E153 LSD whine and recommendations

[chief1eye]

Looks like Ive picked up a whine in the LSD, after changing the oil and changing the engine to a 400ftlb monster. Took one good spin at the the recent track day and it started not long after that. Changed the gearbox oil a couple of times but whine is getting worst if anything. Noticeable when coming off the power or rapid deaceleration at high speed. When it comes to the actual gearbox and shifting its as sweet as it has always been, so other than the whine starting there is no issue.

Looking for advice in general on whines from the gearbox (LSD) and also if I was to replace recommendations. Obviously its putting down a lot more torque than the standard stock set up. 360hp( 260kw) and 400ftlbs (550NM).

Is anyone running aftermarket like Cusco, Quaife or KAAZ?

[GDII]

Is yours a factory viscous LSD? The LSD itself can't really whine, at least this type of LSD, it will be the final ratio doing that. The viscous LSD is a sealed unit and does not rely on the oil you put in the gearbox.

On the other hand a KAAZ, CUSCO or TRD plate diff is different. But still the plates wouldn't cause a whine. The Quaife ATB LSD could whine but the way it works means it shouldn't when driving normally. Only when you lift a wheel.

I know this is E153 but my S54 has whined for my entire 10 year ownership. It is coming from the diff.

[mickeyduck]

In my experience the oil is the kicker Ross. Makes a huge difference, whatever the car.

My SW runs Redline heavy shock. Try it if you haven't mate. Handles this:

[chief1eye]

In my experience the oil is the kicker Ross. Makes a huge difference, whatever the car.

My SW runs Redline heavy shock. Try it.

Initially I changed the really old oil to Penrite Pro gear 75W-90 thats sort of when it started at the Taupo track. Then I read a lot on the forums and have changed to to the Redline lightweight shockproof.
Probably whining a little more? Not terrible. Worth giving the Redline heavy a go you reckon??

Mate that dyno sheet is insane! Gotta get that thing to the track soon Charlie!!!

[mickeyduck]

In my experience the oil is the kicker Ross. Makes a huge difference, whatever the car.

My SW runs Redline heavy shock. Try it.

Initially I changed the really old oil to Penrite Pro gear 75W-90 thats sort of when it started at the Taupo track. Then I read a lot on the forums and have changed to to the Redline lightweight shockproof.
Probably whining a little more? Not terrible. Worth giving the Redline heavy a go you reckon??

Mate that dyno sheet is insane! Gotta get that thing to the track soon Charlie!!!

Ha ha no mate gotta get it going. Bloody thing. But yeah, try the heavy shock. For heavy grunt.

[Benckj]

2nd the Redline shockproof recommendation although I’d lean toward the LWSP.

On the LSD I’ve seen proof from rebuild pics that the fluid used is the trans fluid. I often though it was a sealed unit but believe otherwise now. Best to change over to the Redline and see if it makes a diff ( no pun intended).

[GDII]

2nd the Redline shockproof recommendation although I’d lean toward the LWSP.

On the LSD I’ve seen proof from rebuild pics that the fluid used is the trans fluid. I often though it was a sealed unit but believe otherwise now. Best to change over to the Redline and see if it makes a diff ( no pun intended).

Show me this proof. I'm keen to learn.

My understanding with the viscous LSD is that it uses a very thick oil inside the unit to 'lock' the housing to the output spline once the speed differential gets high enough.
A KAAZ, CUSCO, TRD and Quaife LSD does use the gearbox oil.

This is from Toyota themselves. Sure it's not the same differential we are talking about but it's the same concept.
https://youtu.be/qY3ZE5yevOQ?t=17m27s

[chief1eye]

yep. there seems to be quite a bit of debate in the US forum around the LSD being sealed /not sealed

seems to be a concensus that they are not totally sealed, see this link http://www.mr2oc.com/188-v6-mr2-forum/4 ... luids.html

[GDII]

OK I stand corrected. This particular viscous 'LSD' isn't a sealed unit. They are definitely built different to the open diff though.

[THR4SHER007]

In my experience the oil is the kicker Ross. Makes a huge difference, whatever the car.

My SW runs Redline heavy shock. Try it if you haven't mate. Handles this:

B00STN 370KW pump gas dyno sheet.jpg

How did you get that to produce so much torque?

[Alsw20]

In my experience the oil is the kicker Ross. Makes a huge difference, whatever the car.

My SW runs Redline heavy shock. Try it if you haven't mate. Handles this:

B00STN 370KW pump gas dyno sheet.jpg

How did you get that to produce so much torque?

It’s tractive effort at the rollers. It’s multiplied by the diff ratio.

[THR4SHER007]

Cool, thanks

[Gleshlich]

+1 for Redline LWSP. Expensive but well worth it

Looks like it should taste like bubblegum but it definitely doesn't.
Is it only at higher speeds that it does the whine? Just one gear or multiple?

[chief1eye]

I'll have to have another listen to find out exactly when. Noticeable at hard breaking - deaceleration from speed like 140 - 160 kph. And when in like 3rd when coming off the power, but I'll have to have a closer look to confirm exactly when. Does anyone else experience some whining symptons from their transmission?

[Malcolm]

Generally I think you'll get whine when you don't have enough clearance between a pair of gears, or you have damaged teeth running against each other. If it gets louder with speed rather than engine rpm, it pretty much means it's the bevel drive on the diff. For it to have occurred suddenly it's more likely to be damage rather than a clearance issue. It could also possibly be the tapered roller bearings that support the diff getting a bit too worn.

If you're lucky it's only minor damage and it might be sufficiently masked with a different oil choice, but it could also continue to get worse until it fails... My old gtfour developed a whine after a hard night at Meremere. It got worse the faster you went, and a couple of weeks later the bevel drive to the tailshaft output completely stripped.