E4OD 1-2 shift issues, on going battle
This post brought me here. https://www.ford-trucks.com/forums/1...s-testing.html
Using this to help diagnose this further. Thanks to @subford ! If he can chime in here that would be great. Here is the run down: 1994 Ford F150 5.0 E4OD Purchased at auction, 1 owner vehicle with 162,000 miles on it. Trans issue was apparent at purchase. Current issue: Shifts slightly hard from 1st to second and a little from 2nd to 3rd. After that, mostly smooth sailing. I've replaced the following
Some intersections I take off and it's fine. Others not so. Maybe 3 out of 5 intersections it shifts a little hard. One thing I've noticed is that, when I disconnect the battery cable, then reconnect it, and drive. Of course it's good for a while and shifts like butter. To be expected. What I've also noticed is that if I stay under 40 mph, I don't believe the issue comes back. It's only when I go up to 60 and more so up hills that it comes right back, almost instantly. I wonder if I stayed on flat ground, it might actually not come back. I believe it's one of these top 3 that could be the solution to the issue:
I know the other options could be:
I plan on doing the following to further diagnose.
I'll post again soon with the codes. I forget the last few times I checked, what the codes were. All I know is they were the same codes. Maybe with the MLPS changed, things are different. |
I pulled codes and sure enough, got a new code. Old ones gone. I looked through my notes and found the previous codes:
When I first got the truck I had: 157, 452, 658 Then after some updates: 452 And now I have: 628 - torque converter slipping I really don't believe the torque converter is slipping. Seems to be fine when the reset everything. |
I believe the torque converter is slipping.
If you remove the inspection cover from the front bottom of the trans you can see the torque converter. If the converter is slipping when it should be locked the front face will get blued, similar to the bluing on a gun. It only takes 50 RPM of slip to set the code. Can you detect that? I can't. The computer can. |
Originally Posted by dualsportguy
(Post 19524726)
I pulled codes and sure enough, got a new code. Old ones gone. I looked through my notes and found the previous codes:
When I first got the truck I had: 157, 452, 658 Then after some updates: 452 And now I have: 628 - torque converter slipping I really don't believe the torque converter is slipping. Seems to be fine when the reset everything. |
Thanks @Mark Kovalsky and @Da_Lariat_Chariot.
I'll double check the things listed above but from all the posts I've read, many Mark posted on, does seem like a converter is in the mix. Seems odd since it drives fine till the code is thrown but transmissions aren't my area of expertise. Makes me think it's more of a sensor issue or electrical. In any event, I'll try the things I mentioned, I'll check the converter per Mark's suggestion, and see what results I get. At this point I'm assuming I'm replacing a torque converter. That being said, any advice on replacing the torque converter? I've never done it but read up and it seems straight forward. Anything beyond the converter I should replace? Some mention putting a shift kit in. I have a new trans filter and gasket so I'll wait to install till this is done. |
Test results
I tested at the voltage at two pin connection, ran the truck to 30 mph got 2.8 possibly 3.0 volts but nothing higher than that.
Didn’t get a chance to dig much further. Was going to do a RABS HZ test but the multimeter I have at home doesn’t have HZ testing ability. I got two at work that do so I’ll grab those this week Only thing I can add is that when I drive beyond about 50, there is a little play in the speedo. Not a ton. But it’s not steady. Maybe 1-2 mph sway. Not sure that’s a concern or not. Still leaning toward torque converter? |
Been pretty busy, haven't had time to work on the truck.
So all electrical checked out. One of two last things I didn't try: 1. Inspect torque converter for bluing 2. Check fluid further. I went with fluid tonight. I checked it once before and I thought it was good enough. I read up more on how to properly check the fluid and I found the fluid to be a little low. On my dip stick I have two holes and then the hash mark is above those. The dipstick says do not add if within the hash marks. When I first checked, it was close to the top hole but not in the hash at all. I added what I'm estimating about 300ML to it and got it to the hash marks, about mid way. Drove the truck after and hard to say it's fixed but it does shift better. I wouldn't think 300ML would make a difference but maybe it does? Anyone can chime in on that, that would be great! Going to drive it some more and check again, see where it's at and also if the code pops again. If this solves it I'm going to drain the tranny and install a new filter and gasket and new fluid. Seems odd it would be low when I don't have any leaks from the tranny at all. I'll look at the converter between now and this weekend. |
Is your rear end a limited slip?
I have a new truck, thought it had a shift kit in it, it shifts really hard. Now that I have owned it for a while, depending with how I drive it, it shifts normal some times and hard sometimes. My problem turned out to be the clutches in the rear end of the limited slip. New clutch packs, drive line is tight again. |
You might want to check if a shift kit was installed in the transmission. That would make the shifts harder, if the kit is aggressive or sporty it will be very noticeable.
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Update
I decided I'm replacing the torque converter to see if that fixes it. Based on everything I've found its shot. Didn't see the bluing but it shudders and the system keeps popping the same code. From what I've read many have had good luck with just replacing that. I know the proper thing to do would be to replace the trans as well. I'm hoping to get some more miles out of this one if I can. Also, there isn't a shift kit installed.
That all said, need some advice...
I do have a new TC and trans filter with gasket. I also have 24 quarts of Mercon V, enough to flush the system and fill. Any other advice is appreciated. Especially when pulling the trans and re installing. I have read up on how to do the TC removal and install. |
Dupliucate. Ignore.
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Originally Posted by dualsportguy
(Post 19637590)
That all said, need some advice...Should I flush the transmission first?
Originally Posted by dualsportguy
(Post 19637590)
OR Should I empty the fluid in the trans first?
Originally Posted by dualsportguy
(Post 19637590)
OR install new TC and then flush the system?
Originally Posted by dualsportguy
(Post 19637590)
I do have a new TC and trans filter with gasket.
Originally Posted by dualsportguy
(Post 19637590)
Any other advice is appreciated. Especially when pulling the trans and re installing. I have read up on how to do the TC removal and install.
l |
I haven't replaced the TC yet. I have the replacement TC and I haven't torn the truck apart yet. Plan is to do that this weekend.
Alright, I'll dump the fluid when I pull the trans. New gasket is a Hastings one and it's rubber. I will make sure to replace the hub seal and bushing. Was weary of doing that as I've never done that before but I'll figure it out and find it from that manufacture. Thank you @Mark Kovalsky for all the advice! |
Getting there
Didn't have much time in the last month but started pulling the truck apart last week. It's also about -6 out and maybe 20 degrees in the shop so things aren't moving the fastest. And I've never pulled a transmission. After I did it, I think I had 8-10 hours into it. Had trouble with one of the cooling lines and after I got everything unbolted, I couldn't find one last bell housing bolt. It was the one beside the frame rail on the passenger side. Got the transmission out and feel really good about how it game out.
I'm ready to start putting it back together. I know how to put the pump seal in but my issue is lubrication for installing the torque converter. So I'll fill the TC with 1 quart of Mercon V. Then my plan was to put a light coat of Mercon on the inside and outside of the TC neck, as well as the pump seal. Some say to grease these, some say to use transmission assembly lube. Unsure which. To me, it would make more sense to use ATF/Mercon. And then the nose (not sue what you call it, the front of the TC that meets the flexplate), some say to put a light coat of white lithium grease on it? Should I do that? I'm looking for clarification and if I need to lube anything else. I assume the neck of the TC inside and out, the front pump seal on the input shaft, should be enough. Do I need to grease anything? If so what and what kind of grease? |
Originally Posted by dualsportguy
(Post 19723320)
So I'll fill the TC with 1 quart of Mercon V.
Originally Posted by dualsportguy
(Post 19723320)
Then my plan was to put a light coat of Mercon on the inside and outside of the TC neck, as well as the pump seal.
Originally Posted by dualsportguy
(Post 19723320)
Some say to grease these, some say to use transmission assembly lube. Unsure which. To me, it would make more sense to use ATF/Mercon.
Originally Posted by dualsportguy
(Post 19723320)
And then the nose (not sue what you call it, the front of the TC that meets the flexplate), some say to put a light coat of white lithium grease on it? Should I do that?
Originally Posted by dualsportguy
(Post 19723320)
I'm looking for clarification and if I need to lube anything else. I assume the neck of the TC inside and out, the front pump seal on the input shaft, should be enough. Do I need to grease anything? If so what and what kind of grease?
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