My Brumby motor G Box options

revmax · Post by **revmax** » Thu Sep 29, 2011 8:18 pm

the Tyres on the forester were 15" with the EJ box.
As I will be running 13" tyres i think it safer to use the taller ratio EA box. which I think is 3.7:1. (I hope)

Gannon · Post by **Gannon** » Thu Sep 29, 2011 9:34 pm

2.0L Foresters had a lower low range that was pretty similar to the L series one.

YouTube · Post by **El_Freddo** » Fri Sep 30, 2011 7:39 pm

revmax wrote:the Tyres on the forester were 15" with the EJ box.
As I will be running 13" tyres i think it safer to use the taller ratio EA box. which I think is 3.7:1. (I hope)

You're right there, but even with the EA box it'll still be buzzing higher than it does in the foz or liberty. But with the 23 inch stock tyres you're right. One way around this:

3.7 ring and pinion gearset from an EJ gearbox, it'll be directly interchangable and you can use the EA speedo gear to keep your speedo true. Best of every world then! But a few more dollars to get the parts together.
The reason for this setup would be to make the most of the taller 5th gear for lower cruising rpm

Gannon wrote:2.0L Foresters had a lower low range that was pretty similar to the L series one.

Foz is 1.41:1 I think and the L series is 1.59:1

Cheers

Bennie

revmax · Post by **revmax** » Fri Sep 30, 2011 9:27 pm

Bernie, it is going to take some time to "Sink in" what you are saying. To be honest I think I will have pull a gearbox appart to have some understanding of what you are saying.

revmax · Post by **revmax** » Fri Sep 30, 2011 9:30 pm

Hey Bernie.
Any chance you could make the photo in your sig narrower cause it is causing the text in your posts to be cropped on the right hand side.

YouTube · Post by **El_Freddo** » Fri Sep 30, 2011 10:32 pm

revmax wrote:Bernie, it is going to take some time to "Sink in" what you are saying. To be honest I think I will have pull a gearbox appart to have some understanding of what you are saying.

I realise this is the case. This is what the internals of the 5 speed gearbox looks like, it's basically the same between the EA and EJ gearboxes with the main difference being the pinion shafts, there are other minor differences if you start swapping 5th between gearboxes as I don't think this will work. Here's an EA dual range 5 speed, note the gear on the bottom shaft (pinion) at the left of the picture:

And here's an EJ dual range 5 speed, note the lack of the gear in the left of the pic, rather two short splined shafts where the centre diff mounts:

As you can see they look the same. But there are differences such as gear ratios and the pinion shaft between the two gearboxes.

Now if you got a foz (EJ AWD dual range gearbox) and a 3.7 ratio liberty gearbox (Gen2 I think), you can take the 3.7 ring and pinion gear from the liberty gearbox and put it into the foz box without too much trouble. The real technical bit is getting the diff preload etc sorted, but a gearbox place should be able to do this bit of work for you easily enough. Advantage of all this work? Well you get the foz low range and a diff ratio that will match the gearing to the tyre size to keep the revs vs speed as they were in the foz with the factory foz wheels. Clear as mud?

revmax wrote:Any chance you could make the photo in your sig narrower cause it is causing the text in your posts to be cropped on the right hand side.

Hmmm. I've not got his problem - I've got a 15 inch screen and it well and truly fits without issue. I also use the VB style - this can be selected in the bottom left of the forum

I worked on this pic for a long time

Cheers

Bennie

revmax · Post by **revmax** » Sat Oct 01, 2011 6:00 am

AHHHH , "sinking in " now thanks Bennie.

Got the "VB" now and everything is in view.

FROG · Post by **FROG** » Sat Oct 01, 2011 8:06 am

El_Freddo wrote:You're right there, but even with the EA box it'll still be buzzing higher than it does in the foz or liberty. But with the 23 inch stock tyres you're right. One way around this:

3.7 ring and pinion gearset from an EJ gearbox, it'll be directly interchangable and you can use the EA speedo gear to keep your speedo true. Best of every world then! But a few more dollars to get the parts together.
The reason for this setup would be to make the most of the taller 5th gear for lower cruising rpm

Foz is 1.41:1 I think and the L series is 1.59:1

Cheers

Bennie

Tazas signature says 1.447 low in case it matters
2001 Forester Limited 2.0L
65mm lift, 1.447 low range, AT-S""
1.59:1 sounds right though

steptoe · Post by **steptoe** » Sat Oct 01, 2011 8:42 am

Question: where does the liquid nails come into use?

YouTube · Post by **El_Freddo** » Tue Oct 04, 2011 11:12 am

FROG wrote:Tazas signature says 1.447 low in case it matters

Thanks Andy, I couldn't remember what it was after 1.4x, glad you made a correction.

steptoe wrote:Question: where does the liquid nails come into use?

Odd jobs around the home. I've also heard it's good for gluing smart arses to the wall to keep them off the internet

Jokes. Seriously though it just happened to be on the bench and sneak into the photo...

Cheers

Bennie

revmax · Post by **revmax** » Wed Oct 26, 2011 6:22 am

I have just realised the output splines on the EA82 box are different to the ones one the EA81 box.
Does this mean I will have to take the ends of the EA82 CV shafts and fit them to the EA81 CV shafts. If this is possible.