If/when I rebuild the tranny, I fully intend to switch to synthetic ATF. However, I may need to reseal the tranny in the not-too-distant future. Would this also be an opportune time to make the switch, or are there internal parts (i.e. something other than the seals) that might be adversely affected by the synthetic ATF?

Thanks.

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14 E250 Bluetec 4Matic "Sinclair", Palladium Silver on Black, 158k miles
06 E320 CDI "Rutherford", Black on Tan, 177k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver on Tan, 144k mi, wastegate conversion, ALDA delete

19 Honda CR-V EX 72k mi
Fourteen other MB's owned and sold
1961 Very Tolerant Wife