Volvo RWD 700 Forum

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vibration at idle, temperature gauge 700 1989

I recently bought a 1989 740 GL with 50K miles from an elderly friend of my mothers. It is in very good condition but I have two minor problems. The temperature gauge is erratic. Sometimes is will start to rise appropriately when the engine is started but then drop back to zero. I suspect a poor contact somewhere. Any advice on what should be checked?

Also,the car runs very smoothly when driving and shifts correctly (AW70 transmission with O/D) but when I stop at a light and leave the car in drive, there is an excessive amount of vibration resulting in rattles. If I shift into neutral the vibration stops and resulting rattles stop. The idle seems appropriate - approx 800 rpm showing on the tach. The only thing I can think of is tired motor or transmission mounts. Any ideas?

This is my first message in this forum. I am a longstanding fan of Volvos having bought my first 544 in 1963. Since then I have had another 544, an 1800 ES, a 122S bought new and a 240 wagon bought new. This 1989 740 pretty well rounds out all the post-war RWDs for me. Unfortunately the newer FWDs have moved into a luxury bracket beyond my means. I have enjoyed the good information I have found on the Brickboard - thanks for the service.








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vibration at idle, temperature gauge 700 1989

Answer received. Thanks to Randy for sending me Volvo Service Bulletin which provides the solution to the vibration problem.








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vibration at idle, temperature gauge 700 1989

Sounds like a problem I have. What did the Service Bulletin recommend? Thanks!!








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vibration at idle, temperature gauge 700 1989

It was Volvo service bulletin Model 700-900, Group 25, Number 709. It called for mounting a bracket between the rear of the transmission and the exhaust pipe. It was emailed to me by a reader of the brickboard. If I can find your email I will forward it on. Parker








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vibration at idle, temperature gauge 700 1989

Thanks. Actually I've seen this bulletin and added the brace with some improvement, but I still have some considerable vibration.








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vibration at idle, temperature gauge 700 1989

Could I get a copy of the bulliten forwarded my way? rockjurai@hotmail.com


Thanks!








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vibration at idle, temperature gauge 700 1989

I would be happy to but due to a fault in my software I can't access my email starting from the Web (so I can't click on the envelop in your profile to send a message). A fellow named Randy sent me the service bulletin. Sorry Parker








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vibration at idle, temperature gauge 700 1989

dont u need a 940 to complete the set...lol







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