Transmission Adaptive Learning

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Mar 16, 2015 | 04:53 PM

#16

seville009

Logistics Pro

Joined: Nov 2004

Posts: 4,795

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Quote:

Originally Posted by droldsmorland

Off subject a little as were discussing the 5R110W trans. 6.2 uses the 6R140. How many miles on the fluid and filter and the transmission?

Transmission mileage is about 69,000. I think the fluid was changed around 45,000, but I don't think the filter was changed (not sure off hand; dealer did the work).

Mar 18, 2015 | 09:27 AM

#17

tobyw

Senior User

Joined: Mar 2000

Posts: 358

Likes: 1

From: Tri-Cities, WA

Quote:

Originally Posted by tobyw

Subscribed... I've noticed a few times lately that mine gives a harsh 2-3 shift. Not always, but sometimes...

Quote:

Originally Posted by Mark Kovalsky

Due to the nature of how the 2-3 shift is performed, once in a while you will get a harsh shift. It's releasing a clutch and applying another clutch to make that shift. If one finishes what it's doing more than 0.030 seconds faster than the other one it is going to be a bad shift. It proved to be impossible to make that shift perfect 100% of the time.

Wow, thanks for the info!!

Mar 19, 2015 | 10:42 AM

#18

droldsmorland

Fleet Mechanic

Joined: Nov 2011

Posts: 1,825

Likes: 43

From: Land of Taxes

Quote:

Originally Posted by seville009

Transmission mileage is about 69,000. I think the fluid was changed around 45,000, but I don't think the filter was changed (not sure off hand; dealer did the work).

I change the fluid and filter in an Automatic before or at the recommended intervals. Thats generally around 25K. You need to do it much sooner if you do any repeated heavy towing like 15K IMO...Mine will do a hard 2-3 upshift every so often. I think its the nature of the beast as to how 2-3 upshift is accomplished with this 6R140 trans. Not sure exactly how it does this shift as our resident Engineer (Mark) retired before it came out??? Mark?
I come from the high perf and muscle car world. IMO Id rather have a firm positive shift vs a smooth cushy one. The latter causes frictional heat and will deteriorate the frictions/steels and fluid faster over a firm positive shift.
IMO the 6R140 is superior to the 5R110W. I have not had either one apart yet to comment on how beefy they are internally.

Mar 19, 2015 | 10:58 AM

#19

Mark Kovalsky

Frmr Ford Trans Engr

Joined: Aug 1999

Posts: 24,739

Likes: 2,669

From: SE Florida

The first 6R140 prototype was built on my last day at Ford Motor Company. I didn't go look at it, I had other things to do that day. I don't know much at all about that transmission.

Apr 27, 2015 | 01:54 PM

#20

WK57ABF

Thread Starter

Senior User

Joined: Feb 2009

Posts: 100

Likes: 3

From: Kendal, Cumbria, UK

Update to my original post concerning transmission hard shifting/shuddering/slipping.

While waiting for my transmission issues to heal, I decided to lube the rear drive shaft slip joint. Hells flames what a difference. Early days but after three or four shopping trips and one 20 mile 8000 lbs tow, this is a changed truck. No hard/missed shifts or judders or clunking - it's a miracle. It's so smooth.

Sorry for misleading you guys with a transmission problem when it looks as though it was just the drive shaft.

Thanks, John in the UK

Apr 28, 2015 | 10:05 AM

#21

tobyw

Senior User

Joined: Mar 2000

Posts: 358

Likes: 1

From: Tri-Cities, WA

Would you mind elaborating on how you lubed the slip joint? I have looked under my truck several times, and I don't have a grease fitting anywhere south of the ball joints...

Apr 28, 2015 | 10:38 AM

#22

WK57ABF

Thread Starter

Senior User

Joined: Feb 2009

Posts: 100

Likes: 3

From: Kendal, Cumbria, UK

Hi tobyw,

I dropped the rear drive shaft by removing 4 x 8mm bolts (08 SCLB 6.4). Pulled the yoke off the splines and greased with Motorcraft XG-8.

If you Google or search this forum (Super Duty Yoke Slip Joint) there are dozens of threads on the procedure.

Surprisingly there are no grease fittings as there were on the older trucks.

John in the UK

Apr 28, 2015 | 11:14 AM

#23

droldsmorland

Fleet Mechanic

Joined: Nov 2011

Posts: 1,825

Likes: 43

From: Land of Taxes

Quote:

Originally Posted by tobyw

Would you mind elaborating on how you lubed the slip joint? I have looked under my truck several times, and I don't have a grease fitting anywhere south of the ball joints...

I put a link on the 1st page of this thread on slip spline re-grease^^^