KMS Differential Questions

[E5USMC]

Thanks....I'm gonna try the teflon tape on the fill plug. I think the diff was over initially filled based on how much gear oil drained when I removed the plug so that may be part of the issue. I emailed KMS to ask what oil level they recommended for their diff. Should it be to the fill hole or slightly lower. I've been told both.

Also asked them what gear oil they recommend and if friction modifier was needed on the TrueTrac diff ( think that's what the T.T. stands for) ... again...been told yes and no.

Hopefully get it figured out a sealed up tight!!!!

[patrickt]

Originally Posted by E5USMC

Also asked them what gear oil they recommend and if friction modifier was needed on the TrueTrac diff ( think that's what the T.T. stands for) ... again...been told yes and no.

You should certainly double check to make sure what you have, but the TrueTrac is pretty darn nice, and gear based, so you don't have clutches or friction modifier issues. Sometimes Powr-Loks will "ratchet" around corners and you have to drain the stuff and add more modifier to get it to stop.

[rodneym]

E5USMC,

In my CSX (with same KMP diff as yours except you have the new billet cover ) I had a similar issue. During the install shakedowns, everything was great. Then on my first "long" drive (1 hr home) I found a big mess under the rear - gear oil everywhere! I check the level and it was about .5" below the fill plug, so it was initially overfilled, got to a real operating temp and puked, and found its new level. It initially had a breather tube pointed down at about the same height as the diff, which I believe may have acted as a siphon. I installed a catch can inside the trunk like on my KMP and it's been dry since.
That drip from the fill plug was definitely a sign of it being overfilled (or the plug not nearly tight enough) but should have held anyways like patrickt said.
With the new fill level and can, you'll be fine.