C6 shifting issues

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Jun 17, 2007 | 05:23 PM

ygoldsberry

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Joined: Jun 2007

Posts: 129

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C6 shifting issues

Just bought a '73 F100 today, and it had the orginial 360 and tranny swapped out for a '77 400 with a C6 at some point in it's life.

The problem I am having is that after shifting into drive or reverse, after a few mins, it drops{?} out of gear and will not move. The only way to get it to shift again is to shut off the truck for about 5 mins, and then it will shift into gear, but only for a few mins again.

Any ideas as to the cause??

Jun 17, 2007 | 06:58 PM

javi2001

Posting Guru

Joined: Apr 2003

Posts: 1,153

Likes: 1

From: Venezuela

Oil level
Oil filter
Wear at Oil pump
Internal leaks
Perform also a pressure test.

Jun 18, 2007 | 07:52 PM

ygoldsberry

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ok i just said i did a pressuare test but i was thinking wrong it was a vaccum test

Last edited by ygoldsberry; Jun 18, 2007 at 07:59 PM.

Jun 19, 2007 | 08:27 AM

stuart1

Cargo Master

Joined: Jun 2003

Posts: 2,982

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From: Somewhere Saskatchewan

Quote:

Originally Posted by ygoldsberry

I don't see any mention of any tests being done but this sounds like a low fluid level or clogged filter.
A clogged breather will cause an incorrect fluid reading.
If the breather is clean and the level is correct remove the pan and look for anything clogging the pickup screen.