So I’m just wondering if anyone else is experiencing this issue have an 07 s 600 that the first 3 to 5 minutes of driving 1st to 2nd shift is a very harsh and almost give like a shudder pretty violent 3rd to 4th 4th to 5th great and once the transmission gets to normal operating temperature it no longer occurs.. I have had the trans serviced with oe fluid with no change . It it a shift solenoid issue or programming issue . The trans feels very tight other wise no slippage . Has the 5 speed slosh box . No codes stored either . Any insight would be greatly appreciated