Bombsquad Posted January 8, 2012 Share Posted January 8, 2012 Hey lads, just a question about auto transmissions. Got a v8 soarer which is slowly being swapped to manual, but as i have a heap of other projects its very slow going. Is there a way to crank up the line pressure or whatever you do to the auto boxs to make it a bit more fun to drive?? Quote Link to comment Share on other sites More sharing options...
Jase Posted January 8, 2012 Share Posted January 8, 2012 they're electronically controlled shift points etc aren't they, diddy will know, camels manual jz one was quite choice tbh Quote Link to comment Share on other sites More sharing options...
Yowzer Posted January 8, 2012 Share Posted January 8, 2012 The line pressure is still controlled by the kickdown, so you can just lock that on full on. To speed up shifts etc read this stz http://www.supraforums.com/forum/showth ... take-a-nap) Quote Link to comment Share on other sites More sharing options...
Bombsquad Posted January 8, 2012 Author Share Posted January 8, 2012 I know jack all about autos, I thought the line pressure slowed the shift if it was wound up (eg would rev out higher before changing). Mine is v8, not Jz sadly. Still fun for skids and sounds choice hitting limiter Quote Link to comment Share on other sites More sharing options...
flyingbrick Posted January 8, 2012 Share Posted January 8, 2012 line pressure makes the disks clamp together harder and faster. Modern boxes have variable line pressure for comfort reasons- at low throttle with high line pressure the box will slam from gear to gear. This is not bad for the box as its preventing clutch slip and clutch slip is bad for a few reasons. There is a website somewhere showing how to pull the soarer auto valve body out and shim/plug the accumulators (like a piston with a spring behind it which removes spikes in the fluid pressure)and also how to raise the line pressure by drilling holes and shimming regulators. I suggest google. Quote Link to comment Share on other sites More sharing options...
Bombsquad Posted January 8, 2012 Author Share Posted January 8, 2012 Cheers flyingbrick, all sounds like too much effort though seeing im planing to ditch the auto in a month or two. I thought there might be some kind of easier external option. Quote Link to comment Share on other sites More sharing options...
Yowzer Posted January 8, 2012 Share Posted January 8, 2012 There is a website somewhere showing how to pull the soarer auto valve body out and shim/plug the accumulators (like a piston with a spring behind it which removes spikes in the fluid pressure)and also how to raise the line pressure by drilling holes and shimming regulators. I suggest google. http://www.supraforums.com/forum/showth ... take-a-nap) Older mechanical boxes use the kickdown to tell the box when to downshift under heavy throttle. The a340e is all electronically controlled and the kickdown only controls the line pressure. The later model boxes (a350e?) used behind the series 2 1UZs are electronically controlled line pressure and run no kickdown cable at all. Quote Link to comment Share on other sites More sharing options...
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