Thread: Identifying LSD tranny's?

I'll copy the numbers and quantities later when I'm not at work. There were 3 models listed for the 91 B13 w/SR20, 5.9 pints, ~7 pints, and 7.8 pints.

As for VLSD vs. LSD taking more fluid, no idea, out of my element there. My B13 supposedly has a VLSD ("Viscous Liquid Snot Differential", according to Dave Coleman, which is why I remember!)

So we got LSD, VLSD, and NON-LSD being able to hold different amounts of fluid do to the ACTUAL part # of the tranny.......not the VIN number of the car if I read correctly.

What tranny is that in post #6? It does NOT look like the LSD or NON-LSD trannies in the how judging be the hump.



^What tranny is this? What car did it come out of? Part #?

All very good info guys, most or all of this should become some kinda sticky. It looks like I'm going to have to use the ol' visual method.

Yep, it's a B15 or P11 transmission. They look totally different.



The B15/P11 might have a different capacity than the older ones, but the "normal" LSD and non-LSD B13, B14, and P10 transmissions shouldn't have a significant difference from one another. They are all almost identical. It is very difficult to get all of the old fluid out. If someone filled up a tranny that had lots of old fluid leftover then filled another tranny that was almost empty, it would seem like they have different capacities. The B13, B14, P10 trans should somewhere around 3.5 to 4 quarts.

It would also be good to note, you're only supposed to fill it up about halfway. The fill hole is on the front in the middle. Once it spills out you stop filling. Some people fill through the speedo hole. If you do that, it's possible to waaay overfill it.

Ah ha - my Chilton manual says "Sentra" 5 MT'S from 1991 to 1996 (probably limited to USDM in scope, I guess) are one of the three following models, looks like although we know changes were made like the 5-speed fork, etc - capacity as follows:

RN4F31A - 5.9 pts
RS5F21A - 6.2 pts
RS5F32V - 7.8 pts

My '91 B13 took over 7.5 pts for the change yesterday, definitely is supposed to have a VLSD (ah-choo! oh, sore-eee!). I didn't measure exactly since I was just filling to the fill line until it was level with the hole. Sometimes the consumer Chilton and Hayne's manuals are not exact.

So maybe that A=non-LSD and V=LSD is right on target, it makes sense that the larger case (w/the bump) would hold more fluid.

My pic is kind out of focus, and 'xcuse the PS leak, the fitting above the boot has a very slow leak as I found out yesterday. But that's my trans, if I could find the serial number it should match up to a RS5F32V.

Btw thanks as always for all the info, I'd be so screwed w/o the forum, coming from a first-ever SR20 background

From under the front driver's side:

You've got to be kidding - my speedo cable was broken when I bought the car and I replaced it. Not only would it be hard to get to for filling, you'd have to have no concept to fill the trans there - that would be something like 80%+ full!

It is hard to get all the fluid out, learned that one back years ago working on my Altima. After warming things up to help the flow, now I drop the side angle toward the drain hole a little, i.e lower the driver's side just a little bit with the jack and drop my stands a notch. Since I was leaking some I didn't bother to measure, but it took ~3.75 quarts (7.5 pints) to refill after I lowered it back down level. The sensors on the side were responsible for the slow leak, they just needed about 1/2 to 3/4 turn with the big wrench, 19mm I think.

Just don't check the fill level with the car not level (duh, did that with my KA years ago and had to drain some - a lot). I was also happy to see the drain plug magnet wasn't coated with pieces of metal, either. Just a few flecks that easily can be accounted for given the trans/clutch/engine just met each other 8k miles ago.