Help w/C4 auto leak vicinity trans & adapter

[cmc]

I have finally managed to get the C4 pan to stop leaking....almost. Now it is leaking between the C4 and adapter or adapter and T-case....can't tell for sure. It drips around the crossmember(ref pic's); not a lot, but enough to be a problem. Also, it only seems to leak after sustained highway speeds? I have researched cb for similar issues; confirmed trans fluid level is correct; vent clear, etc....

Appreciate any thoughts/advice to confirm leak location and what seal or gasket to replace first.

Thanks!

 

[Viperwolf1]

It's probably coming from the vent. Sustained highway speeds will really heat the fluid and cause it to expand. You need to check the level just after one of those drives.

 

[cmc]

Viperwolf thanks for the reply; I will check again after a highway drive; the vent seems to be working fine, but maybe I am missing something. The vehicle was not driven much for a few years before I purchased and I have been slowly working through some issues...it does run a little higher RPM's since I dropped the tire size down to 32 vice 33; tach shows ~3200 @ 65....not sure this has any impact on the trans issues, but thought I would mention it.

 

[broncnaz]

I would say vent as well. Now after sitting a few years the pan gasket could have shrank a little and may just be leaking a bit. I would probably do a check on the pan bolts they may need to be tightened up a little. Of course it may be a good time for a filter and fluid change which would net you a new gasket as well.

 

[blubuckaroo]

Try snugging up the adapter bolts to the tranny. That's where mine was leaking from.

 

[cmc]

The trans fluid, filter and gasket have all been changed; pan "rails" were a little warped but fit a lot better now; very little leaking from the pan. I will check the adapter bolts....Thanks for the comments!