4r100
Cargo Master
Joined: Nov 2005
Posts: 2,766
Likes: 56
From: East Tawas, MI
Lil more info.
Truck chipped?
When you hammer it does it down shift?
What speed are you observing this?
Trans fluid level and last service?
Inquiring minds need this stuff to help Inquiring minds
Truck chipped?
When you hammer it does it down shift?
What speed are you observing this?
Trans fluid level and last service?
Inquiring minds need this stuff to help Inquiring minds
Thread Starter
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New User
Joined: Mar 2018
Posts: 2
Likes: 0
truck is not chipped. It doesn't downshift when hammered on and speed wise probably 40mph and up. Fluid level was full and don't remember last service
Cargo Master
Joined: Nov 2005
Posts: 2,766
Likes: 56
From: East Tawas, MI
Are you pouring heavy exhaust when you hammer it?
My truck is chipped and above 57ish, it won't down shift but it rolls coal and takes right off. An unchipped truck will do this as well (mine did before chipping at lower mph). Not sayining it's healthy but you can try to drop a gear (carefully, manually) and see if it drops a gear. If it does, that's a big clue.
What does your tach read at say 45 and if you throttle heavy, does the needle bounce or just lazily climb?
Denny
My truck is chipped and above 57ish, it won't down shift but it rolls coal and takes right off. An unchipped truck will do this as well (mine did before chipping at lower mph). Not sayining it's healthy but you can try to drop a gear (carefully, manually) and see if it drops a gear. If it does, that's a big clue.
What does your tach read at say 45 and if you throttle heavy, does the needle bounce or just lazily climb?
Denny
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