C6 not downshifting

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Mar 10, 2010 | 10:38 PM

F3fitty

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Senior User

Joined: Feb 2010

Posts: 222

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From: Lakeland, FL

C6 not downshifting

I have a 93 F350 460 with a C6. When I slow down or stop at a red light my tranny will not downshift back into a lower gear. So when I take off from a light or stop sign I have to really get into the gas to get moving. Doesnt help the already terrible gas mileage. What could be the reason behind this?

Sorry if this is a dumb question... i will admit I know nothing when it comes to auto trans. thanks

Mar 13, 2010 | 07:03 AM

master_mechanic

Senior User

Joined: Feb 2007

Posts: 208

Likes: 1

theres proabably dirt in the governor spool... put the truck in rewind on somthing soft and rug it for a couple seconds... that sould clean it out.

Jun 18, 2010 | 01:48 PM

dman2008

Posting Guru

Joined: Oct 2008

Posts: 1,038

Likes: 11

From: Southern AB

Ok so I had this problem happen to me recently and what I did was remove the tailshaft portion and take the govener out and took it apart and cleaned up the pistons with a red scratch pad or some emery cloth, and put it back together. i used lots of trans fluid on it to clean it as tranny fluid cleans things real nice, and put it back together and add a couple bottles of Lucas trans fluid conditioner and after a couple hundred KM it started to work real good.

Which makes me happy cause when you're at a stop and try to take off in 2nd or third it sucks!

Have fun and a bit of advice there is a fair bit of fluid in the tailshaft just ask me how I know, I even had a pan ready but my trans jack was in the way so it was all over. My poor garage floor