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Old 08-31-2001, 05:29 PM
pgiw pgiw is offline
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C6 Transmission won't shift into 3rd anymore

I have a 1976 F150 4x4 with a 360 and C6. The truck is mainly used for hauling trash, etc. and often sits for a month or so without regular use. The transmission has always worked OK since I bought the truck two years ago, but when I went to drive is a few weeks ago it would no longer shift into 3rd gear. It had sat idle for about 6 weeks before this. The last time I drove it it didn't have any problems and I've never known it to slip or anything. I checked the fluid level and it seems fine. Not sure about the color since i'm not familiar with automatics, but it doesn't look real dark or smell burnt. I also checked the vacumn hose from the carb and it looks OK, although I didn't try clipping off a few inches to get a better seal. I asked a couple of shops and both said they thought I needed a rebuild and quoted ~$1200. Neither of them actually looked at the truck. I can't see spending a ton of money on this old work truck so I started looking for used C6 but no one in my area has one. The yards all said I was looking at around $250 for an exchange. Is there anything else I can check/try before I replace this thing? I can't believe the tranny just self destructed while sitting for a month or so. Any advice is welcomed! Thanks!
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Old 09-01-2001, 06:58 AM
Nathan Nathan is offline
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C6 Transmission won't shift into 3rd anymore

Check to see if the kickdown linkage has it stuck in passing mode. There is a plastic hickey down at the tranny kickdown lever that sometimes wears and binds it up.

Nathan
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Old 09-01-2001, 07:35 AM
390fe 390fe is offline
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Jason Kendrick
C6 Transmission won't shift into 3rd anymore

You might also try replacing the vacuum modulator and the entire piece of vacuum hose.
Jason Kendrick
1970 F100 Custom 390/C6
1978 F150 Ranger Lariat Supercab 460/C6
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'93 F350 Crewcab 5.8L
'70 F100 Custom 390/C6 (temporarily retired)
'93 Mercury Topaz 2.3L
'99 Ford Windstar SEL (bad transmission - For sale)
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Old 09-01-2001, 07:40 AM
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C6 Transmission won't shift into 3rd anymore

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Old 09-01-2001, 07:40 AM
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3rd, 78, c6, color, drive, ford, gear, modulator, passing, shift, sticking, transmission, troubleshooting, windstar, wont

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