Transmission Jerks when Coming to Stop
- Thread starter Hoos95
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- jerk jerking stop transmission
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Matticus
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What about other driveline components? Is it possible there is wear and/or a problem in the transfer case, joints etc that is causing the clunk/shudder you are feeling? Or does it definitely feel like a trans issue?
Long story short, I've got trans I've had replaced unnecessarily because it would often clunk when slowing down, right at 25mph, when it shifted into 3rd. I'm now convinced it's due to a sudden release in tension when the torque converter unlocks that then echos through something else in the driveline that has some slop
Long story short, I've got trans I've had replaced unnecessarily because it would often clunk when slowing down, right at 25mph, when it shifted into 3rd. I'm now convinced it's due to a sudden release in tension when the torque converter unlocks that then echos through something else in the driveline that has some slop
It’s 2WD so no transfer case.
It could be other components, but I’m very confident it’s the transmission and specifically the torque converter.
Does the computer or something need to be reset? Not sure why replacing fluid and filter is now causing a worse shudder.
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JExpedition07
That One Member
The torque converter clutch failed on my 2007 with 140k miles, I’m in for a transmission replacement whenever I get time to have it done. Too busy the next month and it drives and shifts perfectly fine.....only slightly higher rpm on the highway with no lockup. I was told it’s safe to drive it like that until inspection time if I had to.
My Fluid was full and slightly dirty but not burned or anything. Just a random failure with no warning or symptoms before it failed. One day it just decided not to lock up and threw a wrench on the dash. The route I’m taking is ordering a 6R75 from LKQ out of a totaled expy. They are available with lower mileage on them and are warranted for defects. $900 or so plus labor and shipping is the approximate damage.
My Fluid was full and slightly dirty but not burned or anything. Just a random failure with no warning or symptoms before it failed. One day it just decided not to lock up and threw a wrench on the dash. The route I’m taking is ordering a 6R75 from LKQ out of a totaled expy. They are available with lower mileage on them and are warranted for defects. $900 or so plus labor and shipping is the approximate damage.
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Matticus
Full Access Members
If the trans is likely shot, you could see if adding one of those anti slip additives does anything. I think all they do is thicken the fluid up. Could buy your some more time for cheap. I thought Lucas made some
I did actually add both LubeGard ATF protectant and LubeGard Dr. Tranny.
I’m thinking of dropping the pan again and replacing the extracted fluid with the fluid I initially removed, since I haven’t disposed of it. Maybe adding another 2oz LubeGard Dr. Tranny.
Thoughts?
Matticus
Full Access Members
Do both of those claim to help with slipping/hard shifting? I was thinking of this stuff
LUCAS LUC10009 24 Ounce Transmission Fix 24 Oz. https://www.amazon.com/dp/B000ARTZPO/ref=cm_sw_r_cp_apa_i_If2lDbXW6ERT7
You usually replace X amount of food with a certain amount of the additive
LUCAS LUC10009 24 Ounce Transmission Fix 24 Oz. https://www.amazon.com/dp/B000ARTZPO/ref=cm_sw_r_cp_apa_i_If2lDbXW6ERT7
You usually replace X amount of food with a certain amount of the additive
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Matticus
Full Access Members
Putting the old fluid back in just seems icky to me, but it may add back in the particles that were giving you the friction needed to mitigate the shudder
Exactly. So, add back that fluid (-24 ounces) and then add the 24 ounce Lucas?
Matticus
Full Access Members
I would do the Lucas first. If no luck, I would then try adding the old fluid
So if I do it that way, with no improvement, I would have to drop the pan to replace with previous fluid and risk losing the Lucas that was just added. Would I then add another Lucas?
Also, since the Lucas is extremely thick, the easiest way to add it would be dropping the pan and adding it to the pan with some fluid. Otherwise, going through the small dipstick would be difficult.
Matticus
Full Access Members
Yeah, just add more Lucas. Again, this is assuming the trans is living in borrowed time. So, I'm not worried about fluid being to thick,etc
Added a bottle this morning. Doing a lot of driving today so if there’s no improvement, I’ll add another this evening.
After adding the 24oz bottle of Lucas Oil Transmission Fix, there was no change throughout the day. I then removed 24oz of fluid from the transmission and added a second 24oz bottle of the Lucas Oil. Shuddering is still severe and there’s is no improvement.
Not sure what else to do except wait until it eventually goes and replace it. Should not have dropped the pan and replaced with new fluid in the first place.
Not sure what else to do except wait until it eventually goes and replace it. Should not have dropped the pan and replaced with new fluid in the first place.
Atman246
Full Access Members
When you say shudder,is this coming to a stop as in your original post,or is this something new? As both I and Alex said before,the bump shift on decel coming to a stop is a known issue that a tcm reflash fixes. If you now have a more pronounced shudder on decel coming to a stop,that may be something totally different as in a one way clutch,or a set of clutch discs internal to the transmission not releasing. Adding the lucas may actually have made it worse by gumming things up. I would go back to flushing the old fluid out. Run the trans to operating temp and then shutdown, Then remove a return trans cooler line and put into a bucket. Run the engine at idle as you are adding new fluid,old fluid goes into the bucket. Continue until you see clean fluid coming out of the return line. Shut down,put everything back together and top up fluid to proper level. Drive it for a few hundred miles to allow the new fluid to soak into the friction plates.
Back in the late nineties,this was an actual Ford fix for torque converter shudder on lock up. Customers were told to drive for 3000-5000 kilometers before returning. Don't recall offhand what a kilometer to mile conversion is,but i'm sure you can get the drift. Again,just my two cents,i've been out of that game for 15 plus years,that's why I stay in touch with the guys still in the game. Good luck Brother.
Back in the late nineties,this was an actual Ford fix for torque converter shudder on lock up. Customers were told to drive for 3000-5000 kilometers before returning. Don't recall offhand what a kilometer to mile conversion is,but i'm sure you can get the drift. Again,just my two cents,i've been out of that game for 15 plus years,that's why I stay in touch with the guys still in the game. Good luck Brother.
Hi Atman, actually today it seems as the jerking when coming to a stop is now gone and doesn't occur - I believe the Lucas Oil fixed it and was going to post that update. The shudder I'm referring to is in the 40-50MPH range while accelerating. The transmission grinds for a few seconds then harsh shuddering occurs until I accelerate/decelerate into a different gear. What do you recommend for that? Doing the fluid flush you mentioned?
Atman246
Full Access Members
That sounds exactly like the old aode/4r70w torque converter shudder. Doing the fluid flush I mentioned would also flush out the lucas treatment though. It's worth a try. Those were old 4 speed overdrives with a torque converter lock up. I think ours are up to six speeds now. Either way,you can actually see/feel at what gear its happening. Find a long straight open road with no traffic,start from a stop accelerating easy and watch the tach. Every time the tach momentarily bumps is a gear change. Count the gear changes up to six,then the torque should lock up. Try that and see at what point the shudder occurs. It will certainly pinpoint what the issue is. As I said before,good luck brother.
