gearbox issue

yargnitram · 5th January 2019, 08:42

car is 1999 2.5 v6 auto,last week the gearbox started acting up would not change from first to second before it hit about 5000rpm then when in with a bang second to third was less harsh but still not good,reverse is perfect,i changed 4 out of the six solenoids gearbox is a little better but still refuses to change from 1-2 before it hits 5000 rpm but the loud bang has mainly gone when it has done the first changed from start up it does get better but sometimes locks the front wheels when coming to a halt,i am going to change the last of the solenoids and hope this cures the issue any ideas would be welcome

gadget1960 · 5th January 2019, 09:25

Hi, I had a similar issue with a Volvo 740 a while back, turned out the box had some crud floating around in it and was partially blocking one of the oilways, (looked like part of an old gasket but couldn't be sure) on investigation I also found the filter was well past it's best so changed it and put new oil in and hey presto .... better but not gone!? also turned out the V6 has a very slight mis-fire under acceleration so the box wasn't getting the torque it needed to change up when needed, traced that to a suspect plug lead so changed that and ... problem solved.
Up until all this work was done, it used to have the same violent second gear change up so hopefully your problem might be as easy to sort out.

5th January 2019, 08:42	#1
yargnitram Regular poster Rover 75 Join Date: Aug 2012 Location: Auckland Posts: 44 Thanks: 9 Thanked 4 Times in 4 Posts	gearbox issue car is 1999 2.5 v6 auto,last week the gearbox started acting up would not change from first to second before it hit about 5000rpm then when in with a bang second to third was less harsh but still not good,reverse is perfect,i changed 4 out of the six solenoids gearbox is a little better but still refuses to change from 1-2 before it hits 5000 rpm but the loud bang has mainly gone when it has done the first changed from start up it does get better but sometimes locks the front wheels when coming to a halt,i am going to change the last of the solenoids and hope this cures the issue any ideas would be welcome

5th January 2019, 09:25	#2
gadget1960 Gets stuck in Rover 75 saloon Join Date: Dec 2018 Location: Maxton, Dover Posts: 519 Thanks: 183 Thanked 132 Times in 89 Posts	Hi, I had a similar issue with a Volvo 740 a while back, turned out the box had some crud floating around in it and was partially blocking one of the oilways, (looked like part of an old gasket but couldn't be sure) on investigation I also found the filter was well past it's best so changed it and put new oil in and hey presto .... better but not gone!? also turned out the V6 has a very slight mis-fire under acceleration so the box wasn't getting the torque it needed to change up when needed, traced that to a suspect plug lead so changed that and ... problem solved. Up until all this work was done, it used to have the same violent second gear change up so hopefully your problem might be as easy to sort out.