warped e40d case?
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Senior User
Joined: Dec 2009
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From: Billerica, Massachusetts
warped e40d case?
Hey guys how likely is it that my e40d case is warped. I had it rebuilt about 3 months ago and was fine until 2 weeks ago. lost reverse and 3rd gear. they it came back. since then it has been doing screwy things like starting out in second and wont shift. if you can get it to 40 mph it will shift into od but no tc lock up. one time it was shifting really early ex. Shifted into second right away, lock tc at 25, and then shifted into od at 30. lugged the engine pretty bad. did this in stop and go traffic for 20 min then just went away. its at the trans shop now and he said it could be something with the valve body or actuator for something but if all that checks out then he said alot of time the diesels will have wrped cases and he doesnt know what to tell me..... WTF ive never heard of such a thing
What dod you guys think
p.s these syptoms are very on and off. sometimes truck will drive perfect i dont get it
thanks for your thoughts shaun
What dod you guys think
p.s these syptoms are very on and off. sometimes truck will drive perfect i dont get it
thanks for your thoughts shaun
Post Fiend
Joined: Dec 2010
Posts: 10,121
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From: Orrville, Ohio
Mmm, yeah... not buying that warped case explanation. Valve body issues, maybe... These transmissions are electronically controlled so all the shift points and TC lockup are controlled by the PCM. How does your speedometer look? Any bouncing in the needle while driving? The PCM uses the VSS on the rear diff housing to determine vehicle speed and to establish a map for shift points based upon throttle application, engine load, etc. If the VSS is acting screwy then the PCM will have a hard time shifting like it should. The other thing that can cause these issues is the electrical connector on the driver side of the tranny. If that connection isn't clean and tight then you can see some screwy issues as well.
Just out of curiosity, what was the transmission doing that prompted the rebuild?
Just out of curiosity, what was the transmission doing that prompted the rebuild?
Thread Starter
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Senior User
Joined: Dec 2009
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From: Billerica, Massachusetts
Mmm, yeah... not buying that warped case explanation. Valve body issues, maybe... These transmissions are electronically controlled so all the shift points and TC lockup are controlled by the PCM. How does your speedometer look? Any bouncing in the needle while driving? The PCM uses the VSS on the rear diff housing to determine vehicle speed and to establish a map for shift points based upon throttle application, engine load, etc. If the VSS is acting screwy then the PCM will have a hard time shifting like it should. The other thing that can cause these issues is the electrical connector on the driver side of the tranny. If that connection isn't clean and tight then you can see some screwy issues as well.
Just out of curiosity, what was the transmission doing that prompted the rebuild?
Just out of curiosity, what was the transmission doing that prompted the rebuild?
I really hope your right. the reason he said it could be warped is because 3rd and reverse are on the same drum andthat reverse doesnt rely on any electronics or selionids. i had it rebuilt befor because it was taking forever to go into reverse and didnt want to shift through the forward gears he said that 3rd gear was gone and i had a possible tc failier. i spent $2500 to sell it other wise i would have bought a bts. i did a little beefing up. hd sprags, hd tc and a shift kit.
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Senior User
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From: Billerica, Massachusetts
I completely agree. You are saying that if it is warped it would have these problems all the time not on and off. It doesn't seem to be heat related either because its does both hot and cold.
Post Fiend
Joined: Dec 2009
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From: Livoina,La
Correct if it was warped at let's say 2nd then the fluid would just bypass the clutch pack and cause it not to shift.
My buddy's trans was rebuilt 3times in a week and it would do the same thing every time so they told him it has to be the case he found a place that's sells just a case for 120.00 shop built it again with the new case and all is good
My buddy's trans was rebuilt 3times in a week and it would do the same thing every time so they told him it has to be the case he found a place that's sells just a case for 120.00 shop built it again with the new case and all is good
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Senior User
Joined: Dec 2009
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From: Billerica, Massachusetts
Correct if it was warped at let's say 2nd then the fluid would just bypass the clutch pack and cause it not to shift.
My buddy's trans was rebuilt 3times in a week and it would do the same thing every time so they told him it has to be the case he found a place that's sells just a case for 120.00 shop built it again with the new case and all is good
My buddy's trans was rebuilt 3times in a week and it would do the same thing every time so they told him it has to be the case he found a place that's sells just a case for 120.00 shop built it again with the new case and all is good
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Thread Starter
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Senior User
Joined: Dec 2009
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From: Billerica, Massachusetts
That's big money though right ?, also i dont see how it could be warped because i have never seen the trans temp over 175 isnt heat the only reason it will warp
Posting Guru
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its not so much looking gears that's the Issue, its the tc not locking first thing in the morning. Shifts threw all the gears fine but you have to drive for 5 mins It seems and make 3 to 5 are then Its fine. Diving it the other night it just dropped everything but 1st and 2nd at full temp. Let it sit for a hour, drove It home in second, put it to the wood and it all came back.
Post Fiend
Joined: Dec 2010
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From: Orrville, Ohio
its not so much looking gears that's the Issue, its the tc not locking first thing in the morning. Shifts threw all the gears fine but you have to drive for 5 mins It seems and make 3 to 5 are then Its fine. Diving it the other night it just dropped everything but 1st and 2nd at full temp. Let it sit for a hour, drove It home in second, put it to the wood and it all came back.
Unless I am misunderstanding what you're trying to say, that is... I had a hard time following what you posted. I take it you two know each other and you're talking about his truck?