Transmission oil pump

[450sl]

Hi All

I've got a 450 SL and its automatic transmission is being overhauled (722.001 (W 3 B 050) 116 270 1401 041335)

The Primary Oil Pump has the markings 100 277 10 20 and the Transmission shop is of the opinion it needs to be replaced as a 'lip' was created as the 'center ring had fallen out' and thus the housing is worn.

According to my manual, the part# should be 100.277.07.14
And according to EPC it should be 116.270.08.90 it also appears that Mercedes re-manufactured these as 116.270.08.90.81

My questions:
- Is there anybody that is aware of the pump, and the problem described (is it a real problem or is it fine)
- Are the part numbers correct?
- Would a second hand part be ok, or if replace then replace with new?!?

Kind regards
Marco

[Mercmad]

You MUST replace the pump and the convertor spigot (A116 272 09 20 ). The 116 number is the new part for the spigot . Using the spigot again will result in wear and leaks and even result in Spigot failure which will destroy the trans.