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Cold Transmission Shifting Issue

1449 Views 8 Replies 6 Participants Last post by  atif7x7
My 97 E420 with 158k on the odometer has issues shifting normally/smoothly when cold. Works fine when it warms up. By cold I mean Arizona cold not Green Bay cold. The shifting is a little jerky primarily for the 1-2 upshift and surges a bit until warm. I've started placing it in winter mode to avoid 1st until it warms up.

I am also wondering if the issue is maybe related to the e-throttle, but that is an electronic device and so doesn't warm up like the transmission does.

The fluid is correct and recent [less than 2k miles]. I haven't checked the level too recently though and plan to do that when I get home from work this evening. That's 18 miles traffic so it ought to be warmed up to 80c. I'll check the temp with my IR thermometer and see where it is level wise.

Odd? Common?

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Greg's on the mark; there is a leak. I put 1.5 lt in at it is just half way up the stick [between 25c and 80c ranges]. ATF on the floor . . .

Is there a common leak point I should start looking at?

97 e420
ETC connector. Common problem. Thats where I would start looking. If it is the connector, then you are in luck as the part is cheap and swapping it out is relatively simple DIY. Hopefully thats all there is to it and you are good to go. Keep us informed.
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