My cars transmission will not engage

PORTHOS1

MEMBER
1998 BMW 540I

My cars transmission will not engage. Forward or backward. I had a mechanic look at it and said the fluid was fine but the temp of fluid never changed when the car warmed up. Like its not pumping. Any ideas? I recently installed a newer engine. Did I do something when I did that?

7 Replies

DOCHAGERTY

MECHANIC
9,601 POSTS

That is possible, this process could take several steps to get through, shall we continue?

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Tuesday, April 9th, 2013 AT 7:12 AM

PORTHOS1

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49 POSTS

Sure.

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Tuesday, April 9th, 2013 AT 12:06 PM

DOCHAGERTY

MECHANIC
9,601 POSTS

Good. First, did you properly index the torque convertor into the pump? What that means is did the TC come out of the tranny during the swap?

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Tuesday, April 9th, 2013 AT 8:08 PM

PORTHOS1

MEMBER
49 POSTS

Yes it did. It was attached to the flywheel on the old engine.

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Tuesday, April 9th, 2013 AT 8:22 PM

DOCHAGERTY

MECHANIC
9,601 POSTS

Then I recommend removing the transmission, remove and inspect the torque converter to see if there is an issue with the pump/torque converter interface.