tranny slipping?
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Mountain Pass
Joined: Sep 2003
Posts: 143
Likes: 0
From: So Cal
tranny slipping?
The issue is repeatable... on the freeway doing ~65mph and going up a mild grade while trying to accelerate moderatly the truck tries to down shift from 6th to 5th and it jumps back and forth between the two gears.
Is the tranny just slipping? Whats the deal? Have not taken it in yet but I will. Just want to hear what you guys have to say first so I have proper ammunition.
Is the tranny just slipping? Whats the deal? Have not taken it in yet but I will. Just want to hear what you guys have to say first so I have proper ammunition.
Cargo Master
Joined: Apr 2003
Posts: 2,059
Likes: 426
From: Too close to Houston
Let me guess, 3.73 ratio and tall tires?
Do you have a 6-speed auto? I've been out of touch too long. I though the new tranny was a 5-speed. If it's a 5-speed, you may be mistaking the torque converter lock-up for a 5th shift.
Your transmission is "hunting". It's perfectly normal. When you get in this situation (not enough torque for high gear, too much for the lower gear) the correct action is to manually downshift out of the higher gear and let your truck climb the hill. You can put it back into overdrive or whatever once the terrain flattens out. Allowing the tranny to hunt will cause excessive heat and premature wear. This is covered in the manual that came in your glovebox.
Or you can spend big $$$ and install lower gears in your differential(s).
Do you have a 6-speed auto? I've been out of touch too long. I though the new tranny was a 5-speed. If it's a 5-speed, you may be mistaking the torque converter lock-up for a 5th shift.
Your transmission is "hunting". It's perfectly normal. When you get in this situation (not enough torque for high gear, too much for the lower gear) the correct action is to manually downshift out of the higher gear and let your truck climb the hill. You can put it back into overdrive or whatever once the terrain flattens out. Allowing the tranny to hunt will cause excessive heat and premature wear. This is covered in the manual that came in your glovebox.
Or you can spend big $$$ and install lower gears in your differential(s).
Last edited by Sport45; Apr 4, 2006 at 09:58 AM.
Thread Starter
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Mountain Pass
Joined: Sep 2003
Posts: 143
Likes: 0
From: So Cal
The situation was far from normal...35,000 and it has never done it before.
Correct about the ratio and 6" lift but it ended up being the EGR valve sticking so they swapped it out and the issue went away...
Correct about the ratio and 6" lift but it ended up being the EGR valve sticking so they swapped it out and the issue went away...
