2003 7.3 4R100 issues
I am trying to diagnose and fix trans issues for a 2003 7.3 F250.
I have done a good bit of forum research here, powerstrokearmy, and PSN. I have come up with some helpful info but nothing conclusive. The truck: -2003 7.3 f250 -410,000 miles -Trans rebuilt approx. 3 years ago and Dayco triple disc converter installed -Stock programming/no chip -Beans injectors installed early this year and are stock size Symptoms: -When in D, the truck will not move and will roll back if on a grade. -When manually shifted into 1st the truck will shudder and ease forward like it as if the friction clutches are not totally engaged. -When in R there is a hesitation and then the trans slams hard into gear. -The <acronym title="Over Drive">OD</acronym> light is NOT flashing. -Will not start in D sometimes. Must be shifted into N. -Trans fliud is at appropriate level and looks/smells fine. Codes: P0605: internal ctrl module ROM error - i think this could be related P0733: Gear 3 incorrect ratio - almost certainly related P0541: Manifold intake air heater - i do not think this is related P0476: exh press ctrl valve perform - i do not think thisis related P1780: trans ctrl sw out of range - armost certainly related My plan: -Clear all codes and attempt to drive. See what codes return. -Calibrate the trans range sensor -Check the TSS and OSS sensor and harness. -Check all underhood connections. -Check column shifter wiring for wear. -Drop pan and look for clutch material. -Flush with Cooler Cleaner, change filter and refill. -Check <acronym title="Powertrain Control Module">PCM</acronym> grounds. Ideas/other: -Accumulator related? -Sticky valve? -Sticky solenoid? -PCM not grounded well? -PCM need reflash? -VSS? -If there is slippage, why is there no P1728? I consider the shop that rebuilt the trans to be reputable. They rebuilt the <acronym title="Pre 99 Automatic 4 speed transmission">E4OD</acronym> in my 97 (mods in sig) in 2006, gave me a 3 year warranty and let me watch them rebuild it (just wanted to see how it was done). He upgraded the <acronym title="Pre 99 Automatic 4 speed transmission">E4OD</acronym> with <acronym title="99-2003 7.3L Super Duty Transmission">4R100</acronym> parts. I have since beat the crap out of the trans in my 97 with no issues whatsoever. Please let me know if you see anything I should add/delete/modify in my current plan. <!-- / message --><!-- sig --> |
Originally Posted by Goober1979
(Post 13860610)
-When in D, the truck will not move and will roll back if on a grade.
Originally Posted by Goober1979
(Post 13860610)
-When manually shifted into 1st the truck will shudder and ease forward like it as if the friction clutches are not totally engaged.
Originally Posted by Goober1979
(Post 13860610)
-When in R there is a hesitation and then the trans slams hard into gear.
Originally Posted by Goober1979
(Post 13860610)
-Will not start in D sometimes. Must be shifted into N.
Lay under the dash looking up the steering column. There are two #30 Torx head bolts that hold the shift cable bracket to the shift tube.
Originally Posted by Goober1979
(Post 13860610)
P0605: internal ctrl module ROM error - i think this could be related
Originally Posted by Goober1979
(Post 13860610)
P0733: Gear 3 incorrect ratio - almost certainly related
Originally Posted by Goober1979
(Post 13860610)
P0541: Manifold intake air heater - i do not think this is related
Originally Posted by Goober1979
(Post 13860610)
P0476: exh press ctrl valve perform - i do not think thisis related
Originally Posted by Goober1979
(Post 13860610)
P1780: trans ctrl sw out of range - armost certainly related
Originally Posted by Goober1979
(Post 13860610)
-Clear all codes and attempt to drive. See what codes return.
Originally Posted by Goober1979
(Post 13860610)
-Calibrate the trans range sensor
Originally Posted by Goober1979
(Post 13860610)
-Check the TSS and OSS sensor and harness.
Originally Posted by Goober1979
(Post 13860610)
-Check all underhood connections.
Originally Posted by Goober1979
(Post 13860610)
-Check column shifter wiring for wear.
Originally Posted by Goober1979
(Post 13860610)
-Drop pan and look for clutch material.
Originally Posted by Goober1979
(Post 13860610)
-Flush with Cooler Cleaner, change filter and refill.
Originally Posted by Goober1979
(Post 13860610)
-Check <acronym title="Powertrain Control Module">PCM</acronym> grounds.
Originally Posted by Goober1979
(Post 13860610)
-Accumulator related?
Originally Posted by Goober1979
(Post 13860610)
-Sticky valve?
Originally Posted by Goober1979
(Post 13860610)
-Sticky solenoid?
Originally Posted by Goober1979
(Post 13860610)
-PCM not grounded well?
Originally Posted by Goober1979
(Post 13860610)
-PCM need reflash?
Originally Posted by Goober1979
(Post 13860610)
-VSS?
Originally Posted by Goober1979
(Post 13860610)
-If there is slippage, why is there no P1728?
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Ok. Here is a an update. Took it to the trans shop that did the original rebuild. He pulled it apart and it turns out that the center support "exploded" (his term). The "explosion" took out the front drum and poluted the pump with debris. The center support was the upgraded roller bearing type. All the clutches look good. So, my questions are:
-As far as keeping this from happening aain in the future, I assume an beefier center support like the one from Suncoast. Is that the one to go with? Are there better options? -Is beefing up the center support the solution or could thius failure be the result of some other part/system? |
Originally Posted by Goober1979
(Post 13957293)
Ok. Here is a an update. Took it to the trans shop that did the original rebuild. He pulled it apart and it turns out that the center support "exploded" (his term). The "explosion" took out the front drum and poluted the pump with debris. The center support was the upgraded roller bearing type. All the clutches look good. So, my questions are:
-As far as keeping this from happening aain in the future, I assume an beefier center support like the one from Suncoast. Is that the one to go with? Are there better options? -Is beefing up the center support the solution or could thius failure be the result of some other part/system? It looks like the SunCoast part has the upgraded hub, matching shaft, support ring and I presume a machined center support. If so, then it's a nice upgrade that you should consider. Also want to check the case to make sure it didn't get damaged when the center support failed. |
Great trans info here guys TX Mark and Snakebite. The only thing one could possibly add to this is very general and directed at the guys who have never had a trans apart or dont have any idea on general operating theory. Fear of The Big Black Box.
Simply put its a big hydraulic pump with seals and sealing surfaces. Any leaks and you have a problem. The first step(S) should be a pressure check. If its a new school trans then a code check goes with that. Those two basic troubleshooting steps will generally find most if not all trans problems or at least narrow down the problem. Those results will generally tell you what the next step is. That will generally be ancillary part failure such as solenoids & senders etc...If that doesn't do it the next step is a tear down and inspection to find the carnage. |
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