Here is a lousy pic of the bracket from a 940. IIRC, there is an adapter on the end of the tranny and IIRC the new modern 940 Volvo exhaust pipe has an adapter bracket welded on. It does get in the way of the pan removal (which shouldn’t be often) without Steve’s mod. To drop the pan: support the tranny, remove cross member, remove the exhaust support, reinstall the cross member…
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Tom F. Three 940s. The '93 T-Rex (Regina) is now running very well. Mods, RainX & cup holders. Lien holder on two more (the kid's). Rust In Pieces, '78 245

I was getting a heck of a rattle from the exhaust system of my 1990 740 16v, and had no idea what was causing it ... it was a very loud clanging rattle, usually only on startup or when the engine RPMs were really low, like at idle. Also, it would often set off a good rattling spell when I'd take off from stoplights, etc.

Got up under the car with a rubber mallet and started whacking on various exhaust parts, and tracing down the rattling noise. Discovered that the manifold-to-downpipe connection had gotten a bit loose (held together with 3 flanged nuts on the underside, with a gasket between the parts). The previous owner had apparently lost a couple of the Volvo flanged nuts and had gone back on with regular nuts without the flanges, which loosened over time.

I picked up a couple of used nuts from our local Volvo junkyard, a new gasket, tightened everything up really snug, and no more rattles! You'll need a 15mm socket, a 6" extension, and a U-joint to do this repair, from underneath the car. The nuts are impossible to get a wrench on from the engine compartment side, and you'll need to snake in with a U-joint from underneath to reach the nut closest to the firewall.

Lubed all the nuts with silver Permatex anti-seize grease before reinstalling. 500 miles later, and the exhaust system is quiet as can be.

Hope this helps, good luck!
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R.O.

I installed it on our 90 740.

My assessment is that it's a pretty flimzy bracket, and in my case the reduction in vibrations was minimal at best. It was only on the car a few months and the clamp that secures it to the pipe broke. If I were you, I would get in the car and with it idling in gear (vibrating away), have an assistant push against the exhaust pipe in that area with the end of a 2x4 and see if it smooths out. If you find that it helps much, go have a beefier one fabricated at your local blacksmith.

BTW - I found a greater reduction in idling vibes by removing the vacuum line from the Fuel Pressure Regulator which allows an increase in pressure and a richer idle. I actually drove the car that way and it seemed to run perfectly fine, but I'm afraid to leave it like that as I don't know how much richer it's running that way.

Greg;

I have the same problem in the same area of the exhaust (1st muffler).

Where can I find the full details of this TSB?
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Norm Cook Vancouver BC; 1989 745T 200,000KM

Yes: I did this and it did work on my 1990 745. When you install the bracket, though, make sure you notch it so you can get the pan bolts off without major disassembly later.