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Transmission Upgrades

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XDP 5R110 Modified Direct Clutch Solenoid XD306 34717 1.00 XDP 5R110 Modified Direct Clutch Solenoid XD306
5.00 5 1
$ 129.95
Increase longevity and performance of the transmission in your 2003-2010 Ford 6.0L/6.4L Powerstroke with the XDP 5R110 Modified Direct Clutch Solenoid XD306. While the 5R110 is a very stout transmission, there are some flaws. When a gear is commanded, a solenoid applies fluid to the appropriate clutch. Under normal conditions and stock horsepower levels, the factory solenoid is sufficient. If any performance upgrades have been made, you will quickly max out the capabilities of the factory solenoid. This causes clutch slippage, and over time will lead to transmission failure. The XDP 5R110 Modified Direct Clutch Solenoid provides more fluid, at a faster rate to keep up with your performance built truck. This not only extends the life of your transmission, it also provides you with crisp, firm shifts. The direct clutch is used in 5th gear and reverse. Don't be fooled by the others, XDP is the exclusive manufacturer and distributor of the modified 5R110 Direct Clutch Solenoid. All solenoids are built from brand new parts and are tested in-house on a Solx 2000 Solenoid Tester. Features:Built From Brand New PartsModified Direct Clutch SolenoidFor 5R110 Automatic TransmissionsTested In-House on a Solx 2000 Solenoid TesterInstallation Note: The included plastic cap must remain installed on the end of the solenoid or damage to the transmission can occur. In some instances aftermarket transmission tuning will not work with the XD306 due to the tuning commanding excessive line pressure.
XDP EPC Solenoid Fooler Plug XD345 60220 1.00 XDP EPC Solenoid Fooler Plug XD345
$ 58.95
Increase the durability, line pressure, and performance of the Allison transmission in your 2011-2019 GM 6.6L Duramax LML and L5P with the XDP EPC Solenoid Fooler Plug XD345. From the factory, the function of the EPC solenoid is to increase line pressure during shifts up to 230 PSI and once the shift is complete, drop the pressure back down to 80 PSI. At 80 PSI your Allison can't hold the added stress of aftermarket upgrades or even towing a heavy load.The XD345 installs on the EPC Solenoid and installs back into the valve body allowing your transmission to effectively operate at 230 PSI all the time. The line pressure increase helps to eliminate clutch slippage, poor shifting performance, and it extends transmission life. The EPC Fooler Plug is easy to install and does not require valve body or transmission removal. This product is an excellent modifications for any upgraded LML or L5P truck. Features:Easy Installation Increased Line Pressure Can Increase Transmission Longevity Enhances Transmission PerformanceApplication Note: The XD345 should not be used in conjunction with transmission tuning or other pressure adding modifications. Warranty Info: Products manufactured by XDP carry a 1-Year warranty against defects in materials and craftsmanship. The Warranty is Limited to one (1) year from the date of sale and limited solely to the parts contained within the product's kit. Click Here for full warranty policy.
XDP Transmission Cooler Thermal Bypass Valve (TBV) Upgrade XD343 50183 1.00 XDP Transmission Cooler Thermal Bypass Valve (TBV) Upgrade XD343
$ 99.95
Replace the problematic factory thermal bypass valve in your 2013-2018 Dodge Ram 6.7L Cummins before it causes catastrophic failure with the XDP Transmission Cooler Thermal Bypass Valve (TBV) Upgrade XD343. The OE thermal bypass valve is designed to route bypass the transmission cooler in cold temperatures in order to bring the transmission up to operating temperature faster. Unfortunately, the bimetallic valve commonly fails in the closed position, causing hot transmission fluid to constantly circulate right back into the transmission, never, or barely, passing through the cooler at all. This results in excessive transmission temperatures, potentially damaging your transmission and leaving you stranded on the side of the road with not only an expensive tow bill, but a costly repair bill as well!XDP's Thermal Bypass Valve Upgrade utilizes an unrestricted straight through design, eliminating the recirculation aspect of the factory TBV. No more having to worry about when the factory part will fail you. By removing the passageway that returns hot fluid back to the transmission, fluid restriction is reduced, lowering overall transmission temperatures. A transmission that runs cool will last longer than one that's always hot. Installation is just like installing the OE part, requiring no cutting or modifications to the factory lines. To prevent leaks before they start, Four (4) new O-rings are supplied as well as two (2) quick connect fittings, making for a complete bolt-on kit for the 68RFE and Aisin AS69RC transmissions.Features:Direct ReplacementEliminates Hot Fluid RecirculationCooler Transmission TemperaturesNo Modification Needed For InstallationReplaces Factory Thermal Bypass ValveFits 68RFE and Aisin AS69RC TransmissionsReplaces OE Part #: 68186711AA and 68186711ABNote: Will also fit Hemi trucks equipped with a 545RFE, 65RFE, or 66RFE transmission. Warranty Info: Products manufactured by XDP carry a 1-Year warranty against defects in materials and craftsmanship. The Warranty is Limited to one (1) year from the date of sale and limited solely to the parts contained within the product's kit. Click Here for full warranty policy.
XDP X-TRA Cool Direct-Fit Transmission Oil Cooler XD309 34756 5.00 XDP X-TRA Cool Direct-Fit Transmission Oil Cooler XD309
5.00 5 8
$ 204.95
The XDP X-TRA Cool Direct-Fit Transmission Oil Cooler XD309 is a direct upgrade for the factory transmission oil cooler in your 2001-2005 GM 6.6L Duramax LB7/LLY. XDP’s XTRA-Cool Transmission Oil Coolers are made using techniques borrowed from the HD and semi-truck industry to provide you with the ultimate in strength and durability. Built for more than just increased strength, the XD309 features a high-efficiency core that is specially designed to maximize transmission cooling potential over the factory unit. Each kit comes ready to install with the needed fittings, brackets, and hardware to make this a bolt-on installation for your GM Duramax/Allison powetrain. Features:Direct-Fit Replaces Factory CoolerUpgraded Design For Increased DurabilityHigh-Efficiency Core To Maximize Cooling XD309 Specifications:Core Width: 12-1/2" Core Height: 7-3/4" Core Thickness: 2" Overall Length: 16" Cooler Fittings: 7/8-14 UNF Application Notes:XDP cannot guarantee fitment with all aftermarket transmission lines.Please match aftermarket lines with the cooler fittings specified above. Warranty Info: Products manufactured by XDP carry a 1-Year warranty against defects in materials and craftsmanship. The Warranty is Limited to one (1) year from the date of sale and limited solely to the parts contained within the product's kit. Click Here for full warranty policy.
XDP X-TRA Cool Direct-Fit Transmission Oil Cooler XD310 34757 7.00 XDP X-TRA Cool Direct-Fit Transmission Oil Cooler XD310
5.00 5 2
$ 244.95
Upgrade the factory transmission cooler in your 2006-2010 GM 6.6L Duramax LBZ/LMM with the XDP X-TRA Cool Direct-Fit Transmission Oil Cooler XD310. Manufactured to provide you with the ultimate in strength and durability, XDP’s X-TRA Cool Transmission Oil Coolers are made using techniques borrowed from the HD and semi-truck industry. X-TRA Cool Oil Coolers feature a high-efficiency core to maximize cooling potential for your Allison transmission. Each kit comes ready to install with the brackets, hardware, and necessary fittings to make this a bolt-on installation.Features:Direct-FitReplaces Factory Cooler Upgraded Design For Increased Durability High-Efficiency Core To Maximize Cooling XD310 Specifications:Core Width: 20" Core Height: 4-5/8"Core Thickness: 2" Overall Length: 23" Cooler Fittings: 7/8-14 UNFApplication Notes: XDP cannot guarantee fitment with all aftermarket transmission lines. Please match aftermarket lines with the cooler fittings specified above. Warranty Info: Products manufactured by XDP carry a 1-Year warranty against defects in materials and craftsmanship. The Warranty is Limited to one (1) year from the date of sale and limited solely to the parts contained within the product's kit. Click Here for full warranty policy.
XDP X-TRA Cool L5P Transmission Cooler Thermostatic Bypass XD396 80851 1.50 XDP X-TRA Cool L5P Transmission Cooler Thermostatic Bypass XD396
$ 78.95
The XDP X-TRA Cool L5P Transmission Cooler Thermostatic Bypass XD396 helps lower temperatures and prolong the life of the Allison transmission in your 2017-2019 GM 6.6L Duramax L5P. From the factory, the L5P Duramax trucks are equipped with a transmission cooler bypass valve. The factory installed thermostatic valve is designed to provide quicker warm-ups in cold weather. While this is a great idea in theory, failures in the field are proving that this factory design is unreliable and causes excessive heat in your transmission.The issue with the factory bypass valve is that the design restricts flow, and when the thermostat fails, it causes the fluid to bypass the transmission cooler completely. This results in elevated temperatures, premature transmission wear, and in some cases can lead to early transmission failure. Once line pressure is increased with common performance upgrades, the issue becomes compounded from the added pressure and heat. The XDP XD396 Thermostat Bypass is a completely re-designed bypass block made from 6061 billet aluminum. This bypass valve removes the factory thermostat and allows for unrestricted flow to the transmission cooler at all times. This unrestricted flow can provide up to a 50 degree drop in transmission fluid temperature! This results in better cooling, less wear and tear, and in many cases can help extend transmission life. This valve also allows for a transmission fluid flush without requiring a hot flush machine as there is no thermostat required to open. Features: Made In The USA!Direct-Fit Replacement No Cutting Of Factory Lines Easily Installs With Hand ToolsHelps Improves Transmission Life Eliminates Hot Fluid RecirculationLowers Transmission Fluid Temperature Up To 50 DegreesWarranty Info:Products manufactured by XDP carry a 1-Year warranty against defects in materials and craftsmanship. The Warranty is Limited to one (1) year from the date of sale and limited solely to the parts contained within the product's kit. Click Here for full warranty policy.
XDP continues to closely monitor the COVID-19 (Coronavirus) outbreak. As an integral part of the automotive supply chain, at this point all call centers and distribution centers remain fully operational to ensure we keep vital service components flowing to vehicles used in transport of goods and emergency response. To ensure the health of our employees, families, and customers, we have made the following procedural changes:

  • UPDATE: Effective 6/1 Customer Service resumes normal business hours of M-F 8:30 – 9:00pm EST.
  • Effective 3/18 we have decided to temporarily close both of our retail stores in NJ and NV.
  • Our technical sales team remains available Mon-Fri 8:30am-9pm and Saturday 10:30am-7pm EST.
  • All employees have been encouraged to follow the CDC's recommendations at home and in the workplace.
The circumstances of this virus are fast moving, as such, we will continue to update you with any further operational adjustments as needed. As always, we value your business and appreciate your patience as we manage this situation together.