I just bought a J1 transmission and the guy claimed it was LSD. According to my research the J1 never came with LSD, BUT when i look through the hole where the axles go through, its a straight-through hole with no "bar" or "pin" in it, which means it is an LSD, correct? It looks like there is a smaller gear in the middle instead of the "bar". Its nothing like i've ever seen before.

 

Pics? If you can't see through its not an LSD (unless its a Wavetrac which will have a solid plate when you try to look through.

 

the pics wont show for some reason... look at the crx/ef forum and check "ef yu" 's post, thats the pic

 

OEM viscous LSD.

 

THANKS! What transmission would this be out of? whats the pros/cons of this type of LSD?

 

It's an option in a lot of JDM transmissions.

Pros: It's an LSD

Cons: Doesn't work well, weaker than a helical LSD, permanently turns into an open diff if it gets hot (at that point it needs to be replaced)

 

Thanks. What is the best oil to use in this transmission? in your opinion

 

Torco MTF

 

could easily permanently turn to a spool too...seen that happen to a number of older diffs in jdm cable b series trannies.

 

can it be directly swapped out for a quaife?

 

No, you will need to change the final drive out as well.

 

For which transmission would i need to get a final drive out of? how can i tell if the existing viscous type LSD is working before i install it on my car? thanks a lot for the info by the way. appreciate it

 

No way to tell really, it has a sealed center section.

You would need a FD from either a GSR/ITR, LS, or B16. GSR/ITR for a B18C LSD and LS/B16 for a B16A/B18A or B LSD.

 

Is there any difference in the material/strength of these gears compared to that of an s1 or a1 integra LS transmission? I keep going through 3rd and 5th gears on stock motor power. I'm doing a mild boost setup in the near future too, b16a built on 15-20psi, would the stock j1 be able to handle this? If not what gearset do you reccomend?

 

Not sure. I'd go ahead and change out to a large spline trans (92-93 for cable transmissions).

 

large spline? what exactly is the difference between a 92 vs a 91 teg transmission?

 

I'm searching the same question too. Trying to figure out if an OEM helical LSD will fit in a cable trans. Don't really want to convert to hydro, but looks like i might have to.

 

The shafts (main and counter) have a larger OD and the gears have a larger ID on the 92+. Both are smaller on the pre 92.

 

thanks for your help