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NC MX-5 Built Transmission - 5 Speed

NC MX-5 Built Transmission - 5 Speed

$1,700.00 USD
$1,700.00 USD
Sale Sold out
Current lead time is 8 weeks on all built transmissions. Please note that lead time is the approximate time that we will start on your order regardless of the time that your order is placed or when your transmission you shipped to us arrives. The lead time for your transmission begins when the order has been placed. The 5 Speed is a popular option for racers, as it allows a higher speed in each gear, and less shifting. Until recently, the 5 speed transmission was only an option for low power builds that don't include power adders, and would start to fail around 170hp. We've addressed these issues, and built the 5 speed to handle significantly more than that. Now you can enjoy taller ratios and higher speed per gear on your higher power builds, and race cars. Currently, we provide two options for NC transmission builds. Prices listed include a useable core exchange or rebuilding your current transmission. A core charge of $750 is applied in addition if no core is provided.
Stage 1 - $ 1700 plus shipping
Stage 2 - $ 2200 plus shipping (Temporarily Unavailable)
Shot Peening-$ 200
Stage 1:
-Gearboxes are completely torn down, go through an extremely detailed qualification process, cleaned, and rebuilt, replacing seals, synchros, any failing gears/parts and are built with upgraded bearings.
-Modifications are done to improve oiling and cooling of problem areas.
-Machining is done to gear engagement teeth to improve gear engagement feel. Most race boxes get different engagement teeth timing to improve ability to shift for specific gears, so racing style and applications are important to disclose prior to rebuilds.
-Gear tooth machining to reduce temps, noise, and improve oil evacuation.
-Shift-bias modification for better shift feel and help to ensure proper gear engagement.
-Upgraded bearings to handle higher performance and higher speed applications.
-Gearboxes are built using hardened studs versus bolts. This provides a stronger and more reliable clamping force of the transmission case which results in maintained gear alignment and dynamics creating a stronger, higher power capacity transmission that will last longer.
-Partial break in on a bench dyno for verification.

Stage 2: Highly recommended for racing/track applications using an aftermarket limited slip and or using slicks, for higher powered applications, and for applications using a lightweight flywheel and/or and unsprung clutch disk. Note: We do not recommend the use of lightweight flywheels and unsprung clutch disks. Both severely increase shock loads on the gear train with little to no measurable increases in performance.
-Includes all of stage 1
-Cryo treated gears for increased gear strength.
Shot Peening Option: Shot peening the parts in your transmission increases the surface strength of the gear. It will also increase oil retention of the gears which will help reduce transmission temps as well as wear and tear.
Please note these transmissions are built to order, and as such, note the lead time at the top of the listing. If you will not be providing a working transmission to be rebuilt, please select the 'no core' option when purchasing. If you are providing a core, you will be responsible for shipping or delivering the transmission to our shop before we will ship the built transmission out. If you would like to receive a transmission before you ship your existing transmission, you will have to select the 'no core' option. Once the new transmission is installed, please contact us to arrange a core charge refund. We reserve the right to adjust the core price depending on condition of transmission. While most transmissions that are replaced in working condition will receive the full core refund, transmissions with sheared teeth, or other catastrophic damage will be refunded at a reduce value. We recommend using Motorcraft XT-M5-QS Transmission fluid, and running the fluid for 1000 miles before flushing it and replacing the fluid. Transmission holds 2.1 Quarts of fluid, so the 5 quarts is enough to preform both initial break in, and refill after 1000 miles.
PLEASE NOTE: Transmissions must be drained of fluid before sending in for repair or core charge. A $25 clean up fee will be charged if the transmission arrives full of fluid. Core return must arrive at Walter Motorsports no longer than 30 days after shipment of built transmission to be eligible for core charge refund. Cores received later than 30 days after shipment of built transmission will not be eligible for core charge refunds. Please reach out to us directly with any questions about this policy.
Note: All transmissions are shipped in an igloo cooler which is charged to the customer. This is the most secure method we have found to ship transmissions without damage. Please keep the cooler to send the transmission back for refreshes or rebuild in the future.
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