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on Gas and auto not changing??? 


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 Post subject: on Gas and auto not changing???
Posted: Sat Aug 13, 2005 4:52 pm 
Parts Gopher

Posts: 64

Joined: 5th Dec 2004


Location: adelaide
SA, Australia

hey fellas
on pedie the fairmont changes perfect but when i switch to gas i can rev the b**ch out she wont change unless i back right off
any ideas???
Posted: Sat Aug 13, 2005 11:04 pm 
Getting Side Ways

Age: 36

Posts: 9453

Joined: 9th Nov 2004

Gallery: 4 images

Ride: Fordrunner 5.0 Turbo

Location: Wollongong
NSW, Australia

Is it a factory gas install?

On the factory duel fuel cars they have 2 transmission maps. The petrol one is much more agressive than the lpg one. Not so much in the shift points but in the firmness of the shifts (more line pressure). I can barely feel my AU shift when I'm driving it around on gas but on petrol I can feel every gear shift.

If its a bit worn and starting to slip then chances are that's what the problem is. Not enough line pressure to engage a shift and the car just revs right out. Now you can be a bodgy C*** about this of fair dinkum. The bodgy way is to install a shift kit on an almost dead gearbox and the fair dinkum way is to get your gearbox checked out and possibly rebuilt.
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