How hard is changing diff? I have spare one, and i suspect mine makes too bad noise...how hard it will be ? Steps ?

thanks

 

please answer ;o)

 

Easy and Hard is subjective.
Nothing on RX-7's is too hard. Just take your time, drop the rear end, and unbolt the diff. Not mind boggling or anything. IMO, easier than a clutch change (unless you have a tranny jack... man those things are great!)
You might wanna wait until you get your ES bushings and do it all then, and I suggest changing the front diff mount to a comp. one while your at it.

Sean Cathcart

 

i have kinda new diff mount, haven`t ordered bushings yet and need change diff quickly now...i will put Torsen or KAAZ in that one diff housing i will remove now, but for now i need something what makes little bit less noise...i have spare TII diff sitting in my parts car...
its my only car and i don`t want to break it completely

 

what everything to unbolt ? whole rear frame ?

 

You will need to unbolt the drive shaft from the diff, unbolt the half shaft axles and the two bolts that hold the diff casing to the frame and the two small bolts on top and you will need to take out the bolt on the left side of the the rear frame assembley. This will; make the diff easier to remove from the car.

 

Christ, easy there tiger.

Ok, to replace the diff, and I may miss a few steps, so don't bite my head off.

- Remove exhaust from cat back.
- Disconnect driveshaft from rear diff flange (probably don't need to remove the heat shields, but if you do, you do)
- unbolt the 4 nuts on each side holding the axles to the diff, and move out of the way (may need to remove the 32mm axle nut on the other end, not sure)
- get a jack up under the front of the subframe, lower the front of the subframe to get at the two nuts holding the front diff mount on. Remove those.
- Get another jack under the pumpkin, then remove the two 21mm nuts holding the two rear diff mounts up.
- Lower the diff carefully, you'll have to untangle it from the front subframe mount before it will come loose.

Now that I've said that, it's easier to just unbolt the front subframe, and drop it too. Kinda tight quarters in there with the front diff mount, and you've already done most of the work anyway. Just add disconnecting the rear swaybar and two brake calipers, and leave the axles alone until it's dropped.

Now, never having removed the axles, I don't know if you need to remove the hubs to give the axles room to disco from the differential. If so, then add that to the list.

Have fun. It's not too bad, but you need a few jacks, and some uncommon sockets (21mm, 32mm maybe)

PaulC

 

Just did this a couple of weeks ago. I spent hours trying to get at the front diff mount. No room to work. Much easier to drop the whole subframe.

 

when dropping whole subframe, wheels with struts still stay on car or goes down with subframe ?

 

struts come off at the control arm, you can remove entirely, or just slip them to the side, your choice.

Wheels come off.