E40D Shifting issues when warm
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E40D Shifting issues when warm
97 f250 HD 7.5 gas 4x4 Manual Locking hubs and transfer case
No codes, New PCM less than 20 miles on it
Fresh Reman trans
Truck has a slight harder shift from 1st to 2nd only when warm.
Also under hard acceleration (Over 1/2 throttle) Trans slips big time, again only when warm.
Truck drives and shifts great when cold..
I'm thinking fluid is getting too thin when warm.
Possibly too close to headers causing heat soaking issues?
Lines run next to headers, like 1" away.
No trans temp gauge
Thoughts?
No codes, New PCM less than 20 miles on it
Fresh Reman trans
Truck has a slight harder shift from 1st to 2nd only when warm.
Also under hard acceleration (Over 1/2 throttle) Trans slips big time, again only when warm.
Truck drives and shifts great when cold..
I'm thinking fluid is getting too thin when warm.
Possibly too close to headers causing heat soaking issues?
Lines run next to headers, like 1" away.
No trans temp gauge
Thoughts?
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,725
Likes: 2,652
From: SE Florida
It's not likely that the fluid is getting too thin unless you're getting the transmission way over 300°F. And I doubt that you are.
Either it is a PCM that isn't right for that engine/trans combo, or something is wrong inside the transmission.
Either it is a PCM that isn't right for that engine/trans combo, or something is wrong inside the transmission.
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If it was something PCM related wouldn't it shift the same way when its cold?
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Changed the fluid and filter and issue persists
Trans sounds like its "grinding gears" above 3,250 rpm
I believe guy who sold it to me lied about the reman trans and faked the invoices.
Is trans toast?
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trans starts slipping only after first time it gets up to speed no matter cold or warm
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