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Transmission interchangeability question (87 vs 90 16 valve) 700

posted by  awilson on  Wed Jul 11 14:37 CST 2012
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last visit: Wed Mar 5 15:30 CST 2014
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I have an opportunity to buy for cheap, an otherwise very good condition 1987 740 sedan with only 126K miles, because the transmission has failed.
I have a 1990 745 GLE 16 valve donor wagon.
============
Assumptions:
AW72 trans in the 1990 16v, going to crawl under to verify if lockup or not.
The 1987 has an AW70/AW71 trans, possibly AW71L lockup, haven't seen yet.
==========
Questions:
Are these two trans bolt up ready, dimension wise?
If the 87 does not have a lockup and the 90 does, how hard is it to run the wire from the computer for the solenoid?
Any other caveats I should know?
--
Optimist - half full, Pessimist - half empty, Engineer - The capacity is twice what it needs to be.






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