No Overdrive
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Elder User
Joined: Oct 2004
Posts: 527
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From: Port Alberni
No Overdrive
Ive been having a problem with my O/D.My 95 F250 4x4 7.3 auto.The off lite starts flashing on the shift lever after about 2 hours of driving and I lose my o/d.And this makes my truck go from 1800rpm up to 2500rpm and this is no fun on the highway.Any ideas please as I have a deal pending on the truck and don't want to spend a bunch of $$$$ before it goes to a new owner
Post Fiend
Joined: Oct 2003
Posts: 5,903
Likes: 1
From: MICHIGAN
Check or Replace the RAB sensor on the top of the rear axle. It's a VSS too and the tranny relies on its signal to determine shift points. Sometimes just removing it and cleaning the crud off it will do. Ask for a Rear Antilock Brake Sensor if you need to replace it. Oh ya, check the connector for dirty, bent pins/sockets.
Postmaster
Joined: Mar 2001
Posts: 4,968
Likes: 3
From: So Cal
If the OD light flashes then it has probably stored a code. Get the code read and post it. Having the code eliminates a lot of guesswork.
Some readers can't handl tranny codes so find someone who can read them. I know AAMCO will read them for free. I think Autozone can read codes but not sure if they handle tranny codes.
Good Luck,
Jim Henderson
Some readers can't handl tranny codes so find someone who can read them. I know AAMCO will read them for free. I think Autozone can read codes but not sure if they handle tranny codes.
Good Luck,
Jim Henderson
Junior User
Joined: May 2006
Posts: 81
Likes: 0
From: New Jersey - SOUTHERN
my light started blinking as well. I took it to a trans shop to have them read the light and my error code was a detection of slippage...which equals rebuild time. You could have something as simple as a VSS (speed sensor error) or a solenoid problem, but if you have a problem like mine and keep driving, your just going to ruin your tranny even further. Get it looked at now before you blow somthing up and cost yourself twice as much in repairs!!!!!!!!
Lead Driver
Joined: Nov 2003
Posts: 6,900
Likes: 3
From: Campbell River, B.C.
Originally Posted by 66f14evr
Ive been having a problem with my O/D.My 95 F250 4x4 7.3 auto.The off lite starts flashing on the shift lever after about 2 hours of driving and I lose my o/d.And this makes my truck go from 1800rpm up to 2500rpm and this is no fun on the highway.Any ideas please as I have a deal pending on the truck and don't want to spend a bunch of $$$$ before it goes to a new owner
It turned out to be a nicked 3-4 shift valve (stickng at higher temperatures), took a long time to figure it out, but the fix was very easy, all is well now.
