Not Holding The Revs Through The Gears

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Not Holding The Revs Through The Gears; Stretched bowden cable, perhaps?
Topic Started: Mon Nov 26, 2007 2:55 pm (189 Views)
Conrad	Mon Nov 26, 2007 2:55 pm Post #1
Gunman of the apocalypse Posts: 5,512 Group: Members Member #34 Joined: November 11, 2005	Hello! I'm nearing completion with the 2.5 but this one has me stumped... I still have no kickdown, but I'm not worried about that at the moment, now my issue is this: Previously, when everything was working perfectly, more accelerator pedal = higher revs before gear change (it's an auto). But now, when I give it some, it still changes at 3000rpm irrespective how much pressure I'm putting on the pedal! I've pulled the bowden cable out all the way, but that hasn't made a difference. I know the cable itself is very stretched, so could it be that it's beyond the threshold and is now not putting any real pressure on the gearbox? As I said, it was working perfectly before the engine swap, but it has been standing for a year and until recently hadn't been driven. I've obviously flushed all the fluid and replaced the filter, but now I'm a bit stuck. Could it be related to no kickdown? I know the kickdown wire isn't plugged into the solenoid at the moment due to the end connector being torn off, but I have yet to address that issue. Thanks for any help, these auto boxes are beyond me.



Conrad	Tue Nov 27, 2007 11:14 am Post #2
Gunman of the apocalypse Posts: 5,512 Group: Members Member #34 Joined: November 11, 2005	Come on chaps, someone must know?



Big Ben	Tue Nov 27, 2007 11:27 am Post #3
Sneaky 2.5-16 Driver! Posts: 5,126 Group: Members Member #155 Joined: January 26, 2006 Colour / Year / Engine Guards Red/1985/2ltr	It certainly could be the cable. I disconnected mine to see what would happen and it did exactly what you are describing. It would cause problems with the kickdown as it senses the throttle position. Throttle position, kickdown switch and RPM (by internal pressure/flow) are what the gearbox normally senses so it can do its job. That is about all I know mate. I usually send mine away to be set up!



RobertE	Tue Nov 27, 2007 11:39 am Post #4
Serial victim... Posts: 7,529 Group: Members Member #1,403 Joined: June 13, 2007	I know F'all about automatic transmisions, and consider them to be devices of Beelzebub, but is there a sport/economy setting on the cossie version? If there is, maybe it's short-shifting in economy mode... Sorry not to be more helpful



Racing	Tue Nov 27, 2007 6:21 pm Post #5
Member Posts: 789 Group: Members Member #384 Joined: July 1, 2006	You�re correct Robert. Conrad. Also check the adjustment/tension of the gearbox wire when you with the motor shut off go WOT. There�s various setups of box wires...and therefore you need to describe it. Most likely it�s a plastic end with a "knurled" plastic nut on it? If so,the "freeplay" should be approx 1mm at the wire end at WOT. (That wire also has a "harmonica" rubber seal on it-normaly red to the colour if memory serves me)



Conrad	Tue Nov 27, 2007 7:33 pm Post #6
Gunman of the apocalypse Posts: 5,512 Group: Members Member #34 Joined: November 11, 2005	Thanks chaps. Yes, it has a plastic knurled end. I twisted this so it's right out at full, at WOT it's holding very tight. I'll see if I can get a photo tomorrow, unfortunately I only get home after it's dark so it'll probably be first thing in the morning. I tried wiggling the economy switch, but maybe it's broken? Will take it off and have a look this weekend. Keep 'em coming, and thanks!



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