E4OD Shifting Hard, please help!!!
Senior User
Joined: Apr 2013
Posts: 150
Likes: 0
From: Dawsonville, Georgia
My transmission sort of does this too. It shifts, not super hard, but not smooth either out of first. 2nd to 3rd is fine, but 3rd will keep rising in rpm's, so usually I'll let off the gas, like a standard trans, then it will shift fine. I thought about getting it serviced, but I have been told it's nothing to harmful. It certainly needs the fluid changed and probably a new filter. That might help.
-Cody
-Cody
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Freshman User
Joined: Apr 2013
Posts: 34
Likes: 1
Just took it for a spin, shifting problems back again, dammit. No 624 code though, yay. I could live with the hard shifting if it didn't stall when I shift from drive to reverse and reverse to drive and the over heating was gone and I was stuck with the firm shifts.
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Freshman User
Joined: Apr 2013
Posts: 34
Likes: 1
Why the filter too?
I just read another forum about a guy with the same issues I'm having and finding out he just needed that clip on his filter to keep it in place. Tomorrow after work I'll drop the pan and hang the filter with a homemade clip and probably just replace all the fluid, or I think I'll do a half and half mix of new and old. People always post that used fluid is better for older transmissions and brand new fluid often causes other issues. Any thoughts on that?
I just read another forum about a guy with the same issues I'm having and finding out he just needed that clip on his filter to keep it in place. Tomorrow after work I'll drop the pan and hang the filter with a homemade clip and probably just replace all the fluid, or I think I'll do a half and half mix of new and old. People always post that used fluid is better for older transmissions and brand new fluid often causes other issues. Any thoughts on that?
The Southernmost Mod
Joined: Dec 2004
Posts: 6,902
Likes: 21
From: Caracas, Venezuela
How many miles does that truck have? personally I think new fluid is always better, even more if yours overheated. One thing is using old fluid and othe using overheated fluid, which isn't too smart. I would either replace the radiator to make it part of the trans cooling system once again or add an elec fan to the aux. cooler. Actually, I would do both. Check the E4OD Cooler link on my signature, you might get some tips there.
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Freshman User
Joined: Apr 2013
Posts: 34
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Update:
Dropped the pan and checked the filter. Fitted a clip to keep it in place. Added a few quarts of fresh fluid, used fluid seemed ok and most was new from me adding the other day but wanted to eliminate possibility of the old fluid affecting the erratic behavior.
No change. Still bogs down in reverse, didn't take it for a long drive so it might not be over heating so bad, but the fact of the matter stands that the reverse issue and the stalling issue persists. Darn it all...
Any ideas where to go next?
Dropped the pan and checked the filter. Fitted a clip to keep it in place. Added a few quarts of fresh fluid, used fluid seemed ok and most was new from me adding the other day but wanted to eliminate possibility of the old fluid affecting the erratic behavior.
No change. Still bogs down in reverse, didn't take it for a long drive so it might not be over heating so bad, but the fact of the matter stands that the reverse issue and the stalling issue persists. Darn it all...
Any ideas where to go next?
The Southernmost Mod
Joined: Dec 2004
Posts: 6,902
Likes: 21
From: Caracas, Venezuela
So it works just fine going forward and stalls when you're in reverse. Check the IAC and TPS. If there is no other strange behavior from the truck then those could be the culprits.
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Freshman User
Joined: Apr 2013
Posts: 34
Likes: 1
Alright, well I changed the tps sensor last week and cleaned the IAC with carb cleaner and a brush and wow was it gunked up, that was last week too. Could it just be a cheap replacement sensor I have? Is there any adjustment I needed to do when I replaced it?
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Brett Foote
Elder User
Joined: Dec 2003
Posts: 660
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From: Northern California
Better yet, pull the PCM and see if it has an internal problem.
Post # 28:
Post # 28:
At this point, before you drive it anymore, I'd remove the PCM and look for leaking capacitors or something burnt on the circuit board.
Here's a little reading you need to do and what to look for.
Click here:A9x ECM's (and same years ECM's) Failures Due to Age
As I stated earlier, "There is also the possibility that your PCM is "starting to fail". Others have reported that replacing their PCM has resolved their shifting problems too".
After all, the PCM DOES CONTROL the transmission.
Bob
Here's a little reading you need to do and what to look for.
Click here:A9x ECM's (and same years ECM's) Failures Due to Age
As I stated earlier, "There is also the possibility that your PCM is "starting to fail". Others have reported that replacing their PCM has resolved their shifting problems too".
After all, the PCM DOES CONTROL the transmission.
Bob
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Freshman User
Joined: Apr 2013
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Hey bob sorry I should've mentioned, I pulled that off and other than some excessive corrosion on the plug I didn't see anything significant. No bursting capacitors or anything. Used a wire brush on the pins and plug, should I uses some di electric grease?