Converter lockup question
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Freshman User
Joined: Mar 2009
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From: Long Island, NY
Converter lockup question
05 CC v10 5R110W
At what point during normal acceleration does the converter lock up? I can only count 5 shift points (RPM Drops). Does it lock during a shift?
At what point during normal acceleration does the converter lock up? I can only count 5 shift points (RPM Drops). Does it lock during a shift?
Former Vendor
Joined: Sep 2000
Posts: 2,627
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From: South Carolina
Locks in OD aka 5th gear in normal driving in Non Tow/Haul mode. In Tow/Haul mode 3,4,5 gears will lock depending on throttle position and Mph.
Transmission Rebuilder
Joined: Jul 2008
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From: North Georgia
If you felt and noticed 5 changes in rpms then you felt the converter at the end of 5th gear.
Remember you started in first, so the first shift you felt was it shifting from 1st to 2nd.
So
1st to 2nd = 1 shift
2nd to 3rd = 2 shifts
3rd to 4th = 3 shifts
4th to 5th = 4 shifts
5th to LU = 5 shifts
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Freshman User
Joined: Mar 2009
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From: Long Island, NY
Ok so I checked it again this morning on the way to work. I can only see 4 shifts. I got up to 65mph 
. Does it have to be at full operating temp or something? How much RPM drop should I see for the TC LU
. Does it have to be at full operating temp or something? How much RPM drop should I see for the TC LU
Former Vendor
Joined: Sep 2000
Posts: 2,627
Likes: 76
From: South Carolina
Thats Ford not using all the gears in their shift strategies. There is also a RPM drop before shift scalar thats normally set to 400-600 in factory form.
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Tuned
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fordmdb: I am not sure exactly how the lockup works, but im pretty sure I have felt mine lockup in 2nd gear. I was going about 45-55 in second gear and i heard lockup and saw the RPM's drop about 300 right as i floored it. If i don't floor it and just steadily increase throttle there is no indication of lockup. I have heard oversized tires have some affect on it and I am running 35's with 3.73 gearing.
Former Vendor
Joined: Sep 2000
Posts: 2,627
Likes: 76
From: South Carolina
Former Vendor
Joined: Sep 2000
Posts: 2,627
Likes: 76
From: South Carolina
fordmdb: I am not sure exactly how the lockup works, but im pretty sure I have felt mine lockup in 2nd gear. I was going about 45-55 in second gear and i heard lockup and saw the RPM's drop about 300 right as i floored it. If i don't floor it and just steadily increase throttle there is no indication of lockup. I have heard oversized tires have some affect on it and I am running 35's with 3.73 gearing.
Your correct on 4R100 trans depending on throttle postion and Mph, 2nd gear can lock. The OP has the 5R110 Torqshift trans. Both have different lock strategies.