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2 Posts
Hello people
I was pointed to the forum as i m facing some issues with my 722.6 gearbox and you are lucky to have among you some of the best experts in this particular transmission.
My car is only a hybrid with a Mercedes heart and muscle but i really need some inputs on the culprit.
Today I took advantage of the free time and went out on highway for a ride as i wanted to see how it s running on the current cfg.
After a 15 miles highway route, just cruising 2000 rpm and accelerating 3-4 times untill 4000rpm, i come to a complete stop and notice that the car won t drive untill i push the throttle. Regardless in Drive or Reverse, the car was abnormally not moving. I stopped, checked the fluid, then restarted and... everything was back to normal.
Now, considering the extensions this transmission have, it might sound like a real problem since is bolted to an OM642LS engine with currentlly 320hp/700nm of torque which he must transfer to a Jeep Wrangler JK powertrain ( NV241 Transfer case - Dana 44 axles - 35in Tires ).
The transmission came out from a '07 Jeep Grand Cherokee WK 3.0CRD, on a build sheet i got online is listed W5J400 but on a sale list it is marked W5A580.
There s a lot of questions popping out in my head. Was this a software related issue?Was it mechanical? She can t handle the new hp/torque numbers? I didn t put enough oil? Because even if the oil level is 75mm at 150 F degree, i had previouslly upgraded the pan to a bigger and more cooling efficient style, so should i add more? If i need to upgrade the transsmission parts what are the best options to look for? Sonnax parts?Valves?Pumps?Transgo kit?Clutch discs?What friction plates? If i need to upgrade the TC, what is the right choice?
Any input is highly appreciated, thank s in advance and Merry Christmas to all.
I was pointed to the forum as i m facing some issues with my 722.6 gearbox and you are lucky to have among you some of the best experts in this particular transmission.
My car is only a hybrid with a Mercedes heart and muscle but i really need some inputs on the culprit.
Today I took advantage of the free time and went out on highway for a ride as i wanted to see how it s running on the current cfg.
After a 15 miles highway route, just cruising 2000 rpm and accelerating 3-4 times untill 4000rpm, i come to a complete stop and notice that the car won t drive untill i push the throttle. Regardless in Drive or Reverse, the car was abnormally not moving. I stopped, checked the fluid, then restarted and... everything was back to normal.
Now, considering the extensions this transmission have, it might sound like a real problem since is bolted to an OM642LS engine with currentlly 320hp/700nm of torque which he must transfer to a Jeep Wrangler JK powertrain ( NV241 Transfer case - Dana 44 axles - 35in Tires ).
The transmission came out from a '07 Jeep Grand Cherokee WK 3.0CRD, on a build sheet i got online is listed W5J400 but on a sale list it is marked W5A580.
There s a lot of questions popping out in my head. Was this a software related issue?Was it mechanical? She can t handle the new hp/torque numbers? I didn t put enough oil? Because even if the oil level is 75mm at 150 F degree, i had previouslly upgraded the pan to a bigger and more cooling efficient style, so should i add more? If i need to upgrade the transsmission parts what are the best options to look for? Sonnax parts?Valves?Pumps?Transgo kit?Clutch discs?What friction plates? If i need to upgrade the TC, what is the right choice?
Any input is highly appreciated, thank s in advance and Merry Christmas to all.
