Brian Smith wrote:
> "jim beam" <spamvortex@[EMAIL PROTECTED]
> wrote in message
> news:RJOdnX0uKYdcf3TYnZ2dnUVZ_qSrnZ2d@[EMAIL PROTECTED]
>> i'm interested to know - have you established from testing that the
lower
>> failure rate is a function of this maint. schedule, or has allison
changed
>> anything in their transmissions? and what was the failure mode? metal
>> fatigue for instance is not known to be influenced by oil filter
>> cleanliness. clutch life isn't rally affected by it either. operation
>> tends to get less smooth as particulates ac***ulate, but that's not
>> necessarily going to affect overall life of the transmission.
>
> In the past the transmission fluid and filtres hadn't been changed
> except when the transmissions displayed problems (not ****fting
correctly,
> jumping in and out of gear). Once I implemented the yearly changes,
there
> have been no further issues with any of the transmissions. The down time
> that was experienced in the past was a killer on the schedules. They are
> specialized trucks and one can't rent replacements from Ryder, so they
have
> to be working properly every day, all day long.
>
ok, if filter clogging is an issue, then it's good to change them.
this should have been revealed in failure analysis though, not be the
result of what is, with respect, a pretty much random maintenance
schedule. in an ideal world, you'd have had the manufacturer work with
you to figure this stuff out, not just gouge you for new transmissions.
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