C6 Trans .... dead?

[40thh]

Open to suggestions before I pull the C6 trans from my '67.

Getting to the back end of a resto mod build up, 428cid and C6 from a Thunderbird transplanted into a Mustang.  Have added a B& deep pan with associated pick up, filter, etc.  New 'F' grade ATF also put through the trans, although old fluid looked clean and internal looked good when changing pan over.

Driveline worked fine 12 months back when first acquired, and after sitting around for a while it's been fine driving in/out of the shed.

For some reason the trans has lost drive in all gears, and there is no fluid flow through the cooling circuit.

Intend to drop the pan shortly to look for anything obvious, but thought I'd throw the question out to any C6 gurus who might know of an obvious problem to check out.

I was thinking of a stuck check valve or dead pump .... but any opinions welcomed.

[6T9rustang]

Open to suggestions before I pull the C6 trans from my '67.

Getting to the back end of a resto mod build up, 428cid and C6 from a Thunderbird transplanted into a Mustang.  Have added a B& deep pan with associated pick up, filter, etc.  New 'F' grade ATF also put through the trans, although old fluid looked clean and internal looked good when changing pan over.

Driveline worked fine 12 months back when first acquired, and after sitting around for a while it's been fine driving in/out of the shed.

For some reason the trans has lost drive in all gears, and there is no fluid flow through the cooling circuit.

Intend to drop the pan shortly to look for anything obvious, but thought I'd throw the question out to any C6 gurus who might know of an obvious problem to check out.

I was thinking of a stuck check valve or dead pump .... but any opinions welcomed.

Sounds like a crook pump.  I had  a similar problem with my C6 and ended up being crook pump.

[EXHAUSTED]

Did the problem only occur after fitting the new pan? Had the same problem. Try adding a couple more litres of fluid & recheck. Ignore the level on dipstick. It's worth the shot before pulling trans out!