LSD binding after fluid change

After lots of research I put lucas 80w-90 gear oil in my rear diff with 7oz of CRC posi trac LSD additive. Took it to a parking lot right after I changing the fluid. Cranked the steering wheel all the way to left and right the drove in circles. Both directions caused the truck to bind up. So other than draining a little fluid and putting more additive in, is there anything else I should be worried about or look at ? I doubt there's actually something wrong with the diff.

 

Not all Tacoma's require the LSD additive. List the year, model, etc. of your truck and someone will confirm if it's needed.
It's my understanding from having read a few posts about this that if it's not required, no harm is done.
I'm not sure your problem was caused by a gear oil change. Your diff is in the back. You are doing tight turns up front.

 

Thanks for clarifying my diff is in the back. I have a 2006 Tacoma TRD sport, it's a LSD diff, I've got the sticker on the pumpkin, I wouldn't have just guessed and put additive in. I've done a lot of research on this, and a fluid change with not enough additive can be a cause since the clutches engage while turning causing the truck to bind in the back not front. I'm just curious how much additive other people have had to add cause I've never really hard of the LSD wearing out. It was better after some driving, but I'll admit I didn't really do figure eights just tight circles, but the binding is 100% coming from the back

 

Well, some LSD may be made with chemicals that are very bad for your brain! I would recommend against adding things to your LSD!

 

And allow me to clarify that you posted this in the wrong forum. You have a 1995. That's 1st Gen; not 2nd Gen

 

I missed that. Having a name and a signature that says otherwise doesn't help.

 

Everyone needs to chill out I just want some people's opinions

 

https://www.tacomaworld.com/threads...uring-tight-turns-forward-and-reverse.102184/

 

What kind of LSD do you think you have?

There are different kinds and not all have clutches that require additives

Did you look in your owner’s manual to see what it recommends? That is usually my first choice before researching on the web.

 

Unfortunately I don't have the manual, got lost a while ago. It's. 2006 so I'm guessing the earlier model LSD for the 2nd gen but I'll call Toyota and try to clarify, I talked to my buddy who's a Toyota tech, he said dump more additive in.

 

Why don’t you check your owners manual?
Don’t have one, go to https://www.toyota.com/owners/resources/owners-manuals and download one? Take the guessing game out of the equation then you don’t have to cop an attitude when folks are responding to your thread.

 

Your LSD is working.

And turning does affect the rear LSD. That is why they put open differentials in vehicles, lock the axles together front or rear and there will be an affect. This is what is happening to an extent.

LSD additive is to prevent lock up and create slip, it allows for turning corners and so it will not bind up.

I am not sure of what the requirements are for the rear of your vehicle, but it sounds like maybe you may have locking action going on. Not really a bad thing, unless all you do is pavement driving. You will wear your tire faster and if you hit the throttle hard you will spin both tires.... I doubt you will break an axle as the LSD or tires will give before an axle.

Take a look at the requirements, if it is a lighter oil or a synthetic (75W/90, 70w/140, 85w/140) that could be the cause. 80w/90 has been around for a very long time and was the mainstay. Newer oils are generally synthetic and lighter.

 

Thank you for a helpful response, I did use the 80w-90 after lots of people saying the synthetic can be to light. I'll look into what rear end I have, but from what it sounds like I think I'll just put some more additive in to smooth it out more then not worry about it if all goes well, but just to clarify should I expect zero binding in a tight turn on pavement ? Or would a little I'm guessing be considered normal ?

 

https://www.tacomaworld.com/threads/do-i-have-lsd-06-trd-sport.488629/

Maybe that will help.

 

Me personally, I would want more lock up. But I do a lot of off road and prefer a positive lock rather slip. If you do a lot of pavement and very little off road then you would want less lock up. It is normal to have some lock up, people use to complain that the factory LSD are crap cause they don't work very well. When they do work well people complain because it engages too much.

 

https://www.tacomaworld.com/threads/locating-toyota-owners-manuals-1996-to-present.585640/

http://www.customtacos.com/tech.old/files/05FSM/repair.html

 

Eh, the "weight" of the oil is 80w90. It doesn't matter if it is synthetic or not, its still 80w90.

 

Try using conventional (non synthetic) at the correct weight required, I think its 75w90 and a tube of the friction modifier. Mine did not like the synthetic and would always bind when making sharp turns. I use the cheap Valvoline gear oil and the CRC LSD additive and it has been fine since.

 

"Once upon a time" my son had a Jeep J-10/Gladiator with the infamous "Quadratrac". Twisted off the transfer case input with a mild 454 transplant and I had to rebuild it. The heart of Quadratrac is a LSD in the transfer case and open diffs on both ends (coupled all of the time). Anyway the Jeep manual said to fill the case with 30wt ashless motor oil and one 4 oz bottle of "Quadratrac" additive. Chrysler had taken over Jeep and did away with the Jeep additive - in favor of charging $30.00 a quart for "special Quadratrac oil". So I put the 30wt ashless in there and tried it out once around the block - miserable like a solid lock-up - scared I'd bust the damn input again before it was back in the garage. So I phoned a lubrication engineer I knew and asked what the hell was in the additive? He laughed and told me to go directly to the Chebby dealer and buy a 4 oz bottle of positraction additive. It was like $6.00 at that time! He told me to start by adding half the bottle of "friction modifier" and to keep adding until it was just slipperier enough to suit me (not binding or squealing tires). It took the whole bottle to get smooth - and I'm pretty sure it was probably the same stuff Jeep was selling before Chrysler showed up.

I'd say you have it right - just add until it seems to release enuff to suit you.