center diff, under the engine. i think R&P is $900 + the build/upgrades/s&h etc but depending on how much got in between the teeth, the housing parts might be out of spec and add to the total. you'll probably want the uprated R&P from shep/TRE

you need to drain the oil first (measure how much you had left) and you might see some shrapnel there, but the big chunks will end up by the inspection plate.

 

I’ve read that diaqueen is the only oil that should be used. Had a quick look on eBay and there seems to be quite a few variations of it. Ideally needs to be available in the uk, if anybody knows where I can get it from?

cheerd

 

There are other lubes that work as well. Many of us including myself have always used: Redline Heavy Shockproof in the T-case

 

"diaqueen" SAE 90 if you have LSD (i have no idea what evo8 has/needs). I use Redline 75w90 on my evo9 and i think its also available in the UK

 

Yea I had a friend with the same issue. He replaced the transfercase with a used one and it fixed the problem.

A new ring and pinion costs the same as a used transfercase but few people know how to properly install those parts.

 

Hi

Ive removed that inspection plate today and it all looks good.

I’ve jacked up the back end, and rotated the wheels whilst under the diff. All I can hear is this noise coming from the diff. Any ideas?

cheers

Video

 

Something sounds locked up for sure. Cant be too tough to dis-connect the driveline to the rear diff just to eliminate the rear diff as the problem (unless you somehow know its either TC or the Trans)

Just a thought

 

hmm are you sure handbrake is disengaged? might as well disconnect the driveshaft by the rear diff and see if you can spin the wheels. make sure you mark the flanges

 

I removed both rear discs and the handbrake mechanism appears all in order. The wheels do rotate when in the air, with difficulty. But when on the ground nothing. So assume from that it can’t be the handbrake. .

cheers

 

ok i was checking, trying to figure out that sound in the video. my rear diff has a clunk when turning the wheels manually - i think thats normal. wonder if its your hub bearings - thats loaded when the car is on the ground. I have no experience with bad hub bearings tho.
I went thru the same chasing last year. (before inspecting my front diff I was so sure i feel stoppage in the rear) while under the car I could turn my driveshaft up to the point of stoppage. but still couldnt figure out if its in the front or rear, so I disconnected the rear flange. tested no stoppage from the rear. spun the rest of the driveshaft (you can also remove the front section) and got the stoppage. Maybe you can spin and inspect every tooth of your front R&P if thats the case for you

 

Whenever a drivetrain issue arises, it's also good to drain and inspect all drivetrain fluids. Since our cars are AWD, it's hard to diagnose the problem quickly due to the rear diff being coupled to the transfer case. It would be odd, but not impossible if your rear differential is locked up due to a failed ring/pinion.

 

Found the issue. Rear diff had destroyed itself. All other components were fine thankfully.

took the inspection plate of and lots of metal fell out.

I’ve now sourced a second hand diff and changing all the oils.

hopefully all will be back together in the new year. Thanks guys