The GM 5l50 transmission in these older e53 X5's is quite horrible slushbox. But lets bring this BMW X5 straight to 2025 and upgrade it with modern 8HP transmission. So I will swap in 8HP45x transmission out of a 535ix F10. This swap is made possible by CANTCU, that you can find here: https://www.canformance.net/product/cantcu-transmission-controller/
Instructions for CANTCU integration at ms4x.net site: https://www.ms4x.net/index.php?title=CanTCU_Integration
The Deutsch connectors at AliExpress: https://s.click.aliexpress.com/e/_olHVLr5
0:00 intro
1:13 disassembly
2:29 Old GM trans
3:31 more disassembly
8:51 new 8HP transmission
12:32 transfer case
14:30 fitting the new transmission
21:28 oil cooling
22:40 drive shafts
23:58 oil filling
25:53 wiring diagrams
29:33 CANTCU unboxing
31:05 wiring up the swap
39:44 setting up the CANTCU
44:36 first test
48:39 flashing the ECU
51:11 shifter install
56:09 conclusion
59:20 cost breakdown