Tranny shudder.
06-25-2015, 06:21 PM
#11
mine is having the same issue, seems like it got worse when i put the 35's on the truck
most of the people i have talked to said the truck needs regeared and it wont be trying to switch in and out of overdrive as often.
most of the people i have talked to said the truck needs regeared and it wont be trying to switch in and out of overdrive as often.
06-28-2015, 11:46 PM
#12
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I have an 07 fx4 with 114k miles. I've experienced two similar issues and fixed both. First were the plugs and cops. When accelerating I would get a thump...thump thump..thump type of thing going on. I just ordered a full set of accel coils and that turned out to be the 80% solution. Changed the plugs next and ran like a top!
The other issue I had was what felt like I was hitting a rumble strip on the side of a highway. It only lasts for half a second when lightly accelerating to maintain speed-usually up a slight grade. However it did not do it with overdrive turned off. I drove around for a couple of weeks with overdrive off and the problem fixed itself. I'm speculating that there was a buildup of burnt tranny fluid on the torque converter clutch causing it to slip a little. The fix for that would be a tranny flush but that was a year ago and mine never came back. Hope that helps.
The other issue I had was what felt like I was hitting a rumble strip on the side of a highway. It only lasts for half a second when lightly accelerating to maintain speed-usually up a slight grade. However it did not do it with overdrive turned off. I drove around for a couple of weeks with overdrive off and the problem fixed itself. I'm speculating that there was a buildup of burnt tranny fluid on the torque converter clutch causing it to slip a little. The fix for that would be a tranny flush but that was a year ago and mine never came back. Hope that helps.
06-29-2015, 01:32 AM
#13
I have an 07 fx4 with 114k miles. I've experienced two similar issues and fixed both. First were the plugs and cops. When accelerating I would get a thump...thump thump..thump type of thing going on. I just ordered a full set of accel coils and that turned out to be the 80% solution. Changed the plugs next and ran like a top!
The other issue I had was what felt like I was hitting a rumble strip on the side of a highway. It only lasts for half a second when lightly accelerating to maintain speed-usually up a slight grade. However it did not do it with overdrive turned off. I drove around for a couple of weeks with overdrive off and the problem fixed itself. I'm speculating that there was a buildup of burnt tranny fluid on the torque converter clutch causing it to slip a little. The fix for that would be a tranny flush but that was a year ago and mine never came back. Hope that helps.
The other issue I had was what felt like I was hitting a rumble strip on the side of a highway. It only lasts for half a second when lightly accelerating to maintain speed-usually up a slight grade. However it did not do it with overdrive turned off. I drove around for a couple of weeks with overdrive off and the problem fixed itself. I'm speculating that there was a buildup of burnt tranny fluid on the torque converter clutch causing it to slip a little. The fix for that would be a tranny flush but that was a year ago and mine never came back. Hope that helps.
06-29-2015, 05:50 AM
#14
Moderator (Ret.)
If the issue remains after replacing plugs and cops, check the drive shaft U-joints. Does the truck have a lift? With a lift and 35's, you would be placing a different angle to the drive shafts, and this may be the reason for "jerky" shifts and "shudder". The stock drive shafts and their U-joints are designed to be as parallel as possible.
Also, what is the rear gearing ratio of your truck? 35's have a whole lot more in the way of rotational mass; this is going to play heavy on that transmission.
At the very least, a transmission cooler should be added if the truck did not come with an auxilery one (towing package option)
Also, what is the rear gearing ratio of your truck? 35's have a whole lot more in the way of rotational mass; this is going to play heavy on that transmission.
At the very least, a transmission cooler should be added if the truck did not come with an auxilery one (towing package option)
Last edited by Mod (Ret.); 06-29-2015 at 05:52 AM.
06-29-2015, 11:20 PM
#15
If the issue remains after replacing plugs and cops, check the drive shaft U-joints. Does the truck have a lift? With a lift and 35's, you would be placing a different angle to the drive shafts, and this may be the reason for "jerky" shifts and "shudder". The stock drive shafts and their U-joints are designed to be as parallel as possible.
Also, what is the rear gearing ratio of your truck? 35's have a whole lot more in the way of rotational mass; this is going to play heavy on that transmission.
At the very least, a transmission cooler should be added if the truck did not come with an auxilery one (towing package option)
Also, what is the rear gearing ratio of your truck? 35's have a whole lot more in the way of rotational mass; this is going to play heavy on that transmission.
At the very least, a transmission cooler should be added if the truck did not come with an auxilery one (towing package option)