Differential Gear Oils
03-26-2017, 01:18 PM
#11
I have all of the tools to do the work myself. Wood ramps to drive the front end up onto, to allow the (not so) low profile jack to lift the front end onto hefty jack stands, followed by the rear end. Once up on all 4 jack stands the car is very steady. The correct size sockets and wrenches pay for themselves in one fluid change.
03-26-2017, 01:34 PM
#12
75/110 is the updated proper Honda spec. Or can use 75/140. Both are acceptable. I prefer 75/140 for the extra protection on my higher mileage diff that sees hard use. The viscosity should effect torsion engagement to some degree also. Thicker oil should offer a quicker positive engagement at both wheels. But its the hot weight that is thicker, not the cold weight.
I have been using what ever full syn 75/140 thats on the shelf/on sale for years. Usually castrol.
I have been using what ever full syn 75/140 thats on the shelf/on sale for years. Usually castrol.
Both hot and cold viscosity is actually thicker on a 75W-140 compared to 75W-90 or 75W-110W.
To the OP I would go for the Amsoil
03-26-2017, 01:34 PM
#13
Because the 90w Honda used back in 1999 they don't make today. The 75/90 thins down to much and the boundary strength is not as good when it gets to NOT(normal operating temperature). That is why a 110 or 140 is better. I know some run the 75/90 and all is fine but I want the better protection it(110 on up) affords my rear end.
ROD
ROD
03-26-2017, 02:00 PM
#14
It also makes a difference if you use a synthetic or conventional gear lube
Look at the cSt of the two
75/90 syn--------- 80/90 con
103@40c--------- 139@40
14.6@100c-------14.5@100c
That is 35% thicker @40c with the conventional lube but the same when hot.
You can go thicker with a 80/140 conventional but that is so thick when cold, hell its at 333 cSt@40c
Thats why Syn. is so good, not to thick when cold and if you get 110 or higher not to thin when its hot. Best of both worlds, go synthetic.
ROD
Look at the cSt of the two
75/90 syn--------- 80/90 con
103@40c--------- 139@40
14.6@100c-------14.5@100c
That is 35% thicker @40c with the conventional lube but the same when hot.
You can go thicker with a 80/140 conventional but that is so thick when cold, hell its at 333 cSt@40c
Thats why Syn. is so good, not to thick when cold and if you get 110 or higher not to thin when its hot. Best of both worlds, go synthetic.
ROD
03-26-2017, 06:32 PM
#16
Thread Starter
Thanks everyone. You have given me a good education that I can understand. I have a Preferred Customer account with Amsoil, so the prices for their fluids are better that the retail price. I'm already using Amsoil in the engine and am switching to 0W-30 synthetic. I'm most likely going to use the Amsoil 75W-110 for now for the diff. I haven't been to the track in about 5 years, so in-town driving and open highways don't allow me to push it too hard at this time. If I ever go back to the track, I'll consider the 75W-140,
03-26-2017, 07:35 PM
#17
Registered User
I refuse to pay a dealer to change the oil, transmission or differential fluids since is too easy to do those jobs myself. I was not aware that Honda now has diff fluid for the S. Most people that I have talked to seem to use one of the three fluids that I listed.
Dies anyone have thoughts positive or negative on these oils?
Dies anyone have thoughts positive or negative on these oils?
03-26-2017, 09:06 PM
#18
My car dosent like Honda trany fluid. Always had a grind in 2nd when shifting at track. Switched to redline and shifts like butter. The MTF from Honda has the consistency of water. I wanted something a tiny bit thicker. And for the diff I went with Motul.