Longevity of 2.5n/a engine, and LT77 gearbox?

Hi all,
I bought an older 110 a couple of years ago with 2.5n/a engine, and
LT77 gearbox. The vehicle only has 80,000 kms on it and runs very
well. Looks like the injector pump has been replaced. I replaced the
timing belt recently. THe gearbox shifts well, not really bad noises
or clunks (the odd one). I've ordered an oil thrower for the LT77, and
have replaced all fluids in gearbox/xfer case.

There may not be a general answer to this (depends on usage type
etc.), but I am wondering what is an average lifespan (before internal
surgery is required) for the 2.5n/a and the LT77, so I can start
planning for future repairs, or apply more preventative maintenance
(adjustments, fluid changes, etc.). I read somewhere (LROI) that an
LT77 will likely require overhaul at 80,000 miles.

Thanks.
--Robert (Canada - which means that upgrading the 2.5 to Tdi is not
simple nor cheap)

"Robert St-Louis" <[email protected]> wrote in message
news:[email protected]...
> Hi all,
> I bought an older 110 a couple of years ago with 2.5n/a engine, and
> LT77 gearbox. The vehicle only has 80,000 kms on it and runs very
> well. Looks like the injector pump has been replaced. I replaced the
> timing belt recently. THe gearbox shifts well, not really bad noises
> or clunks (the odd one). I've ordered an oil thrower for the LT77, and
> have replaced all fluids in gearbox/xfer case.
>
> There may not be a general answer to this (depends on usage type
> etc.), but I am wondering what is an average lifespan (before internal
> surgery is required) for the 2.5n/a and the LT77, so I can start
> planning for future repairs, or apply more preventative maintenance
> (adjustments, fluid changes, etc.). I read somewhere (LROI) that an
> LT77 will likely require overhaul at 80,000 miles.
>

As long as you change the oils and filters and have some mechanical
sympathy, then 10,000 hours is easily achievable. How many miles this
equates to varies according to your type of use. If, like me, you drive off
road, heavy tow and have mainly short journeys, then this may be between
100,000 and 140,000 miles. If you drive following the Canadian Pacific
railroad then perhaps over 300,000 is possible.
My engine and gearbox are totally original apart from a head gasket at over
10,000 hours. The gearbox [lt77] has not been used with ATF for over 15
years though. It has been run filled with oil suitable for Ford MT75
gearboxes which is fluid roughly equivalent to the latest recommendation of
MT oils.
The transfer box has always run with light viscosity [10w/30] Super
Universal Tractor Oil.

It has had a steady diet of steering and suspension components, including
steering boxes and pumps, also clutch master and slave cylinders but only
two actual clutches [one in the second year of its twenty].

Good luck.

Huw