c6 leaking BAD?

[ericnhu]

just picked up a 69 stang.

302=306 with a C6

Trans leaks in lower drive gears pretty bad, but reverse will pretty much empty a full trans in seconds!

My guess was pump, but wanted to see what you guys think it could be?

This is the start to a long project, so I will be here often.

eric

 

[1967project]

Since you didnt say where it was leaking from, I will go out on a limb here and throw out what comes to mind.

First check to make sure the 17 pan bolts are there. If so they may have been over-tightened and caused your pan to flex. Or not tightened at all. (should be 10-14 ftlbs torque if not mistaken)

Second check the shifter shaft, there should be a seal on it.

Third check the O-ring at the end of the shaft. During a re-build the wrong size can be put back in.

Other areas for leaks are the pump o-ring, front seal near the bellhousing, rear seal by driveshaft,

 

[ericnhu]

updated info

looks like its from the front pump area. pan is tight and flush... no sign of leaks from shifter input, tailshaft seal has tiny leak.

I looked under the car as it was cycled thru the gears. Dumped about 4 qts trans fluid in 30 seconds in reverse (powerbrake to load without tire spin)

The best guess I have is the pump, but just wanted to know, due to the different volume of leaking in different gears, could it be a valvebody issue or something else?

I'll be visiting this forum often and will have pics up soon.