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Question: "When I replaced my filter screen and filter gasket, there was only one filter and I replaced it w/ only one. What will be the consequences?"
I'm asuming that you meant to say that there was only one filter gasket and you put in only one filter gasket. I'll be honest, -I'm not sure. If you tranny didn't utilize a spacer block, then you'll probably be just fine. However, if there's a spacer block in there and only one gasket, you might get a small amount of air or tranny fluid sucked through the metal-to-metal seal. I wouldn't worry about it too much. -but if it were me and there was a non-gasketed metal-to-metal seal in there, I'd probably run my tranny 1/2 quart or more overfilled. (it's usually safe to run 1/2 quart over in any automatic transmission, and some can take a full quart extra with no problems or seal leaks, but ask your Volvo mechanic if you're unsure.) The next time I'm at the Volvo dealership, I'll ask if a spacer block is required in all the AW70/71 trannys and if you can get by with only one gasket.
Question: "I replaced the pan gasket w/ the cork type replacement from AutoZone and put nothing on bolts. Will the bolts work lose? Will it leak sooner with the cork gasket?"
I've never used a cork gasket on a tranny pan before, and I didn't even know that Autozone sold a cork version. My prior experiences with cork gaskets were on valve covers and they typically became saturated with oil after a few months. This put pressure on the bolts and if they weren't sealed with RTV, they typically backed out slowly over time. If I tried to tighten the valve cover bolts down after the cork gasket was saturated, the oil refused to squeeze out and I warped the valve cover. I have had success in using cork gaskets on valve covers by completely covering the gasket with RTV until absolutely no cork was left visable (360 x 360 covering). I then put a bit of RTV on the thread of the bolts and reassembled the cover. It worked great for many years with no leakage until just recently. I'll be honest, your Autozone gasket may be just fine, or it may leak after 6-months to a year. I'm not sure. Any input from other board members with experince would be appreciated.
Many of the transmission pan gaskets that you'll find on the market are of the crushed-felt or packed fiber type construction. I've had hit and miss results with these over the years when working with other vehicles so now I try to buy rubber tranny pan gaskets whenever possible. (and use RTV on the bolt threads, there's a tiny bit of heat induced expansion and contraction with rubber and you want to avoid having the bolts work their way loose over time.)
Question: "I guess I'm lucky, because I never had any problems with the filler tube nut. But should I redo at year end w/ your recommendations and use the RTV sealant and anti-seize?"
It's your call. If you completely flushed and filled the transmission with a synthetic tranny fluid, (and assuming that the gasket doesn't leak) it may outlast the remaining life of your car (depending on the car's condition). If you find yourself down there to change the gasket in the near future, it wouldn't hurt to use anti-seize on the filler tube nut and some RTV on the bolts.
God bless,
Fitz Fitzgerald.
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'87 Blue 245, NA 220K
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