ieatcamaros
New Member
- Joined
- Aug 7, 2007
- Messages
- 9
- Reaction score
- 0
- Points
- 0
The truck I have is a 2000 4.0 auto 2wd. I think I have the 4R55E trans since it is a 4 speed. I have consulted the Haynes, but I am sure you know where that got me.
The problem is very intermittent. When cruising between 45mph and 50mph, the truck jerks hard for a split second. Almost like getting hit from behind by another car. I noticed that when accelerating, the truck shifts about that speed. That is depending upon how hard it is accelerating, of course It has done this a total of about 5 times in the last three weeks. I drive about 200-250 miles per week. This truck does have 163K on it and I have only owned it since November.
So just yesterday I was driving home and I turned off one street which I was driving about 40 before slowing down to turn left onto another street which the speed limit is 35. Anyway, I don't know what gear the trans was in, but when I went to accelerate(not hard) the trans stayed in whatever gear it was in. It was at least third but I think it was in OD because it was lame acceleration compared to normal. When it did this, I pushed harder on the accelerator and then it downshifted like it is supposed to. So this has got me thinking that these two issues are related and whatever controls shifting on this transmission is at fault. Can someone tell me what controls the shifting on this trans? Or if you think it is something else, I am open to suggestion.
The best I can tell this truck has a lockup torque converter. Right? I don't know too much about automatic transmissions but I do know that the older ones used a modulator valve to shift and these new ones don't. I am more of a manual transmission type of guy (just for reasons like this), but I just could not pass up the deal on this truck.
**Edit** The "TR" code on my door jamb is D.
The problem is very intermittent. When cruising between 45mph and 50mph, the truck jerks hard for a split second. Almost like getting hit from behind by another car. I noticed that when accelerating, the truck shifts about that speed. That is depending upon how hard it is accelerating, of course It has done this a total of about 5 times in the last three weeks. I drive about 200-250 miles per week. This truck does have 163K on it and I have only owned it since November.
So just yesterday I was driving home and I turned off one street which I was driving about 40 before slowing down to turn left onto another street which the speed limit is 35. Anyway, I don't know what gear the trans was in, but when I went to accelerate(not hard) the trans stayed in whatever gear it was in. It was at least third but I think it was in OD because it was lame acceleration compared to normal. When it did this, I pushed harder on the accelerator and then it downshifted like it is supposed to. So this has got me thinking that these two issues are related and whatever controls shifting on this transmission is at fault. Can someone tell me what controls the shifting on this trans? Or if you think it is something else, I am open to suggestion.
The best I can tell this truck has a lockup torque converter. Right? I don't know too much about automatic transmissions but I do know that the older ones used a modulator valve to shift and these new ones don't. I am more of a manual transmission type of guy (just for reasons like this), but I just could not pass up the deal on this truck.
**Edit** The "TR" code on my door jamb is D.
Last edited: