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4GEN Liberty 6 speed into 3GEN Liberty B4


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#1 LukeFranky

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Posted 20 February 2018 - 01:47 PM

EDIT: 5GEN Liberty 6 speed, not 4GEN.

 

Any one know what would be required to make a 5GEN Liberty 6 speed fit into a 3GEN Liberty B4?

 

Looks the front drive shafts might be different, how can that be resolved? What about the tailshaft and mounting? Anything else to watch out for?

 

Am I correct in saying the 6 speed Liberty boxes are stronger than the 5 speeds right?


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#2 Barbbachello

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Posted 20 February 2018 - 01:54 PM

5th gen boxes are rubbish. Same as a 5 speed just with an extra gear


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#3 LukeFranky

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Posted 20 February 2018 - 03:53 PM

Ah damn. 4th GEN ones better?


The B4 Bomber - 2002 MY03 Subaru Liberty B4, ADM, Manual, EJ208. 


#4 Barbbachello

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Posted 20 February 2018 - 05:16 PM

Ah damn. 4th GEN ones better?

4th gen is the same as STi just no DCCD or front LSD. Same strength and goodness though


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#5 applegeek897

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Posted 20 February 2018 - 08:12 PM

I believe it will mostly bolt in, of course you'll need the 6-speed specific clutch and fly, including starter. Tailshaft is different. Cheap option would be to get an auto one as I believe they are the same for the 6-speed.


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#6 Barbbachello

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Posted 21 February 2018 - 07:14 AM

I believe it will mostly bolt in, of course you'll need the 6-speed specific clutch and fly, including starter. Tailshaft is different. Cheap option would be to get an auto one as I believe they are the same for the 6-speed.

Idk about the newer ones, but for the STi/Gen 4 box you can use a 5 speed clutch, flywheel and starter but have to use the 6 speed fork. The proper STi tailshaft is a bit stronger but has the same length and spline as the auto shaft and seeing as the GD tail shaft doesnt fit other cars the auto one is good enough


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#7 LukeFranky

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Posted 21 February 2018 - 09:30 AM

Keep breaking 5 speeds. Admittedly I thrash them on tight tracks.

 

4GEN Liberty 6 speed sounds good. I had come across a cheap 5GEN one but would be pointless upgrading to that.

 

Thanks guys.


The B4 Bomber - 2002 MY03 Subaru Liberty B4, ADM, Manual, EJ208. 


#8 Barbbachello

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Posted 21 February 2018 - 10:04 AM

Keep breaking 5 speeds. Admittedly I thrash them on tight tracks.

 

4GEN Liberty 6 speed sounds good. I had come across a cheap 5GEN one but would be pointless upgrading to that.

 

Thanks guys.

Unless you find a bargain 4th gen box get an STi one. LSD/DCCD and speedo drive makes them worth holding out for if you can


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#9 LukeFranky

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Posted 21 February 2018 - 10:53 AM

STi 6 speeds appear to cost a fortune. As far as I can tell, there would be no change left from a good 5-6k.


The B4 Bomber - 2002 MY03 Subaru Liberty B4, ADM, Manual, EJ208. 


#10 Barbbachello

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Posted 21 February 2018 - 02:57 PM

STi 6 speeds appear to cost a fortune. As far as I can tell, there would be no change left from a good 5-6k.

Should be able to find a box by itself for around 3k. The cheap way of doing it is

5 speed clutch,
R160 to match 6 speed. 
Auto tail shaft
6 speed box mount in your crossmember

Only STi part you need to have is the shifter


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#11 LukeFranky

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Posted 21 February 2018 - 03:30 PM

Interesting.

 

I haven't seen any cheap 6 speeds, but I haven't look properly for a while.

 

What about the front drive shafts? Nothing different there? I recall something about this.

'6 speed box mount in your crossmember', can you go into further detail?


The B4 Bomber - 2002 MY03 Subaru Liberty B4, ADM, Manual, EJ208. 


#12 Barbbachello

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Posted 21 February 2018 - 05:28 PM

Interesting.

 

I haven't seen any cheap 6 speeds, but I haven't look properly for a while.

 

What about the front drive shafts? Nothing different there? I recall something about this.

'6 speed box mount in your crossmember', can you go into further detail?

If you get a early box they have the same male stubs as your current box. Around 05 they went to male shafts so you can use the stubs and oil seals from an auto to convert them back to use your stock shafts.

The 6 speed uses a different rubber mount in the crossmember to the 5 speed but they swap over 


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#13 LukeFranky

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Posted 22 February 2018 - 10:27 AM

Hmm, I can get a GDB 6 speed box with about 130,000km on it, and a matching r180 diff for about $3700 delivered. Does that seem reasonable?

 

Only other part I'd need to source would be the auto tailshaft. Can this come out of any 3GEN liberty?


The B4 Bomber - 2002 MY03 Subaru Liberty B4, ADM, Manual, EJ208. 


#14 Barbbachello

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Posted 22 February 2018 - 10:48 AM

Hmm, I can get a GDB 6 speed box with about 130,000km on it, and a matching r180 diff for about $3700 delivered. Does that seem reasonable?

 

Only other part I'd need to source would be the auto tailshaft. Can this come out of any 3GEN liberty?

Thats a great deal but keep in mine R180 gen 3 is pretty involved. Need to get custom hubs made up from a donor set of GD R180 hubs and some machining magic. Maybe offer 3k without the diff and just keep the R160

Yeah any auto shaft works


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#15 LukeFranky

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Posted 22 February 2018 - 10:59 AM

Cant make it fit with hybrid rear shafts?


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#16 Barbbachello

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Posted 22 February 2018 - 11:21 AM

Cant make it fit with hybrid rear shafts?

Thats also an option using but youll need a donor set of R180 shafts. If youre not snapping shafts from power and dont need a mechanical diff, R180 isnt overly needed


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#17 LukeFranky

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Posted 22 February 2018 - 11:47 AM

Yeah, only breaking 5 speeds. Bought the 6 speed. Now to find auto shaft and 3.9 ratio rear diff.

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#18 El_Freddo

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Posted 22 February 2018 - 11:49 AM

5th gen boxes are rubbish. Same as a 5 speed just with an extra gear


Interesting. Anyone know if it's the same setup as the 5 speed in terms of front cases etc?

It's got me thinking about whether I could add a 6th gear to my off-roader - cruise in 6th with light loads and 5th when loaded...

Anyone got any pics of internals for the gen5 and gen4 6 speed boxes?

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#19 Barbbachello

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Posted 22 February 2018 - 12:25 PM

Yeah, only breaking 5 speeds. Bought the 6 speed. Now to find auto shaft and 3.9 ratio rear diff.

Double check its actually a 3.9. It could be a 3.9 with the 1.1:1 drop gear meaning you need a 3.54 rear diff


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#20 LukeFranky

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Posted 22 February 2018 - 12:35 PM

Thanks for the heads up.

 

According to this http://www.gearhack....nsmission Chart the TY856WB1CA has a 3.9 final ratio.


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