Re: 93 Cummins trans slips in and out of overdrive
[Re: Rhinodart]
#1448562
06/06/13 07:56 PM
06/06/13 07:56 PM
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Joined: Jan 2003
Posts: 4,616 Kissimmee Fl.
dusturbd340W5
master
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master
Joined: Jan 2003
Posts: 4,616
Kissimmee Fl.
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could be a TPS problem or a OD sol problem VSS problem or internal pressure problem. Would have to put it on a scanner and look at data to see what's going on.
70 duster full chassis super pro 416 CNC Indybrock heads 727 w/brake
best so far 1.212 60 6.219 in 1/8 at 110.88 9.768 at 137.81 1/4
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Re: 93 Cummins trans slips in and out of overdrive
[Re: pinkduster]
#1448565
06/06/13 08:19 PM
06/06/13 08:19 PM
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Joined: Nov 2004
Posts: 6,653 Near Reading PA USA
pinkduster
master
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master
Joined: Nov 2004
Posts: 6,653
Near Reading PA USA
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Quote:
Simply unplug it and plug it back in again. This might be a quick "on the road" fix for you and has worked for me MANY times. I assume the slightest bit of green stuff type corrosion can mess up the signal. Sometimes just striking a new connection can clear it up. Sometimes you have to use spray electric parts cleaner and dielectric grease to get it working properly again.
By "it" I mean the TPS.
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Re: 93 Cummins trans slips in and out of overdrive
[Re: jimbob101]
#1448568
06/07/13 06:55 PM
06/07/13 06:55 PM
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Joined: Jan 2003
Posts: 43,603 Round Lake Beach, Illinoisy
Rhinodart
OP
Rhinotruck
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OP
Rhinotruck
Joined: Jan 2003
Posts: 43,603
Round Lake Beach, Illinoisy
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Stopped for dinner at the Crackhead Barrel and unhooked the connector to the TPS three times. Just got back from the last 1,000 miles and the overdrive worked flawlessly! If only I would have checked here for the first 2,000 miles... My right foot was cramped-up good trying to get 65 MPH out of the truck with no OD.
The funny thing about science is that if you change one miniscule parameter you change the entire outcome to the way you want it.
JB Rhinehart, Realist
A-Body's RULE!
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Re: 93 Cummins trans slips in and out of overdrive
[Re: Rhinodart]
#1448569
06/07/13 09:03 PM
06/07/13 09:03 PM
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Joined: Nov 2004
Posts: 6,653 Near Reading PA USA
pinkduster
master
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master
Joined: Nov 2004
Posts: 6,653
Near Reading PA USA
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Quote:
Stopped for dinner at the Crackhead Barrel and unhooked the connector to the TPS three times. Just got back from the last 1,000 miles and the overdrive worked flawlessly! If only I would have checked here for the first 2,000 miles... My right foot was cramped-up good trying to get 65 MPH out of the truck with no OD.
Nice! 65 mph out of one of these trucks without OD is nuts! It must have been screamin'. Your nerves must be shot! I can't stand driving mine without OD. If it starts to act up, I pull over IMMEDIATELY and unplug it and plug it back in.
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Re: 93 Cummins trans slips in and out of overdrive
[Re: Rhinodart]
#1448573
06/08/13 02:01 AM
06/08/13 02:01 AM
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Joined: Jan 2003
Posts: 12,043 State of Confusion
hp383
Just a normal tag again
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Just a normal tag again
Joined: Jan 2003
Posts: 12,043
State of Confusion
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My 93 had the potentiometer conversion done.
I liked it, never had any trouble with it. I also liked having the ability to sdjust when the OD would engage.
If you do the swap, just remember a tiny adjustment on the know is all you need to move the OD engage speed. No need to do any real cranking of the dial.
Also as mentioned keep an eye on the VSS, and the plug in connector. These too will cause you to lose OD, but usually the speedo will either not register, or will bounce around if this is the problem.
My 93 went through 2 new VSS units in as many years.
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