RC-F Differential into IS-F?
10-01-16, 05:40 AM
#17
I paid around 1000$ vs over 2500$ for the OS. Doesn't justify the 1500$ difference for just oil changes.
As for the torsen, you can't compare them performance wise. There is a bit more chattering in a clutch type but the feeling is addictive.
10-02-16, 02:28 AM
#18
I can't speak for the performance capabilities of the ATS Carbon LSD but in regards to the OS Giken differential, both the IS350 and IS-F are among the lucky few models which sport the full set of 28 clutch plates inside the LSD as well as the 3rd generation TCD clutch plates which allow for an even more progressive lock-up compared to the original Super Lock LSD. Much like a Torque Vectoring differential, the OS Giken TCD will literally pull you through every corner using the rear outer wheel and drastically changes how you would normally approach your driving line. As others have quoted on the internet: “The OS Giken is a cheat code. Absolutely unreal what you can do with a rear end with it”.
Last edited by redspencer; 10-10-16 at 12:38 PM.
10-09-16, 10:28 PM
#19
Tech Info Resource
iTrader: (2)
I can now say I've driven the 2011 Torsen and the OS Giken back to back, and the Giken is significantly better. If I keep my Supra, I will put a Giken LSD in it, it really is that much better.
10-10-16, 09:53 AM
#20
I have to agree with Lance. After driving the Giken it IS BETTER. It's really hard to describe but imagine an invisible force rotating your car around a corner with confidence and without oversteer.
10-10-16, 10:27 AM
#21
Most torsens I've driven have behaved mostly the same. Predictable.
Clutch LSDs vary quite a lot. Some are pretty tame. Others are very harsh in their engagement.
For a street car, torsen is almost always my favorite. Viscous diffs do alright for mud and snow. A properly tuned clutch diff is probably best for the track.
Clutch LSDs vary quite a lot. Some are pretty tame. Others are very harsh in their engagement.
For a street car, torsen is almost always my favorite. Viscous diffs do alright for mud and snow. A properly tuned clutch diff is probably best for the track.
10-11-16, 12:22 PM
#23
As was said, the IS F and RC F use the same Torsen differential unit. The case however is very different, as is the pinion flange that bolts to the driveshaft. If you got an RC F differential and disassembled it, the internals could be swapped into an IS F unit, but the entire pumpkin will not be usable in an IS F.
Again it depends what your goals are here, as for some people (like myself), a Torsen may be the way to go as I find it predictable and good for daily use. If you are looking for some track action, I would say get something like the OS Giken. It's a fantastic differential.
Jeff
Again it depends what your goals are here, as for some people (like myself), a Torsen may be the way to go as I find it predictable and good for daily use. If you are looking for some track action, I would say get something like the OS Giken. It's a fantastic differential.
Jeff
10-12-16, 11:45 PM
#25
They do actually appear to be the same pinion flange (41204-30040), however they have very different diagrams in the parts catalog for some reason. Not sure how I missed that.
It seems possible that the RC F differential may in fact fit the IS F. There are some different part numbers for the assembly and others, but it may end up being a "you have to try it to see if it works" type of situation...
Jeff
It seems possible that the RC F differential may in fact fit the IS F. There are some different part numbers for the assembly and others, but it may end up being a "you have to try it to see if it works" type of situation...
Jeff
10-13-16, 04:26 AM
#26
Pit Crew
That is what I found, too, with the fiche showing the wrong picture. The RC F diff appears quite similar to the IS F... As in the same mounting points could possibly be shared.
10-13-16, 12:34 PM
#27
Tech Info Resource
iTrader: (2)
With the RC F's completely different rear subframe, it's anyone's guess if it is a bolt in fit or not. The 2IS and 3GS all share the same rear subframe, so it is pretty likely you could bolt in any diff from any of those cars from a physical fitment perspective. It would really be nice to know if they kept the same dimensions on the 3IS and RC models.
