For the last couple of years there has been a lot of talk about the rotor coolant seal failing and flooding the drive unit which leads to loss of drive. Up until now there was no other alternative than to try to bake the coolant out or get a new drive unit from Tesla or a used one with questionable history.
Fortunately we have partnered with EVClinic in Croatia and Matris in Slovenia to develop the Ultimate Tesla Large Drive Unit Replacement!Â
**Currently this is available only as an in house installation service. Eventually we will provide the option to purchase this and ship the assembled drive unit to you. If you'd like more information please email chris@electrifiedgarage.com for wholesale pricing and availability
**Price is for parts and labor to be installed at either of our facilities in Central Florida or Amesbury Massachusetts.Â
Complete stator replacement
These new drive units feature a completely new stator design with state of the art epoxy coating. Resistance values are 3 Giga ohms vs the original 300 Mega ohms. Efficiency and performance are improved 5-10% on average. Vacuum potting of the epoxy resin provides significant improvement in thermal efficiency. They are tested at 2700 VDC, far exceeding the standards, which means that we perform a HIPOT Test, Dielectric Endurance Test, and a Dielectric Strength Test of the insulation to ground and not just an insulation resistance test.
Bearing and Seal upgrade options
We have partnered with EVClinic to bring their "Holy Grail" LDU eDrive Kit as well as FERSA with their Ceramic Bearing kit and seals. You have the choice of selecting either kit for installation.Â
Rotor Cooling options
You can either opt for having the rotor machined and use the new graphite seal from EVClinic that they have developed or opt for a coolant delete manifold. Retaining the cooling with the graphite seal is the preferred method and has been reliable for over 300,000 miles of real world use.
**If choosing to do the coolant delete the Ceramic bearing kit is recommended for heat dissipation.Â
Once assembled you will need to transfer your existing Drive Inverter assembly over to the new unit and return your old case as a core. No firmware updates should be required as the electronics are being swapped over to the new unit.Â
**If factory drive inverter has been damaged due to coolant ingress a replacement will need to be sourced. Price with depend on whats available in the market, Tesla doesn't sell the inverter separately.Â
You can see the testing data from the upgraded stators in the pictures.Â