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manual transmission --- 80w-90 for the gearbox and transfer case
diff is 80-90 oep if a straight diff and different if a limited slip diff gear box is around the 2.5 ltrs as is the diff each
LiSiD oil can be used in LiSiD diffs and straight diffs but straight oil cannot be used in lisid diffs
the transfer case uses the same as the box but the quantity you will have to check in the lubrication section of the user manual
many user manuals recommend a lighter straight oil for transfer cases and boxes ( 30 straight oil) but I find that the light oil promotes bearing wear and gear problems as the oil squeezes out under load
Hi Mathew, The 89 Corolla usually has front wheel drive and a combined gearbox and differential. If the box is a manual it uses a 65 w 70 HP oil. If it is automatic it uses ATF in the gearbox which is usually also combined, but some have separate diffs and use the 65 w 70 in the diff section. Regards John
some trans dont have dip-stick tubes any more they are checked and topped off from under car when serviced also atf oil is very thin and has alot of detergents as compared to 90wt gear oil, i would drain and refill front diff. yes.
If the front differential is covered with oil, chances are that the leak is from the pinion seal on the diff itself or from an engine leak. check all the fluids and find what is low and clean off all the residue there so you can find the source. Since the t case is behind the diff, and the air flow is towards the rear (unless you drive backwards all day long) any leaks would tend to blow towards the back, not towards the front.Once you find the actual leak source, someone here can help advise you on how the repair can be made.
remove entire trans,remove 8 bolts and then remove front differential case at this time you will need to remove torque convertor with tube do not remove this tube from the convertor it drive the oil pump, the gasket is liquid gasket make sure surface is clean,also at this time replace torque convertor seal and seal tube this tube seperates transmission fluid from gear oil good luck
They dont have a dip stick but do have a bolt that is removed Diff/transfer case and gearbox the bolt you take out is at the height/level that the fluid should be at and its where you fill the diff/gearbox.Its in the side of the gearbox about half way up.
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