How to tell when a TC suddenly dies? - Ford Powerstroke Diesel Forum

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post #1 of 11 Old 11-03-2010, 05:06 AM Thread Starter
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How to tell when a TC suddenly dies?

On the way home last night & everything was fine, then under mild acceleration, nothing. just like I had put it in neutral. no noises or anything. I didn't even have the radio on (just listening to the turbo). Came to a halt and I had no gears. Not even a hint of 1st, reverse, nothing.... tranny fluid is still excellent from the recent change (few weeks ago & thousand or so miles). Fluid temp was right at 128... rather cool early this morning.
Keeping in mind I had a shudder in the driveline for quite some time now (seemingly from the weak TC as well as the feeling of a manual transmission with a worn out clutch ), I'm still leaning to a TC gone by the way side. Any thoughts? how is the best way to tell when the TC is definetly a gonner?
Prior to this, I have had no issues with the tranny, great firm shifts, no common issues...
I have an OTC Nemisys OBDII reader and it shows every shift solenoid to be working, but shows the TCC to never lock, always staying in the 'off' position. I took a screen shot of the data and will try to post it later.

So, I certainly appreciate any thoughts and suggestions/knowledge from you tranny experts out there. This one has me mighty curious.


2000 F350 SRW Lariat 4x4 CC
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post #2 of 11 Old 11-03-2010, 09:10 AM Thread Starter
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attached is a screen chot from the ODBII reader. Anyone have any thoughts?
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2000 F350 SRW Lariat 4x4 CC
300k + miles & just 'broken in'
7.3 L basically stock, best diesel truck I've ever owned!
Bunch of Alpine, MB Quart, JL Audio, Precision Power stereo stuff & Remote Start
4" Stainless Exhaust (turbo-back & straight pipe)
Airaid intake
Shackle leveling kit & factory U/B Springs
Rancho RS9000XL shocks
B&W Gooseneck Hitch
35x12.50 Goodyear Wrangler MT/R's
Ranch Hand Brush Guard
Toolbox & bed full of misc junk
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post #3 of 11 Old 11-03-2010, 05:24 PM
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is this screen shot before or after the "no go",quit pulling.
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post #4 of 11 Old 11-03-2010, 05:52 PM Thread Starter
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this was after the fact, sitting on the road side waiting for my tow vehicle.

2000 F350 SRW Lariat 4x4 CC
300k + miles & just 'broken in'
7.3 L basically stock, best diesel truck I've ever owned!
Bunch of Alpine, MB Quart, JL Audio, Precision Power stereo stuff & Remote Start
4" Stainless Exhaust (turbo-back & straight pipe)
Airaid intake
Shackle leveling kit & factory U/B Springs
Rancho RS9000XL shocks
B&W Gooseneck Hitch
35x12.50 Goodyear Wrangler MT/R's
Ranch Hand Brush Guard
Toolbox & bed full of misc junk
jmt1975 is offline  
post #5 of 11 Old 11-03-2010, 06:07 PM
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When you put it in D or R from P, does the motor lug down at all like its been put in gear?

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post #6 of 11 Old 11-03-2010, 06:29 PM Thread Starter
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nope... barely even makes RPM change, which is due to the electronics. the OTC scan tool shows the shift solenoids all opening & closing and going in gear. I just think there is no power being given to the transmission at all. Like it's in PARK.

2000 F350 SRW Lariat 4x4 CC
300k + miles & just 'broken in'
7.3 L basically stock, best diesel truck I've ever owned!
Bunch of Alpine, MB Quart, JL Audio, Precision Power stereo stuff & Remote Start
4" Stainless Exhaust (turbo-back & straight pipe)
Airaid intake
Shackle leveling kit & factory U/B Springs
Rancho RS9000XL shocks
B&W Gooseneck Hitch
35x12.50 Goodyear Wrangler MT/R's
Ranch Hand Brush Guard
Toolbox & bed full of misc junk
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post #7 of 11 Old 11-03-2010, 06:38 PM
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Yeah, but it sounds more like it may be in gear, just not engaging, kinda like what it does when your coasting...

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| 1.6 EcoBoost | 6-Speed Manual | The basics and some goodies |
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post #8 of 11 Old 11-03-2010, 06:46 PM Thread Starter
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yes, but no.. there is not one hint of movement in any gear in any way. has anyone evenr heard of a TC tearing up to the point where the clutch disks dont engage at all?

2000 F350 SRW Lariat 4x4 CC
300k + miles & just 'broken in'
7.3 L basically stock, best diesel truck I've ever owned!
Bunch of Alpine, MB Quart, JL Audio, Precision Power stereo stuff & Remote Start
4" Stainless Exhaust (turbo-back & straight pipe)
Airaid intake
Shackle leveling kit & factory U/B Springs
Rancho RS9000XL shocks
B&W Gooseneck Hitch
35x12.50 Goodyear Wrangler MT/R's
Ranch Hand Brush Guard
Toolbox & bed full of misc junk
jmt1975 is offline  
post #9 of 11 Old 11-03-2010, 08:12 PM
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I personally have not

Sr. Engineering Tech/OPS Technician @ Your local cable company.
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post #10 of 11 Old 11-04-2010, 01:39 PM
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"after the fact." I don't see how that is possible. The computer cannot command shift solenoids on while sitting still. The tc should be off at idle.
The tc clutch does not engage untill moveing speed. If the clutch was not operative at all, the vehicle will still move.
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