Toyota Corolla DIY

This is one of three ways to install an LSD into a C(56,59,60,64) series transmission. This is the quickest and easiest way to install an LSD, but is considered by some to be the least reliable method because of the lack of bearing pre-load testing. Improper bearing pre-load can lead to premature transmission failure. Just a warning.

I will be diving into other installation techniques(including the one Toyota recommends) at a later date.

I ordered the JDM Toyota LSD from MWR along with the install kit that includes two bearing and two seals. I DO NOT recommend the use of this method to install an OBX or MWR LSD.

Things you will need:

C-Series transmission
Choice of LSD (Toyota LSD part #: 41301-20230)
Differential bearings Toyota part #’s: 90366-40094 and 90366-40097(old bearing can be reused if in good condition)
Axle Seals Toyota Part #’s: 90311-35051 and 90311-35044 (old can be reused depending on condition)
Speedometer gear Toyota part #: 33481-20160
RTV Silicone Sealant
Another person to help

Tools you will need:
Ratchet
12mm socket
14mm socket
6mm allen wrench
12mm open ended wrench
rubber hammer
several wedges or large screwdrivers
access to a bearing press/puller

C60 Transmission

Using a 6mm allen wrench and needle nose pliers, remove this ball, spring and sleeve from this hole.

Use a 12mm socket and an extension to remove the 16 bolts holding the bell housing to the Tranny mid-case.There are 13(gold) on the outside of the bell housing and 3(silver) on the inside.

Use wedges and a rubber hammer to separate the bell housing. It is held in by dowel pins and believe me, it is on there good. Be careful not to damage the contact surface on either case.

The inside of the bell housing. This half contains the differential.

Here without the Differential.

The opposite side contains the gears and shift assembly.

This is the magnet that sits in the bell housing. Clean all the little slug off and re-place it.

Remove the bolts holding the ring gear onto the open differential and use a hammer to separate them. DO NOT HAMMER ON THE RING GEAR.

The open diff on the left, the LSD on the Right.

Now you need to have the bearings pulled from the old differential so you can remove the spacers that you will need to re-use. Place the spacers and speedometer gear on the new LSD and have the bearings pressed on. You can also use a piece of wood and a hammer. Pay careful attention to with way the speedometer gear is facing, it should be the same as on the old diff. The same goes for the bearings, each is made for it’s specific side.
*sorry no pictures*

Boil the ring gear in an old pot for a bit, then let it cool.
Now start bolting the ring gear onto the LSD. You can use a heat gun to make the install easier and seat the bolts.

Torque them to 74ft/lbs(when the ring has cooled).
Joshua Maximum shows us how to put our backs into it.

Now you can place the LSD into the bell housing.

Loosen the reverse fork bracket(2 bolts) just a bit so that the reverse pin can squeeze into place when the tranny is reassembled.

Clean off all the old sealant from the two contact surfaces and reapply a new bead.

Start reassembly by lining up the two halves and locking in the ring gear with the output shaft gear, you can turn the ring gear with a screwdriver and the whole assembly should fall a little closer together.
Now comes the tricky part, one person will have to hold the tranny about an inch from closed while another uses a 12mm open ended wrench to tighten down the reverse fork bracket bolts that you loosened. Be careful not to disturb your sealant.

Now the tranny should come back together easily. Replace the 16 bolts and torque to 22ft/lbs.

Now replace the ball and spring into its hole and tighten down the allen nipple.

Now your done! Make sure you can still shift through all the gears and your good to go. Doing it this way takes patience and mechanical ability.

LaserMcknight