If you have a GAP tool you can get a flash file from GAP to mate the mechatronic to your vehicle, Those codes are valve body related so updating the TCM to match is unlikely to solve your problem.

OBD Code P0735refers to
This diagnosis monitors actual gear position by checking the torque converter slip ratio calculated by Transmission Control Module (TCM) as follows: Torque converter slip ratio = A x C/B A: Output shaft revolution signal from revolution sensor B: Engine speed signal from Engine Control Module (ECM) C: Gear ratio determined as gear position which TCM supposes If the actual gear position is higher than the position (5th) supposed by TCM, the slip ratio will be more than normal. In case the ratio exceeds the specified value, TCM judges this diagnosis malfunction.
Symptoms
Possible sumptoms of OBD code P0735
- Engine Light ON (or Service Engine Soon Warning Light) - Incorrect transmission shifting
Causes
Possible causes of OBD code P0735
- Low transmission fluid level - Dirty transmission fluid - Shift solenoids - Transmission mechanical problems - Transmission hydraulic control circuit The Error code is generally activated on detection of the following conditions: P0735 is detected when A/T cannot be shifted to the 5th gear position even if electrical circuit is good.

P0729 is similar to P0735 but relates to 6th gear.

 

Do you know if the transmission for the V6 lr3 is the same as the 2008 l322? Looks the same. I think it's a zf 6hp26

 

Not sure about the petrol models but i do know that the petrol and diesel boxes don't interchange so i assume its the same with V6 and V8 since the bellhousing is cast into the trans case.