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, 159k miles
06 E320 CDI "Rutherford", Black on Tan, 178k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver on Tan, 145k mi, wastegate conversion, ALDA delete

19 Honda CR-V EX 75k mi
Fourteen other MB's owned and sold
1961 Very Tolerant Wife

That would be a great time to switch. I switched mine about a year after it was re-sealed, and its been great so far! I also switched our '83, which has never been resealed or messed with and it has also been fine. I say go for it! Its better for the tranny and shifts are better and it runs smoother. Well worth it.

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'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)

What is the process of resealing? Which seals are being replaced? I have a leaky transmission. Any kits available?

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'85 300D Cal 280,000 miles
'14 GLK 350 60000 miles

I haven't heard of trannies springing leaks like engines when switching to synthetic ATF.

Sixto
93 300SD

I switched my '83 to Mobil 1 ATF about 2,000 miles ago - so far so good!

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2009 VW TDI Jetta Sportwagon 172k miles (rear-ended harder than Elton John on 8/4/13. Total loss)

1991 Volvo 240 142k miles (T-boned by a stop sign runner. Total loss)

My 82 SD just had a full rebuild. $$ they filled it with recommended ATF. how many miles should I wait before switching to synthetic? none? 10K ?? I figured I would put a few hundred miles on it before bothering to switch.
opinions?
John

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1987 190D 2.5Turbo
1987 560SL convertible
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1987 300TD
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Wait at least until the warranty on the rebuild is over. If it were mine, I'd do it at the next scheduled ATF change after that.

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