Please excuse my ignorance but, I thought that the tranny used normal
engine oil, not gear lube. 75w-90 is gear lube in my book. won't this
damage the tranny? I've been told gear lube can't enter all the bearing
surfaces properly. Just asking please don't flame me.
52 MGTD, 74 B, 76 XJ12C (wife's), & Puddles (60 Frogeye)
Brian Evans wrote:
> Sounds perfect to me. Use 15W-50 in the engine, and if it's a new rebuild,
> use normal, non-synthetic oil for the first 500 miles. Helps the
> cam/lifters break in properly. In actual fact, you only really need to run
> on normal oil for the first 20 minutes, but it seems a shame to throw out
> perfectly good oil!
> At 09:28 AM 3/19/98 -0500, you wrote:
> >The discussion of crankcase/gearbox/differential lubes is really timely
> >for me. I didn't realize that there were so many choices and viewpoints.
> >I need to replace all of these because they have been sitting for at least
> >ten years. I plan to use Mobil1 synthetics just because they are
> >considered to be of decent quality and they are readily available. This
> >car will be a daily driver that will rarely see temps below 50 deg F or
> >above 100 deg F. (Iowa, spring summer fall service only) I will probably
> >use it for around-town driving only. Not a racer.
> >The manual I have don't specifically mention synthetics (of course) Do you
> >just use the same weights? I could use some advice:
> >For the engine: 0W-30? 5W-30? 10W-30? or 15W-50?
> >For the gearbox: Mobil1 75W-90 Synthetic gear lube ok?
> >For the differential: Same as gearbox? (Data sheet says "Completely shear
> >stable, even under severe shearing in hypoid and other automotive gears")
> >Jim Henderson
> >'69 Sprite MKIV HAN9U78817G