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Old 11-04-2012, 11:15 PM
Alex15 Alex15 is offline
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Default Tranny problems

Hey I have a 1997 xlt 4x4 4.0L automatic trans. When I put it in drive or reverse the rpms will drop and the truck starts to lurch, but when I'm in neutral or park it idles fine, help would be awesome!
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Old 11-25-2012, 06:54 PM
Stohrm Stohrm is offline
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Quote:
Originally Posted by Alex15
Hey I have a 1997 xlt 4x4 4.0L automatic trans. When I put it in drive or reverse the rpms will drop and the truck starts to lurch, but when I'm in neutral or park it idles fine, help would be awesome!
I will be interested in the posts you get. I just bought a 2000 4x4 auto and it does the same thing. It's like the torque converter is engaging when it shouldn't?
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Old 11-25-2012, 11:13 PM
Alex15 Alex15 is offline
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Default Re: Tranny problems

Yeah that's exactly what it's like, I'm taking it into the shop on Friday so I can let you know what the problem is
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Old 11-27-2012, 08:36 AM
Stohrm Stohrm is offline
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Quote:
Originally Posted by Alex15
Yeah that's exactly what it's like, I'm taking it into the shop on Friday so I can let you know what the problem is
So I think I may have found my issue. If you turn off heat/ac on/off to off the truck quits surging. Maybe the clutch assy on the AC is doing something weird. I will be interested to see what you find. THX
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Old 11-29-2012, 06:37 AM
L-W L-W is offline
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Question Re: Tranny problems

Just wondering if anyone resolved this issue. I have a "new to me" 99 B2500. It shows exactly the same symptoms.
lw
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Old 11-29-2012, 06:42 AM
djfllmn djfllmn is offline
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Default Re: Tranny problems

Quote:
Originally Posted by Alex15 View Post
Hey I have a 1997 xlt 4x4 4.0L automatic trans. When I put it in drive or reverse the rpms will drop and the truck starts to lurch, but when I'm in neutral or park it idles fine, help would be awesome!
thats what happens when you shift an auto trans into gear.....the RPMs drop and you can feel the truck move a little if your foot isnt pushing the brake hard enough
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Old 12-04-2012, 07:40 AM
Stohrm Stohrm is offline
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Originally Posted by djfllmn

thats what happens when you shift an auto trans into gear.....the RPMs drop and you can feel the truck move a little if your foot isnt pushing the brake hard enough
Understood, my problem is either the air control valve or the clutch on my AC is going out per my mechanic. I don't want to spend the $$$ now, so I just turn off the heater when I'm at idle. Why does the AC clutch engage when I have my heater on?
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Old 12-04-2012, 01:58 PM
danderson danderson is offline
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Default Re: Tranny problems

From what I understand, some vehicles are designed to turn the AC on with the heater, which can cause your RPM's to jump and then go down. My Ranger XLT 4x4 (2000) AT does this too.
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