Which diff oil grade for a limited slip diff?

[Missy701]

I have a small leak coming from the rear diff on my '67 Mustang, I have a new pinion seal but I need to know what grade oil to use. It has a limited slip diff. Thanks

I did post this on the Mustangs forum but no-one seems to know :-o

[redvictor]

Missy701 said:

I have a small leak coming from the rear diff on my '67 Mustang, I have a new pinion seal but I need to know what grade oil to use. It has a limited slip diff. Thanks

I did post this on the Mustangs forum but no-one seems to know :-o

Is it a std diff or aftermarket?

[Missy701]

Thanks for the reply. I'm not too sure but I think it was manufactured by Motive Gear. I've just been through all the paperwork I have for the car and there is a mention of EP85/90. Does this sound right?

[anonymous-user]

Sounds right to me, that's pretty much standard issue, most diff oils will be around the EP90 mark.

[Missy701]

Ok, thanks for your help Andy and Lee Rick thought 90 would be ok but he wanted it confirmed so that if it chews up I won't blame him lol (Talk about passing the buck lol). =)

[chris89]

I am assuming this is nitrogirl46, is that mustang going up the strip soon?

[Missy701]

You assume right Chris lol. Well, it might be. The diff and the prop shaft will be sorted this week hopefully. It should be ready soon. Not sure about the driver though! And don't expect any fast numbers lol, I would like to manage an et under 20 though

[chris89]

will be good to see that happen, its been a while in the making! How goes the plans for flame and thunder?

[Missy701]

Yeah it's getting there but it's a lot better mechanically now than when you and me first saw it sat in that field eh? lol. Rick has overcome a lot of the niggly problems. I love driving it, I get butterflies everytime I'm about to take it out Plans for F & T going quite well thanks, just waiting for new seals for the brake calipers to come in from the states so there will be a bit of a thrash on it. He's looking forward to getting back in the drivers seat, it's been a long while. Will you be there with the Funny Car?

[Fred Dibnah]

Nice car you have there nitrogirl

[Missy701]

Thank you Fred My pride & joy

[TVRleigh_BBWR]

Make sure you get a LSD oil, as they else it will not be LSD for long.

[dont know]

For a LSD you need proper LSD oil allways used Castrol b373 in my competiton car. Google it

[Missy701]

Thanks fellas, I will use the oil you recommend.

[chris89]

I bet Rick can't wait to get out there again, its been a while! The rumour is we will be there with the funny car with a planned 2 runs to test some new parts in the gearbox, so I imagine I will be rather busy for the day, but any spare time I will be over to see you guys and lend a hand if needed. Will be good to be at the track with the car again, Germany seems like ages ago!

[Missy701]

I googled Castrol B373 oil but it says in the description that it is not suitable for road vehicles. My car is street legal and will be primarily used on the road so will this oil be unsuitable??

[Missy701]

Good to hear that the funny car is coming out to play, bet you can't wait. Be sure to come and see us, must have a beer at some point And yeah Rick can't wait it has been a long time. He is using the last of his C14 up before he changes the fuel system

[chris89]

beer and racing fuel, there's an offer hard to refuse! I just hope the weather is good, actually I will settle for just dry! The only down side being is I won't have time to enter the santa pod/practical photography competition, unless I sneak off of course!

[Missy701]

Fingers crossed for the right weather. You should enter the comp, you take some great shots.

I'm taking the diff pinion assembly to Geof Hauser on Monday, apparently changing the seal is very difficult to do without the right kit, it has a collapsible thingymajig in the wotsit and if this collapses then it's game over Geof says he can do it this bit for me and then we can put it back in the car.

[chris89]

[ it has a collapsible thingymajig in the wotsit, and if this collapses then it's game over ]




Great description there! when it comes to pressing in parts haing the right kit is esential not to bugger everything. I hope it goes smoothly and it is back on the street rather fast, which I am sure it will be

Thank you for liking the pictures, I have finally been talked into putting a portfollio together to show people, maybe a new job on the horizon, fingers crossed!

Did you decide on a picture for the flame and thunder page? I wonder if they will be doing a photo entry this year?