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Auto Gearbox Differences EB 3.9 EF to AU 

 

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 Post subject: Auto Gearbox Differences EB 3.9 EF to AU
Posted: Thu Mar 15, 2007 8:46 pm 
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What is the diferences between the models from the first BTR 4 speed up til the AU BTR...... i can't score a normal EB 3.9 auto in dubbo but there is plenty of ef and au ones so could some one explain the differences...

 

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Posted: Thu Mar 15, 2007 8:50 pm 
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Get an ef one, it still has a dipstick.

au ones dont have dipsticks.
they should go in without any problems at all..

hey I am using a manual 88 model EA wagon 5 speed box in my EF.... 94 model.

I have heard lots of things about small differences in power handling, but this is yet to be seen as they all appear to be able to take a fair bit of abuse so long as the heat doesn't get to them.

later generally would be the better transmission, however having no dipstick would be a pain in the bum

ef series 2 onwards they deleted the stick.

 

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Posted: Thu Mar 15, 2007 8:55 pm 
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so no real differences elec wise???? cause late ED deleted the tcm computer so the 3,9 eb has a tcm so are all the plugs the same etc

 

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Posted: Thu Mar 15, 2007 9:14 pm 
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yeah i think they were. i had to butcher some of the wiring harnesses from my ef auto loom to hook into the manual loom, and the plugs were the same in my box as some of the other ones i have seen.

I would think they are the same, but just for your peace of mind, poke your head under your car and if it has

1 square plug with 4 wires on it hooked onto the transmission position sensor

1 round plug with something like 7 wires in it (guessing on the wire amount)
controls the gearboxes solenoids and the temp sender to the pcm
then they are the same..

 

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Posted: Thu Mar 15, 2007 9:17 pm 
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oh and my EA 30th anniversary 4 speed had an eb2 wagons 4 speed in it.
so yeah they must be at least similar. :)

 

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Posted: Thu Mar 15, 2007 9:35 pm 
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yeah cheers i got to get underneath my car and have a look i am sure ther wouldnt be a drama bolting it up.

 

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Posted: Thu Mar 15, 2007 10:51 pm 
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AU BTR is by far the best. Anyone who has driven an AU will know what i am talking about.

EA-ED are the same. EF and EL marginally better. I have heard stories about the EA-ED box being a bit stronger. Don't quote me on that though

 

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Posted: Thu Mar 15, 2007 11:28 pm 
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they are all the same basic box but there were quite a few internal changes that were made with each model. I have the factory BTR manual if you are really interested but it is a boring read.

Most of the difference you feel is the electronic tuning side of things. While AU's might "feel" better, put an EA box in and connect it to the AU computer and it will feel the same.

 

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Posted: Mon Mar 19, 2007 9:46 pm 
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so plug wise are the plugs the same as in if i purchase an ef/el/au one it will bolt up and plug in like if i got a replacement eb 3.9 one.=

 

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Posted: Mon Mar 19, 2007 9:58 pm 
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Froudey wrote:
so plug wise are the plugs the same as in if i purchase an ef/el/au one it will bolt up and plug in like if i got a replacement eb 3.9 one.=


They have different solenoids, and the extension housing is different too.

 

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Posted: Mon Mar 19, 2007 10:11 pm 
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the extention housing is the same dude. i have changed the extention housing on my ef over with an ea one, and put an xf tailshaft in the ea.
the diff where the tailshaft bolts onto it is different after the eb series 1 but the tailshaft yolke will fit into the back of all of those gearboxes. hence the fact I am running an EA T5 in my ef with the original ef tailshaft.
:)

 

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Posted: Mon Mar 19, 2007 10:18 pm 
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The extension housing on an AU is diferent to previous models.

 

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Posted: Mon Mar 19, 2007 10:27 pm 
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thank you for clearing that one up :D!

 

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Posted: Mon Mar 19, 2007 10:30 pm 
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I think I have an extention housing from the earlier models in the garage somewhere. did you want to post a pic of the au one up in here and if I can find mine, then same thing.
do you know if the yolke on the au tailshaft is the same as the earlier btr gearboxes?

 

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Posted: Mon Mar 19, 2007 11:05 pm 
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Yeah, same yoke. I'll have to take the camera to work and hope an AU comes in. Had an AUII in today.....bugger..............and on the hoist too....
On my hoist now is an old 85 Jackaroo piece of crap................the old " Please sir, turn my piece of sh!t in to Strawberry jam".....aaahhhhhh!!!
Thats another story.

 

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