4R100 line pressure problem
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8th Gear
Joined: Sep 2012
Posts: 8
Likes: 7
From: Maple valley
4R100 line pressure problem
I have a 1999 f350 7.3 4x4 with about 115k miles. I had an overheated transmission going from Las Cruces to Los Lunas a couple weeks ago. Basically a low grade 200 mile trip gaining about 3000ft in elevation. I limped home, did a atf and filter change and everything seamed great. Now, I am losing line pressure from a start up of about 60 psi and WOT of about 240. After about 5 minutes I loose pressure slowly to zero. I then can restart the truck and pressure returns to 60psi, then once again it falls. I was thinking a stuck open EPC solenoid, any other ideas before I start spending money?
Lead Driver
Joined: Jul 2017
Posts: 6,864
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From: WV
For future readers, adding link to other thread by OP where Mark stops by for assistance.
https://www.ford-trucks.com/forums/1...l#post21535028
https://www.ford-trucks.com/forums/1...l#post21535028
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