Pour 10w 30 into a cup
pour 75w 90 into a cup
I think you will get the picture after this very simple test.
If you think motor oil is thicker then gear oil, maybe you should take the car to a shop for service so you do not damage anything.

Just my 2 cents

By Maestro (Maestro) (62.135.90.230) on Friday, June 03, 2005 - 02:22 pm:

well i i think Motor oil is Thicker Than Gear oil May be automatic fluid I will try it

By Hugh Johnson (Oneson1) (144.138.198.55) on Friday, June 03, 2005 - 02:00 am:

Why bother asking? people told you what they do and what honda recomends and you take no notice. And your not good to go I think, see how slow your synchros are, especially in cold weather with diff oil in there.

hugh

By shnitzel (24.66.80.87) on Thursday, June 02, 2005 - 04:22 pm:

i didnt know what to do, stuck in 80 - 90 gear oil! ha ha ha ha ha! worked great! its just a bunch of gears, as long as their lubricated your good to go i think.

however, i will be putting in a lighter synthetic after my motor rebuild is done. just waiting for my crank and rods, got everything else ready! from 80-90 to 10-30 synthetic should help my acceleration some i'd think.....

By DaRk (66.50.182.134) on Thursday, June 02, 2005 - 11:30 am:

My uncle told me that there is some special "grease" that is made especially for the tranny... But I see you guys say no gear oil? waht to use then , regular engine oil?

By Hugh Johnson (Oneson1) (144.138.198.121) on Thursday, June 02, 2005 - 02:41 am:

Glen is perfectly correct, use atf with no worries at all. I've used it in competition honda boxes including straight cut specials for years, I use it in my road cars as well. brilliant stuff.

hugh

By Glenn Biscan (211.30.144.154) on Thursday, June 02, 2005 - 12:21 am:

i use automatic transmission fluid no worries

sometimes mixed with a bit of engine oil

By felipe casanova (200.74.71.5) on Wednesday, June 01, 2005 - 07:53 pm:

the appropiate oil that honda recommends is 10w-40 MOTOR OIL!!! but i use 15w-40 and no problems at all!

By aryl (198.245.131.62) on Wednesday, June 01, 2005 - 03:31 pm:

do not use gear oil. use the motor oil of your preference. i use mobile one 5-30 synthetic and it works well. regular 10-30 would work fine. some here use ATF, but i havn't tried that.

By Maestro (Maestro) (62.135.90.42) on Wednesday, June 01, 2005 - 01:20 pm:

I know That there is experts Who can tell.I have a 1978 civic 1300cc I want to change THe gear Box oil There are two types of The oil 75W-140 And 75W-90. which one do u recomend ?