Transmission Shudders at low RPM in OD
11-25-2011, 10:07 PM
#21
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Originally Posted by Mlkx4
Its not your transmission. It will end up being one or a combination of the following; Plugged cats, spark plugs, coil sticks, dirty maf, air filter. There are more possibilities but just a quick list...
11-28-2011, 10:24 PM
#22
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Thanks everyone for the tips and suggestions. I tried just about all of the low cost suggestions - changed my K&N, added the Dr. Tranny's, and even started using mid grade gas. The truck certainly runs smoother, but the shudder is still there. I think my next step is new plugs and getting the cats checked. Anyone have any idea what it generally costs to get the plugs replaced? I talked to my regular mechanic and he said he wouldn't even give it a shot - big problems with the plugs breaking off. He said the dealer is probably the best bet. Not sure about that advice.....
11-28-2011, 10:53 PM
#23
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your screwed
My truck did the shuddering one day out of the blue so we took it to the shop and the transmission was toast at 130,000 miles. I got new guts for my transmission even though it took them 2 weeks to do it, all i got to keep out of my old transmission was the outer shell. It rang up to be $1950.
12-02-2011, 07:46 PM
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Sounds like the same problem I have had on a few of my Tritans, the coil packs are bad for this. My 2002 mustang GT did this but would run a little rough at idle and my 2007 F150 would only do it under load in gear. My brother had his 2003 F150 do the same as well. I took my stang in to have it hooked up and diagnosed at a Ford dealership in town for $50 and had them tell me which cylinders weren't firing. If you have a good programmer it should do the same. I replaced #3 and #8 and it has run fine since, same thing with my truck but it was #6. Still a lot easier than doing plugs and worth a shot.
01-24-2012, 12:22 PM
#26
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Im having the same problem as describe by the original poster. 06 F150 84k miles 6" lift on 35s. When going down the highway getting into traffic slowing down to about 40-50 mph at about 1100 RPM the tranni goes back into OD and i give it a little gas and its like a Thud almost like hitting a bump. If i floor it it turns into a raped ape pulls hard no tranni slip at all. Called my local service writer that a deal with and he told me probably throttle body. Put a new throttle body in today same problem it didnt go away. This problem only happens at 1100 rpm at that low speed. watched the Tach it doesnt change stays the same.
01-25-2012, 06:26 PM
#29
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You called it!
Richfish
