Tranny Problems / Introduction
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New User
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Tranny Problems / Introduction
Hey Ford Truck Fans,
I am new to this site and need some help. I have searched
the Forum somewhat but after a while of searching I have
not found any info about my troubles with my ole truck.
I have A 78' F-150 4x2 400ciV8 & C-6 Tranny with 69,000
miles on it, Well yesterday I noticed
the tranny started takin a mind of it's own,
it will not down shift automatically
when you come to a stop, and also from Park
it will not start off in 1st gear, feels like 2nd maybe
even drive. anybody got any ideas?
Thanks in advance Justin.........
I am new to this site and need some help. I have searched
the Forum somewhat but after a while of searching I have
not found any info about my troubles with my ole truck.
I have A 78' F-150 4x2 400ciV8 & C-6 Tranny with 69,000
miles on it, Well yesterday I noticed
the tranny started takin a mind of it's own,
it will not down shift automatically
when you come to a stop, and also from Park
it will not start off in 1st gear, feels like 2nd maybe
even drive. anybody got any ideas?
Thanks in advance Justin.........
Elder User
Joined: Jul 2005
Posts: 525
Likes: 1
Hey Justin. New to the forum to. Sounds like what my 77 f250 4x4 460/c6 did to me.
Found out that the kick-down arm came off the carb. Did the same thing would not downshift and started out in drive. Hope this helps .
Found out that the kick-down arm came off the carb. Did the same thing would not downshift and started out in drive. Hope this helps .
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New User
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The kickdown must be in place (did not look yet) because I can floor it and it'll kickdown into second?
another symptom I forgot to mention was it will not down shift at lower speeds in a pull. (for example: slowing down from highway speeds and turning onto a secondary road, the truck is in a strain it will not down shift automatically)
another symptom I forgot to mention was it will not down shift at lower speeds in a pull. (for example: slowing down from highway speeds and turning onto a secondary road, the truck is in a strain it will not down shift automatically)
Postmaster
Joined: Jul 2003
Posts: 2,544
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From: okc
make sure the shifter linkage is working properly, i know my C6 acts exactly like that when i accidentaly put it in 2nd instead of drive, it will start out in 2nd, go to third, then not downshift from 3rd.....make sure your not actually in 2nd gear when you have it in drive.....my 3 cents......
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New User
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Morning Guys,
I just want to say thank yall for responding to my post,
I think the linkage is OK, I can shift thru the D-2-1 positions and feel every
detent(sp). It will shift manually into 1st gear???
I will get a better idea of what the problem is when I get a chance to look things over more in detail
I just want to say thank yall for responding to my post,
I think the linkage is OK, I can shift thru the D-2-1 positions and feel every
detent(sp). It will shift manually into 1st gear???
I will get a better idea of what the problem is when I get a chance to look things over more in detail
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New User
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I wonder if a Fluid change would help? Only thing is.......I have been a bad boy, I have never changed the tranny fluid in this truck 
, I have owend it since 91'. But in my defense I have only put a few thousand miles on it 
, in that many years.
I am concerned about having the fluid changed though, I have always heard if you go for a long time without changing the fluid and then do, you run a chance on blowing a seal somewhere???? what is ya'lls(sp) take on this theory???
, I have owend it since 91'. But in my defense I have only put a few thousand miles on it , in that many years. I am concerned about having the fluid changed though, I have always heard if you go for a long time without changing the fluid and then do, you run a chance on blowing a seal somewhere???? what is ya'lls(sp) take on this theory???
New User
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I would change it. I know people who have done the same thing and after changing they didnt blow a seal. I have owned a couple of Ford Pick-Up's with C-6 Transmissions that did the same thing. Sometimes they would not downshift when slowing down unless you stepped into the throttle. Usually a fluid change helped. It sure cant hurt.
Lead Driver
Joined: Jun 2005
Posts: 8,471
Likes: 727
From: Calgary Canada
Old fluid can degrade and have different viscosity and properties. Since it's hydraulic forces that do most of the shifting work in your tranny, the correct fluid properties are important. Change the filter and fluid. Also, inspect the fluid that comes out of the tranny. Check for metal shavings and debris.
You may want to empty out the torque converter.
You may want to empty out the torque converter.
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GringoRWB
1987 - 1996 F150 & Larger F-Series Trucks
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Jan 31, 2002 11:50 AM