How much additive do I need to add when doing a basic tuneup on my 87 N/A with an LSD rear end?

 

Start with the right oil and you will not need to add anything.

Ive never used an additive, synthetic or regular.

 

No one has any lsd oil. My options are rather limited, LSD additive, or just run it with out additive and hope for the best. I can get it in 4 oz bottles.

 

If you run without the additive you will hear grinding noise and the lsd might not even work. They should have the additive for cheap at autozone.

 

Get some GL5+ fluid. If you need to add an aditive to your diff oil it means you are starting with crap.

 

Greg there is GL5 for non LSD rear ends, and GL5 for LSD rear ends that allready have the additive in it.

No one where I lives carries GL5 with the additive already in it, just GL4, and GL5, as well as MT90. But they all pretty much carry the additive as well.

 

You can order GL5 Redline (I am not a big fan of Redline) off of amazon for $13 or so, and all walmarts carry their brand of GL5 gear oil.

 

I used the Mobil1 synthetic 75-90 in my diff, no additive either and it works and locks up perfect.

 

Every F150 Lsd requires Friction Modifier regardless of the oil you use. Even with high quality synthetic gear oil I've heard diff noise. If you want some good stuff for your car use Royal Purple gear oil, it's good ****.

 

Wrong, the ford stealership uses manual TRANSMISSION oil and adds a friction modifier to make it GL5+.

You cant make GL4 oil into GL5 by simply adding some additive. You can make it "GL5 like" but just cuz a dog pees on a litterbox does not make it a cat. GL5 has things GL4 does not, GL5 DOES NOT have things that GL4 does.

Way back when this was beat into my head the gist of it is that the coating on the clutches can be eaten away by gl4 or MT, now it is a very slow process and prolly not even worth mentioning but it has stuck with me ever since.

Why not get one bottle of oil that is continually tested and developed SPECIFICALLY for an LSD?

If your going to drive your 7 like an f150 any old oil with some goo in a tube will do, I abuse mine, it gets the proper stuff for that.

 

I'm not really gonna be giving it the beans, its just gonna be streeted, no track time.

 

Greg why do you sit here and talk to peole like they're retarded? You think I haven't done quite a few diff services? I've used high quality GL 5, 15 dollar a litre oil and believe it was 75w140 full synthetic and the diff still made noise and when we added the friction modifier that's what quieted it down. It's probably not the same in an Rx7 but I listed an example based on expierience.

 

Friction modifier is for quieting hypoid gear noise. Straight from Alldata is this Rear Axle Lubricant, Motorcraft SAE 80W90 rear axle lubricant Note: Use additive modifier Xl-3 or equivalent for complete refill of Traction Lok axles. So I got the weight wrong, and it's the ones with traction lok Lsds.

 

It depends on the brand, whether or not your internals are new, and your personal preference. Just read the label on the bottle and go from there.

http://www.summitracing.com/parts/RED-57904/

http://www.summitracing.com/parts/RPO-01300/

http://www.mazdatrix.com/q-supply.htm

http://www.racingbeat.com/RX7-1986-1...ion/11966.html

http://www.racerpartswholesale.com/p...ansmission_Oil

http://www.napaonline.com/Catalog/Ca...300_0021047487

http://www.napaonline.com/Catalog/Ca...975_0006411620

http://www.oreillyauto.com/site/c/de...2370&ppt=C1985

http://www.oreillyauto.com/site/c/de...2370&ppt=C1985

http://www.oreillyauto.com/site/c/de...2370&ppt=C1985



http://www.racerpartswholesale.com/p...alPurpleRacing

http://www.jegs.com/i/Red+Line+Oil/816/57904/10002/-1

http://www.jegs.com/i/Royal+Purple/831/01300/10002/-1

http://www.jegs.com/i/Lucas+Oil/639/10047/10002/-1

http://shop.advanceautoparts.com/web...7CGRP2035_____

http://shop.advanceautoparts.com/web...7CGRP2035_____

http://shop.advanceautoparts.com/web...7CGRP2035_____

 

No mazdatrix here
No Jegs here
No napa here
no racerpartswhole sale here

O'Reillys, Advance, and Carquest don't stock LSD Specific oil, just the additive and the regular GL5 everyone can use, and only a limited stock of that. I had to go to advance and oreilly's to get 5 quarts to do my car.

I'm not gonna pay the ridiculous prices for Redline I find on the internet when I can still get it for ~10$ a quart plus tax. Or better yet get a cheaper gear oil that is still synthetic and still works fine in a non high performance application. Sorry but this car just isn't high performance. Some you turbo-II guys may feel different but I've been around the block once or twice and know better. The 7.99$ bottle of oil is just as good for me.

 

takes slightly over 3 quarts and order the friction modifier if no one has it.

i would use GL5 with the friction modifier, the clutch units are far too pricey to guess with and spend the extra $10 on and wait 3 days for it to arrive.

guess what? it's been 3 days so far arguing about how no one stocks the stuff. now that we've wasted the time i will tell you that most car dealer parts departments have friction modifier, as most car lines have at least one model that requires it.

Greg, not sure i buy that any competent oil will do the job. clutches tend to chatter without the proper additive, perhaps if you hear it soon enough and jump on it then the clutches may be sacrificed. worst case the clutches wear unevenly and you're out an LSD(continual slipping). not all differentials are created equally and the price of a bottle of fric mod is low enough to just use it.

 

It would have been friday or next monday before the stuff got here. Just sayin, where I live I am not really willing to wait around a week on some oil when I can go into the store and get the stuff I need the same day for cheaper.

Also no mazda dealer. Did I mention I live on my own special side of nowhere?

 

Do you or a friend know an Amsoil dealer. It's good stuff. It still might take some time but it might not be as expensive as having Royal Purple Shipped to you.

 

any dealer.

 

Yes because I want to have to deal with the GM or ford dealer. This ******* thread isn't about where to buy lube, its about what the mix of additive to oil needs to be.

 

1 bottle, order it or deal with your podunk dealerships.

jesus.

why would i send you to the dealership to buy gear oil?

 

O'Reilly and Advance both stock LSD oil.

OK, then just buy it and STFU.

LOL

Your profile says Arab, AL, so that is where we assumed that you live. If you live somewhere else then you should change your profile.

You could try reading the label.