Shifts Funny
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Freshman User
Joined: Dec 2003
Posts: 38
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From: Western NY
Shifts Funny
I have a 96' F-350 Crew 4X4 PSD that I bought about two months ago. The guy I bought it from was older and hardly drove the truck (2000 miles last year). When test driving it I noticed that the tranny didn't shift where I thought it should. It went long in 2nd and then short shifted 3rd into OD. He said this started when it had sat for so long un-driven. So I drove the heck out of it for a month and then had the tranny backflushed at the shop. $82 later and it still shifts the same way. In normal driving conditions it doesn't affect anything but I plan on slugging a truck camper and towing a 20ft. cargo trailer with it. The tranny is either a E4OD or a 4R70W I not sure which. All I know is come summer time its time to roll and I have to have this problem resolved so any help you guys can give me will be appreciated.
Greg
Greg
Cargo Master
Joined: Oct 2003
Posts: 2,833
Likes: 4
From: Jefferson, Iowa
It is a E4OD or a 4R100, the 4R70W was in the F150's. Might be the Throttle Position Sensor, but my tranny shifts weird, 4 speed tranny and it shifts 5 times??? I think that is from the regulator valve being too small. Diablo makes an aftermarket valve, it is larger to let more fluid through, and i think that would solve my problem. I would take it to autozone, or a local parts store that can pull the codes, and check engine diagnostics. I'm sure the sensor would come up on there.
Senior User
Joined: Nov 2003
Posts: 251
Likes: 0
From: Ocala, FL
I think the "5th" gear shift you are feeling is your torque convertor locking up in "direct drive" mode in 4th gear {OD}. Perfectly normal and one of the reasons a PSD gets such good unloaded fuel milage. My '86 Ranger 2.9 A4LD did the same "5th" gear shift too except it would slide back and forth between lock-up not locking up. Very annoying. My PSD doesn't do that
. Just 3 shifts and a lock-up that feels like a minor shift!
. Just 3 shifts and a lock-up that feels like a minor shift!
Cargo Master
Joined: Oct 2003
Posts: 2,833
Likes: 4
From: Jefferson, Iowa
Budget Racing, does your speedometer work fine? If it does, just go with my earlier recomendation, otherwise could be the sensor location in the rear differential, atleast my 00 superduty has the rear sensor, i might just be wrong and you do not have a rear sensor, i will take a look on my buddies 97 PSD.
