centre diff/transfer case

AlpineRaven · Post by **AlpineRaven** » Tue Mar 24, 2009 2:29 pm

has anyone here worked on an transfer case/centre diff on AWD gearbox? Are there replaceble parts that can be done? I have one gear box with blown transfer case and planning to open up one day to see if can be fixed or better get the whole transfer case off a wrecker?
Cheers
AP

AlpineRaven · Post by **AlpineRaven** » Tue Mar 24, 2009 2:33 pm

oh another question.. Is single range and dual range's transfer case both the same?
Cheers
AP

AndrewT · Post by **AndrewT** » Tue Mar 24, 2009 3:59 pm

Yeah you can just unbolt the rear of the gearbox and replace it with another one. From what I hear it is quite a straightforward job which can even be done with the gearbox still in the car, I have not had the opportunity/need to try it myself tho. I think the housings may differ somewhat between dual or single range models.

AlpineRaven · Post by **AlpineRaven** » Wed Mar 25, 2009 9:26 pm

AndrewT wrote:Yeah you can just unbolt the rear of the gearbox and replace it with another one. From what I hear it is quite a straightforward job which can even be done with the gearbox still in the car, I have not had the opportunity/need to try it myself tho. I think the housings may differ somewhat between dual or single range models.

This has gotten me thinking tonight, I think it would be hard if the gearbox was still attached on the car, there is one selector on the gearstick shaft, there is a 10mm bolt attached, you need to access from top cover of the gearbox, if it was on the car it would be nearly impossible unless you know where things are in blind eye!
If it was AWD transfer case its lot easier to remove than L series D/R transfer case as there is more work there due the selector section.
Cheers
AP

AndrewT · Post by **AndrewT** » Thu Mar 26, 2009 9:18 am

Well there person who was telling me must have made the whole thing up. Although he does strip down gearboxes all the time - he likely does know where things are without looking :P That's DTrally from the RSlibertyclub.org forums.
Actually come to think of it I have seen Oversteer do it to a wrx awd gearbox that was in an L series, he just dropped the rear crossmember and lowered the back of the gearbox down about an inch to get better access.

Phizinza · Post by **Phizinza** » Thu Mar 26, 2009 9:50 am

SR and DR rear casings are different. The shifter assembly in them is different because the SR has no rod going to above the front diff for the low range. You can defiantly not pull it off "easily" or while its still in the car. The 4wd shifter assembly is quite tricky with several detent balls and springs.

You could probably use the gears from the SR in the DR box though.

AWD EJ boxes are different. There is no 4wd shifter stuff to deal with and they come apart pretty easy.

AlpineRaven · Post by **AlpineRaven** » Thu Mar 26, 2009 7:40 pm

Phizinza wrote:SR and DR rear casings are different. The shifter assembly in them is different because the SR has no rod going to above the front diff for the low range. You can defiantly not pull it off "easily" or while its still in the car. The 4wd shifter assembly is quite tricky with several detent balls and springs.

You could probably use the gears from the SR in the DR box though.

AWD EJ boxes are different. There is no 4wd shifter stuff to deal with and they come apart pretty easy.

Thats right there isnt one in the transfer case, its pretty straightforward to pull it out, just undo the rear cover, then the shaft will pop out, then undo 10mm bolt on the selector shaft, then undo all bolts on the transfer case and whole thing comes out... pretty much all
Cheers
AP

mattl200 · Post by **mattl200** » Thu Mar 26, 2009 9:47 pm

EJ rear housings are the same for sr\dr only the front caseings change

Phizinza · Post by **Phizinza** » Thu Mar 26, 2009 9:48 pm

To me, the term 'Transfer Case' means a attachment either bolted to or linked to the gearbox which has selectable transfer of power. As in 2WD or 4WD. I wouldn't call the EJ's centre diff housing a "Transfer Case". So that will hopefully explain my previous thread more.

Subaman · Post by **Subaman** » Fri Mar 27, 2009 7:14 am

http://en.wikipedia.org/wiki/Transfer_case

mattl200 · Post by **mattl200** » Thu Apr 02, 2009 9:04 pm

AlpineRaven wrote:This has gotten me thinking tonight, I think it would be hard if the gearbox was still attached on the car, there is one selector on the gearstick shaft, there is a 10mm bolt attached, you need to access from top cover of the gearbox, if it was on the car it would be nearly impossible unless you know where things are in blind eye!
If it was AWD transfer case its lot easier to remove than L series D/R transfer case as there is more work there due the selector section.
Cheers
AP

looked at this the other day and if u remove the pin and t peice from the end of the shifter shaft and unbolt the very rear housing of an ej box u can remove the centre diff and not worry about that 10mm locking bolt