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Transmission Oil Cooler

SKU: FORGEMOTORSPORTSR352R
Forge Motorsport
GT-R R35 DBA NISMO
Transmisison oil cooler for the Nissn GTR by Forge Motorsports
$2,800.00

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Transmission Oil Cooler

Transmission Oil Cooler

$2,800.00

To produce the Forge transmission cooler for the R35 GT-R, Forge has teamed up with one of the world leaders when it comes to oil cooling, Mocal, and together they have produced a comprehensive kit that relies on both companies expertise and delivers excellent results.

The cooler itself is a massive 25 row 235mm wide Mocal unit, fully ducted into the spare duct on the front bumper which improves the coolers efficiency by over three times when compared to an un-ducted cooler. The ducting is now powder coated black for a neat install. The cooler is fed by braided -8 lines and Aeroquip aluminum hose ends. The hoses are covered in heat resistant sheathing, where necessary, to isolate them from heat sources, but also to prevent heat transfer between the feed and return lines. The cooler and lines adds 2 liters of oil to the system, taking the capacity to 12 liters. The pump is Mocal's own, delivering an amazing 5 liters of transmission oil every 30 seconds to the cooler – enough to pass all of the oil in the transmission through the cooler every minute!

The sump is manufactured in house at Forge's factory in Gloucester, England, from a single aluminum billet. The bottom of the sump has ridges machined into it to aid in removing heat from the gearbox . The feed to the pump is at the lowest point of the sump so that all of the transmission oil can be drained at a service by simply unscrewing the feed line, which is fitted with a re-usable dowty seal on the thread. As you may know, the stock Nissan sump leaves around 500ccs of oil behind that cannot be removed at a service without removal of the sump.

The transmission cooler system is thermostatically controlled so only comes on when the transmission oil reaches 100 deg C (212 deg F), and turns off again at 95 deg C (203 deg F). Alternative sensors e.g. on at 95 deg C and off at 90 deg C are available from Forge. As an aside, our testing has shown a 5 deg C differential in temperatures displayed on the MFD and those in the bottom of the sump (the MFD reads higher)

During our track testing in 22 C ambient (72 F), a 20 minute hard drive around Silverstone in England saw transmission temperatures of just 112 C (234 F) maximum, and during a 2.5 mile cool down lap, the cooler brought the temperatures down to the point the cooler turned off, i.e. below 95 C (203 F). Subsequent testing in September and October last year at Spa Francorchamps in Belgium and the Nurburgring in Germany resulted in maximum transmission temperatures of just 109 deg C (228 deg F) – this at the same time that Nissan were testing their 2011 model with temps over 130 deg C....

This is a COMPLETE kit – all nuts/bolts/brackets are included, together with a genuine Nissan sump gasket, and a bespoke wiring harness with all the connections pre-made. A CD is included that provides a full color installation guide around 40 pages long.

All Forge products carry a lifetime warranty against manufacturing defects, even if you sell the car. Mocal parts carry a one year warranty against manufacturing defects. This transmission cooler fits in with our range of tuning products for the GT-R including our header tank that adds 2 liters of extra water capacity to the cooling system, silicon coolant hoses and our race proven recirculating dump valve. All of our test cars were also fitted with our high performance front mounted intercooler complete with 70mm piperun which were run in the same rigorous conditions as the transmission coolers with zero issues.

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Transmission Oil Cooler


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