Question about 1986 Volvo 740
If you can, put an OBDII scan tool on it and look for codes in the P0730 range (incorrect gear ratio). Any P07XX code is a transaxle code. Alternatively, check that your shift lever is adjusted properly. Sometimes it may seem correct but since there are switches there it is possible that they are not making content in D.
The other possibilities are low line pressure (check/change the transaxle oil), low oil level (do not overfill, it may damage your newly-installed transaxle or cause fluid to be ejected out of the fill tube), valve body problems or sensors. Got a MIL lit? That's a sure bet there's something the computer wants to tell you about.
Posted on Nov 08, 2013
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Posted on Jan 02, 2017
has he tried to replace the b4 servo cover and the seloniods volvo has a lot of problems with those and they have computer reprograms also
Posted on Nov 12, 2008
Sounds as if a synchronizer is going out in 3rd gear, or 3rd gear maybe stripped. I would get it checked by a tranny (transmission) shop before it ended up costing you more money. There is a possibility that there may be some shavings on that gear as well, which would just need cleaned.
Posted on Jan 11, 2009
I would lean toward the MAF sensor they were known for going bad, which would cause all these codes. It wouldn't hurt to take the IAC off and spray it out with carb cleaner and some WD40, just to cover your bases. Both these units were made by Bosch and the MAF failed alot more often then the IAC.
Posted on May 23, 2009
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