> One way to bench test the OD is with a 1/2" drill connected to the
> input
> shaft to turn the gearbox. Once up to a sufficient speed, power the
> OD
> solenoid and see if the speed of the output shaft decreases.
>
> A more sophisticated method is described below. Note: this is
> courtesy of
> Brian Schlorff who runs a shop called Power British -- very
> knowledgeable
> Triumph person.
>
> < start of Brian's instructions >
>
> Peter, after a rebuild, we run transmissions and overdrives on a
> break-in
> cycle before we reinstall them. I think this gives the units a
> longer life,
> and it allows us to check for any leaking seals and correct them
> before the
> customer gets his car back.
>
> The device is rather simple. It is an engine stand that I use toward
> the
> end of the trans. reassembly. The bell housing mounts to the stand
> in the
> normal manner using the arms on the head of the stand. Below the
> upright,
> we have another horizontal beam mounted so it is free to pivot up and
> down.
> On the loose end is a bracket that holds a 1/2hp electric motor such
> that it
> has some telescopic ability to account for different transmissions.
> We then
> add a pulley to the transmission's rear flange and loop a belt
> between the
> motor and the transmission pulley. A counterweight acts to tension
> the
> belt. Be sure to set up your motor to run the 'box in the proper
> direction.
> On a fresh transmission we run it for 8 hours in each gear for a
> total of 40
> hours run time, starting with neutral and then going to 4th, 3rd,
> 2nd, and
> 1st is done last since 1st puts the hardest load on the input
> bearing.
> After that, we drain the oil and refill and it is ready for
> installation.
> The overdrive can easily be checked throughout the breaking by
> connecting a
> battery and jumper wires on the
> solenoid and top cover switches.
>
> My opinion is that running it like this with no drivetrain load
> allows the
> bearings to bed in better and everything just seems to last longer
> than just
> shocking it into service right away.
>
> Regards,
>
> Brian Schlorff '61 TR-4 '64 TR-4 '72 TR-6 '79 Spit
> ---------------------------------------------------------------------
> Power British Check out Power
> British
> 371 E. Main St. on the 'net!
> Norristown, PA 19401
> (610) 270-0505 http://www.powerbritish.com/~britcars
> ---------------------------------------------------------------------
>
> < end of Brian's instructions >
>
>
> Peter Zaborski -- CF58310 UO
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