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Old 08-10-2003, 10:37 PM
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C-6 shift hesitation

I have a 79 F-150 with a 460 and a C-6 tranny. When you shift from P, R, or N to any of the forward drive gears like D, 2, 1, there is up to a two to three second delay before the gears grabs. This is very frustrating when backing out of the driveway and you have to wait for it to grab and there are cars coming. However, you can shift from D, 2, 1 to N, R, P and there are no problems. Is there a problem with my intermediate bands? Should I adjust them per the Haynes manual? Whats wrong with my tranny? Thanks in advance, Billybob

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Old 08-11-2003, 05:32 PM
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Check the fluid level. Adjsuting the bands should do no good at all. It sounds like either the fluid level is low, or it is time for a rebuild. It is taking time for it to build up pressure to the clutches.
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Old 08-11-2003, 06:27 PM
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billybob,

When was the last time the transmission was serviced? Change the oil and screen and see what happens.

scholman
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Old 08-11-2003, 06:46 PM
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Billybob.... Check the fluid level. If the fluid is dark, the best bet is not to change it. Trans fluid is high detergent. The effect of changing fluid when there is a problem, specifically if it is a C-4 or C-6, is quite often a trans that will not work at all. The fluid will, quite often, clean everything inside and put the debris in the valve body and governor. Since a C-6 has only a screen, and not a real filter, things can get through into places that stop shifting. It can also stop up the screen. Changing the fluid is preventive maintenance, not a repair for a malfunctioning transmission.
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Old 08-11-2003, 08:05 PM
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c6 trouble

chances are that there is too distance in forward clutch pack that will cause delay in apply time to move in drive.maybe hard inner o-ring in forward drum we call {morning sickness}
try an old timer trick for hard rubber in forward drum use 1oz of brake fuild added to trans fuild. wont damage anything just soften o ring abit dont go over board with the brake fuild, this wont cure a bad clutch problem.
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Old 08-11-2003, 10:09 PM
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Cool dirt common problem

a common problem on the C6 and C4 tranny. the inner O ring gets hard from the heat and does not seal.

try airworlds deal of the brake fluid or add a quart of engine oil to the tranny to see if thicker oil will help. 10w-40 or what you have may help the situation for a while....

chances are the service / fluid change will cause more grief than help on the C6 & C4 trannys.......at least in my world it seems to work that way.


all of these suggestions are a band-aid only. I imagine the tranny needs an OH
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