On the circuit and even with some hard street driving, GT-R owners will know that the transmission temperature has a habit of rising quite rapidly. To compound that, on the GT-R, the transmission is integrated with the rear differential housing and because of this, heat energy is freely transferred between them.

In Nismo’s testing experience, with their Tokachi 24hrs race car and their Super Taikyu R35, cooling the rear differential has been surprisingly effective at lowering transmission temperatures. So much so that they’re now releasing their in-house developed rear differential cooler as a kit for the GT-R.

The kit features a electric oil pump, braided hoses, cooler core, and wiring harness for automatic or manual in-cabin operation. When installed it increases the diff oil capacity by 2 liters which is a help by itself.

In Nismo’s testing of the ClubSport GT-R on Sodegaura Circuit in Chiba, they were happy to see the diff oil temperature at no time exceeded 140 degrees C. Exactly what the transmission temperature was like during the testing is not known though.

The diff oil cooler is due for release in April and we will have availability details at that time.

Source: GTR-World.net

Originally appeared on and © GTRBlog.com. 2010. | Read comments.

More from the guys at Gruppe-S today. This time they’ve documented the completion of their custom transmission mount for the G-Force 4-Speed dog box. As you’d know the GT-R’s rear mounted trans-axle has absolutely nothing in common with the engine mounted G-Force tranny so you could have foresaw the problems they’d have bolting it up.

Out came the welder and with a lot of hard work and effort the guys have put the problem behind them by fabricating a heavy duty support structure that should hold up to the stresses of drifting. As a result, the transmission is officially mounted in the car in addition to the engine which was mounted up last week.

What the guys will do with the rear subframe now there’s no transmission in it is going to be the next chapter in this story I’m sure.

Link: Gruppe-S Engineering Blog

Originally appeared on and © GTRBlog.com. 2010. | Read comments.

The GT-R’s front end is well designed for both cooling and aero purposes. It’s hard to improve on it but with enough dedication and application of sound principles and by putting a lot of thought into the design, the team at Mine’s did just that. The new Mine’s Dry Carbon Front Bumper which we debuted on GTRBlog in January is now ready and pricing has been released.

The bumper itself is priced at 890,000 yen minus the canards. The Mine’s Carbon Canard Type-II that integrate so well with the front bumper are priced separately at 160,000 yen. As a set the whole lot will be 1,050,000 yen in Japan.

On the topic of Mine’s they’ve also put together a FAQ sheet on the Mine’s power upgrades which are currently available. These upgrades aren’t factoring in the Mine’s Complete Engine or any other new power upgrades that may be in the pipeline.

These two sheets give details on what the upgrades consist of, the target power increases with a few technical details in there as well. There’s also a nicely formatted web version that is possibly easier to read.

Take a look at these sheets in the gallery below and head over to the Mine’s website to contact them if you have any more questions!

Link: Mine’s Website (English)
Link: Mine’s Tuning Upgrade Guide for Nissan GT-R

Originally appeared on and © GTRBlog.com. 2010. | Read comments.