Tyler-

Spinning one tire of an open diff will spin both tires at the same time.

The key thing is that with an open diff, both sides will spin in the same direction (clockwise or not) which is in opposite directions in relation to the car (one forwards, one backwards). Clutch type LSDs will spin in opposite directions (one clockwise, one counterclockwise) or the SAME direction in relation to the car (both forwards or both backwards).

If that doesn't happen and you want to be absolutely sure if you have an LSD diff? Take it apart and look in the housing.

 

You are totally *** BACKWARDS!!, or is it Bass Akwards?!?!

OPEN DIFF, oppposite wheel will spin in opposite direct EX: spin the passenger side rear wheel clockwise, the driver side will spin counter clockwise. LSD spin the passenger clockwise, the driver side will spin clockwise as well.

EDIT: OK, after re-reading your post, it seems you sort of explain it corretly, yet incorrectly also. You just explained it in a confusing and overly complex manner. Simple....... if they spin opposite, its an open diff, if they spin the same, LSD.

~Mike............

 

When I spun my driver side tire counterclockwise (like it would if it was driving forward) about a 1/3 spin later the pass. tire spins the same way. Yet as far as I know, the diff was never changed. I was told I didn't by some, I did by others, did that, thought i did. When i drift it feels like both tires are spinning (when I understeer it doesn't )
So I don't know..... I'm guessing I do, its just the guy I got the car from might have forgotten, considering it came with all the checkups and oil changes since 1989. But he wrote up a sheet of all the aftermarket/rebuild changes, and nothin about the diff.

Now that were on the topic though, I did have a question. Can you weld an LSD? I'm gonna be turnin my fc into a track/drift car and wanted a full locking diff. So if I do have an lsd, can I still weld it?

 

Your explanation has always confused me and seemed incomplete, because it never sets down what "the same direction" is. I was thinking that might have been causing some of the problems for others as well, as "the same direction" can mean either:
- The same direction in relation to the car's directional orientation (forwards or backwards)
- Or the same direction in terms of clockwise or counter-clockwise.

Granted, I'm a software engineer who works with aggravating telecommunications equipment all day, and I've developed a kind of literal thinking that makes simple things complicated.

 

If you spin one like you are driving forward, the other should follow with a lsd.

 

Thanks. A bit pricy, but it is what it is.

I'm spoiled by the $60 Ford rebuild kit.

 

As mentioned above that would be wrong.

 

I have a '90 GTUs and it has a great limited slip. It's got a few more upgrades and hauls some *** but needs body and interior work

 

I did read it i just thought it was a typo they had for not putting down a specific model. Coupe it is then!

 

since the early 90's Mazda has been paring down the line ups to only have 3 sub models in each line.

For example even the RX-8, MX-5 and Mazda 3, now only come as a Sport/Base, Touring, and the GT. They may occasionally do a special edition like the Mazdaspeed 3 or Mazdaspeed MX-5 or the 40th AE RX-8, but the bread and butter stuff is all just three sub models since around '91.

 

I tested it last night on both an open diff and an LSD, and it did exactly what I said it did. I don't want to get into a pissing contest here, we're describing the same behavior.

I'll rephrase it, in case I'm being confusing:

From the viewpoint of having two people look at a differential while you're spinning it, one standing on each side of the car, spinning one wheel on an open diff in a clockwise direction will result in the opposite wheel also moving in a clockwise direction. They're spinning the same way if you're using a clockwise/counterclockwise reference.

If you're talking about moving the wheels in relation to the car's direction of travel, you're driving one wheel towards the front of the car, so the opposite wheel is being driven towards the back of the car. In this scenario, you'd say they're moving in opposite directions.

So, depending on which reference you're using, you'd describe the behavior in two different ways for the same thing.

 

No, you are making it utterly confusing, and 90% of the people out there will not get what you are saying.

Okay, lets make it simple... [shakes head that we have to go into this again since it is covered in the FAQ for FC and countless times on this board and even in this thread]

This is tested by ONE person. As he turns one rear wheel he looks across the underside of the car and also watches the opposite rear wheel.

For a clutch type LSD:

If you jack up the rear end, and turn one rear wheel (say forward for grins and giggles), and the other rear wheel moves the same direction (also forward) as you are turning the first wheel (without you touching the opposite rear wheel) then you have a LSD.

If you jack up the rear end, and turn one rear wheel (say forward again), and the other rear wheel moves the opposite direction (say backwards) that you are turning the first wheel (without you touching the opposite rear wheel) then you have a an open differential and no LSD or a worn out LSD.

If you are testing a Viscous LSD, a simular test can be done, but if the viscous fluid is cold, it may not lock up right a way and you will have to turn one wheel back and forth a couple of times with the other wheel blocked so that it can't spin to heat the fluid up enough for the viscous fluid to lock up otherwise you turn one wheel and the other just doesn't turn.

 

Thats bull **** there is a 91 gxl Cause Iv'e had one,!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

 

LOL, you had a 91 coupe that the dealer or previous owner slapped on a GXL sticker on.

There are several (and all only in Florida) that have said they have a 91 GXL because of the after factory installed stickers.

I personally suspect that the dealer got some A package coupes in, and thought the factory forgot to put the sticker on, so they did it themselves.

But as far as Mazda factory and Mazda North America is concerned, there was no such thing as a 91 GXL.

 

hahahah y is this thread still open lol...


woow the facts are there, and ppl still argue

 

so you laughing and are picturing me hitting my head against the wall of my office like this:

 

I dont mean to threadjack here but actually spec v sentras actually came with a Helical LSD. Im pretty sure you were talking about a base model though............so i guess this was a pointless post. -sorry-

 

Okay, replace sentra with Tercel

 

Thanks to all for the input