TRANS SHIFTING ISSUE AFTER CONVERTER INSTALL - Ford Powerstroke Diesel Forum
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post #1 of 14 Old 01-27-2013, 09:47 AM Thread Starter
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TRANS SHIFTING ISSUE AFTER CONVERTER INSTALL

Hey had the typical rattling torque converter on my 99 7.3 stock trans... 70k miles.. Im running an edge evolution tuner and a bd pressure lock as recommended years back....it does lock the converter in 3rd. My issue now after installing a multi disk converter on my first trip pulling my fifth wheel I would kick the OD off like normal entering the grade and typically it would run the grades great in 3rd gear lock up at any throttle setting... But strangly now it will while in 3gear hunt like go in and out of lockup acting almost like a downshift up and down to the point where I have to slow and put it into 2nd gear.... I simply slide a new converter on and refilled with new fluid... Nothing else changed!!! Stock trans... Same programmer.... For now I disconnected the bd pressure loc now there's no lock up at all....
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post #2 of 14 Old 01-28-2013, 11:45 AM
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Originally Posted by frankoholic78 View Post
Hey had the typical rattling torque converter on my 99 7.3 stock trans... 70k miles.. Im running an edge evolution tuner and a bd pressure lock as recommended years back....it does lock the converter in 3rd. My issue now after installing a multi disk converter on my first trip pulling my fifth wheel I would kick the OD off like normal entering the grade and typically it would run the grades great in 3rd gear lock up at any throttle setting... But strangly now it will while in 3gear hunt like go in and out of lockup acting almost like a downshift up and down to the point where I have to slow and put it into 2nd gear.... I simply slide a new converter on and refilled with new fluid... Nothing else changed!!! Stock trans... Same programmer.... For now I disconnected the bd pressure loc now there's no lock up at all....
Just want to start with the basics- did you reconnect the pressure loc & disconnect the Edge tuner to see if it made a difference? As far as upgrading your TC with a multi-disc, have you also upgraded your valve body or a reprogramming kit for the accumulator? When you upgrade the TC only, the valve body & the accumulator should be ugraded as well. It's nice having a good TC, but will not react the same as a stock piece would without proper modifications.

"HEAVY" 2001 F-250 XLT 4x4 EC SB:
TW 6pos chip, S&B CAI, Monster 4" exhaust w/ Power Elbow, Big Head WGA, Technicooler, ITP boost fooler, Gen 1 Wicked Wheel, Six-Gun Tuner, Optima Yellow Tops, AutoMeter(Boost, Trans, EGT), CCV mod, MTS TC, MTS valve body, Trans Tech performance rebuild kit, TransGo shift kit, Hornblasters 242 Shocker Train Horns.


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post #3 of 14 Old 01-28-2013, 11:53 AM Thread Starter
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Originally Posted by RadarRider View Post
Just want to start with the basics- did you reconnect the pressure loc & disconnect the Edge tuner to see if it made a difference? As far as upgrading your TC with a multi-disc, have you also upgraded your valve body or a reprogramming kit for the accumulator? When you upgrade the TC only, the valve body & the accumulator should be ugraded as well. It's nice having a good TC, but will not react the same as a stock piece would without proper modifications.
I did try running it without the pressure loc and was ok since it won't go into lockup in 3rd with out it...... The rest of the trans in stock.... I just installed the converter due to noise.....
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post #4 of 14 Old 01-28-2013, 11:58 AM
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I did try running it without the pressure loc and was ok since it won't go into lockup in 3rd with out it...... The rest of the trans in stock.... I just installed the converter due to noise.....
Gotcha. But the TC you installed isn't OEM, right? What kind of TC is it exactly?

"HEAVY" 2001 F-250 XLT 4x4 EC SB:
TW 6pos chip, S&B CAI, Monster 4" exhaust w/ Power Elbow, Big Head WGA, Technicooler, ITP boost fooler, Gen 1 Wicked Wheel, Six-Gun Tuner, Optima Yellow Tops, AutoMeter(Boost, Trans, EGT), CCV mod, MTS TC, MTS valve body, Trans Tech performance rebuild kit, TransGo shift kit, Hornblasters 242 Shocker Train Horns.


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post #5 of 14 Old 01-28-2013, 12:00 PM Thread Starter
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Gotcha. But the TC you installed isn't OEM, right? What kind of TC is it exactly?
https://racerxusa.com/product_info.php?products_id=295
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post #6 of 14 Old 01-28-2013, 12:06 PM
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Ah! That makes more sense! What kind of ATF are you using?

"HEAVY" 2001 F-250 XLT 4x4 EC SB:
TW 6pos chip, S&B CAI, Monster 4" exhaust w/ Power Elbow, Big Head WGA, Technicooler, ITP boost fooler, Gen 1 Wicked Wheel, Six-Gun Tuner, Optima Yellow Tops, AutoMeter(Boost, Trans, EGT), CCV mod, MTS TC, MTS valve body, Trans Tech performance rebuild kit, TransGo shift kit, Hornblasters 242 Shocker Train Horns.


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post #7 of 14 Old 01-28-2013, 12:12 PM Thread Starter
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Originally Posted by RadarRider View Post
Ah! That makes more sense! What kind of ATF are you using?
Mercon V I have been running that for quit a few years since it was recommended by a trans shop when my old converter was shuddering going into 4th gear lock up... After that I got the tuner which seemed to dial in the lock up problem...
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post #8 of 14 Old 01-28-2013, 12:23 PM
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Originally Posted by frankoholic78 View Post
Mercon V I have been running that for quit a few years since it was recommended by a trans shop when my old converter was shuddering going into 4th gear lock up... After that I got the tuner which seemed to dial in the lock up problem...
Here's the deal about MERCON V & the early 4R100s: MERCON V was recommended in all transmissions, via a Ford Bulletin back in 2006. The big thing they didn't take into account is the lighter-duty coaster drum most early 4R100s & all E4ODs have. I'll bet if you upgraded the coaster drum/assembly to the heavier-duty units found in '01-'03 4R100s, you wouldn't have a problem with the new TC. The TC will give you slightly higher line pressure than a completely stock TC will have. It'll change the characteristics of the transmission & it's performance. The thing that sucks about this is, the coaster's cheap(about $90), but if you can't take the trans out yourself, it'll have to go to a trans shop.

"HEAVY" 2001 F-250 XLT 4x4 EC SB:
TW 6pos chip, S&B CAI, Monster 4" exhaust w/ Power Elbow, Big Head WGA, Technicooler, ITP boost fooler, Gen 1 Wicked Wheel, Six-Gun Tuner, Optima Yellow Tops, AutoMeter(Boost, Trans, EGT), CCV mod, MTS TC, MTS valve body, Trans Tech performance rebuild kit, TransGo shift kit, Hornblasters 242 Shocker Train Horns.


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post #9 of 14 Old 01-28-2013, 12:32 PM Thread Starter
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Originally Posted by RadarRider View Post
Here's the deal about MERCON V & the early 4R100s: MERCON V was recommended in all transmissions, via a Ford Bulletin back in 2006. The big thing they didn't take into account is the lighter-duty coaster drum most early 4R100s & all E4ODs have. I'll bet if you upgraded the coaster drum/assembly to the heavier-duty units found in '01-'03 4R100s, you wouldn't have a problem with the new TC. The TC will give you slightly higher line pressure than a completely stock TC will have. It'll change the characteristics of the transmission & it's performance. The thing that sucks about this is, the coaster's cheap(about $90), but if you can't take the trans out yourself, it'll have to go to a trans shop.
Ah. Got ya... I also remember a conversation with the gentleman at racer x about the fact that I should remove the pressure loc anyways because of line pressure issues now... Or I think he said the pressure loc's were for older models? I wondered if I was gonna have to upgrade more stuff... Valve body ect. Or a better tuner to control shifts and lock up
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post #10 of 14 Old 01-28-2013, 12:49 PM
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Originally Posted by frankoholic78 View Post
Ah. Got ya... I also remember a conversation with the gentleman at racer x about the fact that I should remove the pressure loc anyways because of line pressure issues now... Or I think he said the pressure loc's were for older models? I wondered if I was gonna have to upgrade more stuff... Valve body ect. Or a better tuner to control shifts and lock up
Yeah, usually if when it comes to the trans- when you upgrade 1 area, you'll need to upgrade all key areas afterward. I'd look into a valve body upgrade for starters & then, since you tow, I'd also look into a reprogramming kit(shift kit) for your accumulator. Like you've also said, look into some good custom tunes for your next chip/programmer. It'll make a world of a difference on your trans for optimal shift performance for your upgrades. I'm sure you've heard it here before, but Tony Wildman & DP Tuners are the best bang for your buck, as they can program your trans tunes according to your truck's engine AND trans mods. Like I've said, check your dipstick on your trans & make certain it says MERCON V. I'm 90% sure, by what you're telling me how it's acting, you'll need MERCON.

"HEAVY" 2001 F-250 XLT 4x4 EC SB:
TW 6pos chip, S&B CAI, Monster 4" exhaust w/ Power Elbow, Big Head WGA, Technicooler, ITP boost fooler, Gen 1 Wicked Wheel, Six-Gun Tuner, Optima Yellow Tops, AutoMeter(Boost, Trans, EGT), CCV mod, MTS TC, MTS valve body, Trans Tech performance rebuild kit, TransGo shift kit, Hornblasters 242 Shocker Train Horns.


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