I made the mistake of attempting to rebuild my 1990 760 turbo AW71 transmission. I purchased the Volvo factory manuals, and followed the specs to the letter. I corrected the problem that I started with (no shift up into fourth),but now the car won't go into reverse after it's warmed up. When cold, the car drives and shifts normally, but after about ten minutes of driving the transmission starts to whine or "sing" ( sounds hydraulic-doesn't change pitch with RPM, but does change pitch when I pull on the kick-down cable with the tranny in PARK). I pulled the valve body off and dismantled, cleaned and reassembled it. No help. Checked the accumulator pistons, and they seem normal. Springs are in the correct locations, I think. The kick down cable moves freely. What an adventure. I'm ready to spring for a rebuilt unit from the dealer ($2000), but I really hate to admit defeat. Anyone have experience overhauling these units?

Larry: are you 1,000% sure about correctly attaching the kickdown cable inside the transmission? it's a 3-handed job, or so it seems; I would worry (easy for me to say!), that it's not attached correctly. The throttle-end of it should be able to be pulled +/- 3/4" to 1" sideways, then snap back, without looking like it's got any slack: not TAUT, but no slack. Try adjusting THAT end of it first, I'm sure you know that it's a lot easier than getting at the tranny end of it. I know that it has to be positioned 'just so' inside, and that it's a **tch to seat it properly. The only other thing that I can think oif is having another beer....oops, is that the rear seal isn't in straight, or the pilot bearing, or the flexplate, flywheel,...hey, thems more than ONE thing! Now, where's that beer...--PD (All disclaimers apply. Just as you would not drink and drive, don't drink and DIY. And when I'm under a car, it's supported and chocked 6 ways from Sunday, and I'm never alone...and it's got NUTHIN to do with still bein' ascared o' the dark!.)

The cable seems to be adjusted correctly. I tried giving it extra slack, but that didn't help. It moves freely and feels like it snaps alll the way back when I pull on it and let go.