Hard shifting 4R100
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New User
Joined: Feb 2004
Posts: 19
Likes: 1
From: nc
Hard shifting 4R100
Having problem with 99 F-250 LD shifting hard from 2nd to 3rd, not all the time though. O.D. light is not flashing and no codes came up when a scan was done. Truck has 115k and fluid has been changed every 30k. Thinking about using Seafoam and a fluid and filter change. Any Ideas??? Thanks in advance.
Senior User
Joined: Jan 2008
Posts: 174
Likes: 0
From: Western Pennsylvania
my 4r70w was shifting a little hard and I put some lucas in it and everything has been fine for 5000 miles. You might want to try that!!! Also, if you have been changing every 30,000 miles, you are getting close to time to change again. change the fluid and put a bottle of lucas in it.
