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Messing with the tran pan can be a big mistake. Just getting the fill tube off is a potential disaster. And even if you do get the pan off, the refill just mixes about 4 quarts of dirty fluid with 3 quarts of new.
As for the filter screen, of the 3 or 4 I've seen before I stopped looking, all were as clean as new. And since Dec. 1990,Volvo has said it can be ignored (see TSB 17106 below).
My vote goes to the flushing method covered in the FAQ, and the Bentley 240 manual (same tran on 240s) — a complete fluid flush and replacement in about 45 minutes or less, with the car flat on the ground.
Originally posted by Gregg Shadduck on Thu Feb 10 08:06 EST 2005
TSB 17106
Dec 1990
"ATF filter cleaning deleted"
for 200/700/900
for all those AW 70/70l/71/72L transmissions
and for ZFHP22
(Does NOT apply to BW*)
"It is NO LONGER REQUIRED [capitalized in original] to clean and inspect the Automatic Transmission Filter..." [The tiny filter screen, which you get at, of course, only with SUBSTANTIAL effort.]
Advised to still replace the ATF fluid at specified intervals, and to flush the transmission cooling system.
700/900 FAQ Flush Procedure (applies to 240 as well).
--
Bruce Young, '93 940-NA (current), 240s (one V8), 140s, 122s, since '63.
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