I never have changed the transmission oil (manual shift transmissions)
in any of my vehicles before.Mostly because I used to buy a used car or
truck or van and drive it for a two or three years and when I got tired
of it, I would trade it in on some other old used car or truck or van I
wonder how many people change the differential oil/fluid in their
vehicles? I never have done that either, well, except for one vehicle
many years ago.1978 Dodge van is what I drive, it has a automatic
transmission. (I plan on hanging on to that van as long as I am able to
drive) Is 90 W oil/fluid what I should buy for the differential?
cuhulin

<http://smg.toyotapartsandservice.com/>

Input 1997 Corolla, 30,000 miles. You get:

Replace engine oil and oil filter
Replace engine air filter
Replace engine coolant
Replace non-platinum spark plugs 1
Rotate tires
Inspect the following:
 Ball joints and dust covers
 Brake linings/drums and brake pads/discs
 Drive shaft boots (re-torque flange bolts)
 Exhaust pipes and mountings
 Fuel lines and connections, fuel tank band and fuel tank vapor vent
system hoses
 Fuel tank cap gasket
 Rack and pinion assy. for leakage
 Steering linkages
 Transmission and differential oil

They don't go back any further than 1997, so no Tercels :(

I did the same thing at the Honda Owners Site (it requires a log in).
For a 1997 Honda Civic, here is the 30,000 mile service:

30,000 miles/2 yrs Scheduled Maintenance
Recommended service for your 1997 Honda Civic:

Check valve clearance when the engine is cold. Do not check/adjust
them again unless they become noisy.
Replace engine oil.
Rotate tires. Follow the pattern shown in the Owner's Manual. Check
tire inflation and condition.
Replace engine oil filter.
Inspect front and rear brakes.
Check pads and discs for wear (thickness) and damage.
Check calipers for leaks and check tightness of mount bolts.
Check brake lining (or shoes) for cracking, glazing, wear and
contamination.
Check wheel cylinders for leaks.
Inspect tie-rod ends, steering gearbox and rack boots.
Check steering linkage for looseness.
Check fluid lines for damage and leaks.
Inspect suspension components.
Check bolts for tightness.
Check condition of ball joint boots for deterioration and damage.
Inspect driveshaft for cracks and check boot bands for tightness.
Check parking brake adjustment. Should be fully applied within 6 to 9
clicks.
Inspect brake hoses and lines (including ABS). Check the master
cylinder, proportioning controlvalve and ABS modulator for damage and
leakage.
Check all fluid levels, condition of fluids and check for leaks. If
needed, add transmission fluid, engine coolant, brake fluid, power
steering fluid, and windshield washer fluid.
Inspect cooling system hoses and connections.
Check for damage, leaks and deterioration.
Check for proper fan operation.
Inspect exhaust system. Check catalytic converter heat shield, exhaust
pipe, and muffler for damage, leaks, and tightness.
Inspect fuel lines and connections. Check for leaks.
Replace air cleaner element.
Inspect and adjust drive belts.
Replace spark plugs. (all models except SI model).
Replace CVT fluid (HX model with CVT); use Genuine Honda CVT fluid.

I got the same result for a 1998 Accord.

I have farm tractors that are running on 15 year old transmssion/rear
end/hydraulic system fluid. There is no way an automotive transmission
is stressing the fluid even close to what a farm tractor does.

Ed