Transmissions
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New User
Joined: Sep 2016
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Yes I have the overdrive (I tried reading up on it seemed best to leave it alone considering I don't know much about it and am worried about the transmission),no warning lights. It seems to shift gears pretty hard especially coming out of low. Also on the highway it'll start vibrating pretty good.
Fleet Owner
Joined: Jul 2006
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From: Mi'kma'ki
have you tried pulling codes and inspected the u-joints and tires for possible cause of the vibration already? these are pretty expensive transmissions to condemn without knowing the issue 100%.
FTE Legend
Joined: Jun 2006
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From: Ottawa, Ontario
Driveline vibration at highway speeds could be a bent or out of balance driveshaft.. the aluminum versions are notorious for this. The 2 piece steel units must be perfectly aligned to prevent vibration, if the truck has a lift it will most likely need some changes to the carrier bearing spacer block to get the shaft as straight as possible and even then sometimes it will need a double cardian joint added at one end or the other.
A hard shifting E4OD is a classic symptom of a sensor problem, pull the codes to see what is flagged. Sensor issues will put the computer into a protection scheme and that is what produces the hard shifts, it's often something to do with either the TPS or the speed input.
A hard shifting E4OD is a classic symptom of a sensor problem, pull the codes to see what is flagged. Sensor issues will put the computer into a protection scheme and that is what produces the hard shifts, it's often something to do with either the TPS or the speed input.
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Also not completely ready to condemn yet. However I am probably going to try to replace it with something from a salvage yard. Just wanted to know my options so I could start keeping my eye open. Thanks for all the help.
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FTE Legend
Joined: Jun 2006
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From: Ottawa, Ontario
Do not blindly replace the trans without doing a ton of troubleshooting, this thing is 100% computer controlled and while it has some known mechanical issues in the early years it's more likely you just have a bad sensor or wiring/connector issue.
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New User
Joined: Sep 2016
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Thanks conanski super helpful! I'll go get codes pulled right now. And start trying to check out the drive shaft. It also has 250,000 hard miles on it and the the transfer case seems to be leaking if that helps
Hotshot
Joined: Jun 2015
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I talk to a guy that knows who bought my '94 Bronco and the guy is still driving it and loves the truck. It had 200K+ miles on when I sold it. Apparently replacing the TPS before I sold it, must have fixed the intermittent hard shifting issue I fought with for two years.
Elder User
Joined: Dec 2013
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From: Kansas City, KS
Also, is the transmission fluid red, brown, or even black? Does it smell burnt?
Maybe have a trans. shop tech. take it for a drive?
Freshman User
Joined: Sep 2016
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Driveline vibration at highway speeds could be a bent or out of balance driveshaft.. the aluminum versions are notorious for this. The 2 piece steel units must be perfectly aligned to prevent vibration, if the truck has a lift it will most likely need some changes to the carrier bearing spacer block to get the shaft as straight as possible and even then sometimes it will need a double cardian joint added at one end or the other.
A hard shifting E4OD is a classic symptom of a sensor problem, pull the codes to see what is flagged. Sensor issues will put the computer into a protection scheme and that is what produces the hard shifts, it's often something to do with either the TPS or the speed input.
A hard shifting E4OD is a classic symptom of a sensor problem, pull the codes to see what is flagged. Sensor issues will put the computer into a protection scheme and that is what produces the hard shifts, it's often something to do with either the TPS or the speed input.
How do you pull these codes. My 350 automatic is starting to randomly flash the overdrive button. I did some research that said it could be numerous things and I needed to hook my od2 reader to it. I did this and nothing came up and suggestions?
