OEM Jeep Grand Cherokee transmission shifter module PCB has some design errors, is composed using cheap parts and low quality tin. Problems with original Grand Cherokee gearbox shifter boards occur due to major heating, bad soldering (low quality tin) and oxidation of VIA-s – that leads to components failure and breakdown resulting in gearbox going to error mode. We have seen 7 different versions of genuine shifter board, but they all have same mistakes. So Jeep has upgraded their shifter many times, but for some unknown reason all major mistakes are not fixed.
Shifter boards have been designed to last only till the end of the guarantee period and after that many “lucky” Jeep Grand Cherokee 2.7 CRD owners can eventually buy a new gearbox shifter module. Your dealer can sell you a new Shifter Lever Assembly (SLA). It will cost you about 800 euros and what you get is the same poorly designed spare part. In addition to that, your dealer sells you a new part without leather gear lever knobs, they are replaced with cheap looking plastic ones. There is no need to change the whole shifter lever assembly in your Jeep Grand Cherokee. It is enough if you change the faulty transmission shifter electronics board and your car will drive again.
There is a way to repair the PCB-s, but since it is not possible to stop the oxidation, no long term guarantee can be offered – it will work for a while only waiting the next component to fail. Also some of the chips used are known to brakedown and need to be replaced.
Below table shows the difference between original part and our board:
|Item||Jeep original||Our board|
|VIA-s (trace connection holes on board)||Copper, small holes (oxidation problems)||Copper, larger holes, coated with gold (Oxidation problem resolved)|
|PCB pads||Copper coated with tin||Copper coated with gold|
|Tin||Low quality, brittle and crumbly (cracks over time)||Highest quality, flexible (will not crack over time)|
|Parts||Some high, some low quality||All possible highest quality|
|Backlight||EL-tape and inverter, lifetime ca 4000 hours, light weakens over time, the inverter breaks||LED, lifetime 50000+ hours, light does not weaken over time|
|Reverse light switching||Always blink when you move lever over reverse gear||0.7 second delay, no blink when you move lever over reverse|
|Reverse light switch||Sometimes breaks (engineer forgot to add protection diode…)||Changed to more powerful and added protection diode|
|Heating||Major heating, over 100C (common problem why board breaks)||Minimal heating, no major heating components|
|Coating||Partial coating (the lacquer is sprayed on the board, but not everywhere, humidity can go beneath the coating)||Full coating (completely immersed in the varnish – twice (humidity can’t go beneath the coating)|
|Lever position accuracy||Poor, car can go into limp mode when shifter rod bushings are little worn-out||Good, car does not go into limp mode when shifter rod bushings are worn-out|
|Warranty||12 / 24 months||Lifetime|
|Price||About 800 EUR||305 EUR|
For best results we are assembling all boards in Estonian factory, so we can control all manufacturing processes.
Due to our high quality standards we can offer our PCB-s lifetime guarantee.
Retrieving major fault codes on Jeep Grand Cherokee:
Turn the ignition key until the digital odometer displays, repeat three times in succession and then back to “On” (On/Off, On/Off, On/Off, On). At the fourth “On” the odometer will be replaced with codes. If your car has a transmission electrical problem you can see P0700 or P0702 code. P0702 is generic fault, tells that transmission have an electrical fault. P0702 is stored in engine control module. For transmission control module fault codes contact your dealer to use proper diagnostics device as DRB III or Bosch KTS. You can also read/clear faults with our diagnostic software, based on ELM327 device.
Genuine shifter board have two kind of backlight inverter socket. Our shifter board uses LED-s instead of backlight EL-tape and inverter, there is no need to look at correct socket type anymore or remove backlight tape from old board (Blue light on letters P, R, N, D, 4, 3 etc…). New shifter board will fit to all Jeep Grand Cherokee 2.7 CRD model.
After you switch your PCB module, you probably need to erase engine and gearbox fault codes! Sometimes car will drive fine without clearing faults, but sometimes you need to clear them.
We will send all PCB-s worldwide via DHL from Estonia, EU. To Europe it usually arrives in next work day. Rest of the world will arrive in 2-5 work days.
THIS TRANSMISSION SHIFTER PCB ONLY FITS TO JEEP GRAND CHEROKEE 2.7 CRD DIESEL MODELS!
Changing a PCB will take about 20 min. and we will be happy to advice you in any problems.