[[email protected]]

HI guys,
I am currently looking for feedback from individuals who have had this diff installed in their GT-R. Looking for info on type of use (road course, drag strip, street use) and for how many miles. Overall impressions, ect, ect. I am thinking of installing this diff if/when I build my motor/transmission.

I most likely won't be changing anything on my current set up for at least a year but was hoping to get some feedback on this part in the meantime. I will probably bump this thread every so often in hopes of getting as much info as possible before I change my set up.

Thanks in advance for any insight. It is always appreciated.

 

[jm-imports]

awesome diff mate and easy to use on the street..

you will get the occasional wheel skip on full lock at low speeds but once you learn to balance the speed input and lock (its not really noticeble).

slightly noisy but similar to a uprated fuel pump noise, tbh the noise is mainly at idle and not moving.

on the move its great and helps keep the car straight.

all i can say is that its not like diffs on evos,supras or skylines were they feel (track car only)

 

[[email protected]]

awesome diff mate and easy to use on the street..

you will get the occasional wheel skip on full lock at low speeds but once you learn to balance the speed input and lock (its not really noticeble).

slightly noisy but similar to a uprated fuel pump noise, tbh the noise is mainly at idle and not moving.

on the move its great and helps keep the car straight.

all i can say is that its not like diffs on evos,supras or skylines were they feel (track car only)

Thanks for the info. If you don't mind me asking; How many miles have you put on this diff? Type of use? And how much pwr/trq are you making? My main concerns are that if I do this upgrade it will see a ton of "abuse" on the road course at higher pwr/trq levels running on slicks for extended periods of time. Thanks again

 

[jm-imports]

1000bhp torque was 860.

i did around 2500miles..

1000 miles hard use 1500 or so general driving

 

[[email protected]]

1000bhp torque was 860.

i did around 2500miles..

1000 miles hard use 1500 or so general driving

Good to hear!!! Thanks for the info

 

[paparazzi]

You might want to get in touch with COBB Tuning. IIRC they ran their GTR with the TCD Diff with good results and they have data to back it up as well.

 

[[email protected]]

You might want to get in touch with COBB Tuning. IIRC they ran their GTR with the TCD Diff with good results and they have data to back it up as well.

Good idea. I forgot that they were running the OS diff. I will send Bryan a PM.

 

[Se7enGTR]

Good idea. I forgot that they were running the OS diff. I will send Bryan a PM.

Contact [email protected] too..They were one of the first to test the OS diff.

 

[Martin Donnon]

We have tested the OS LSD extensively. We have one in our own track car.
It is indeed quicker than a stock LSD, mainly because of the stock LSD having 'zero' preload
Once shimmed up the factory LSD (which is a quality piece) behaves identically to the TCD - as you would expect - which is also why we engineered diff shims (WR35DS) to do exactly this.

The question you need to ask is 'Do I want to spend a few hundred dollars, or a few thousand?'
The results will be pretty much identical

 

[[email protected]]

Contact [email protected] too..They were one of the first to test the OS diff.

Thanks Shin. I will give Eugene a call.

 

[[email protected]]

We have tested the OS LSD extensively. We have one in our own track car.
It is indeed quicker than a stock LSD, mainly because of the stock LSD having 'zero' preload
Once shimmed up the factory LSD (which is a quality piece) behaves identically to the TCD - as you would expect - which is also why we engineered diff shims (WR35DS) to do exactly this.

The question you need to ask is 'Do I want to spend a few hundred dollars, or a few thousand?'
The results will be pretty much identical

Thanks for the info Martin. Quick question; Why are you guys running the OS diff in your race car if you can produce the same times with your shims installed? Seems to me it would make more sense to sell the OS diff and run your own product on your shop car if the results are as good or better. Thanks again.

 

[Martin Donnon]

Thats a good question.
We had the transmission down about 12 months ago, and thats when we installed the OS TCD in our GTR.
At this point in time we spent some time with the original diff checking and setting the preload etc to give similar performance.
We havent had the transmission out of our car since hence the OS stays, but have upgraded many others with WR35DS Differential shims.
Hope that makes sense!

 

[[email protected]]

Thats a good question.
We had the transmission down about 12 months ago, and thats when we installed the OS TCD in our GTR.
At this point in time we spent some time with the original diff checking and setting the preload etc to give similar performance.
We havent had the transmission out of our car since hence the OS stays, but have upgraded many others with WR35DS Differential shims.
Hope that makes sense!

That makes sense. I was just curious. Thanks for the clarification.