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  #1  
Old 07-26-2012, 08:12 PM
04ramjmm 04ramjmm is offline
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Default transmission trouble

Hi i have a 1500 2x4 3.7 automatic that my wife and i bought new off the show room floor. I changed the trans fluid about a yr ago. Ever since then the trans acts funny. When its cold it takes it a min for it to go into gear. But after its warmed up there seems to be no problem . Can someone give me an idea what the heck is the problem. I love my truck and never had a problem with it. Hope fully some one out there in ram world can help. Thanks john.
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Old 07-26-2012, 11:12 PM
crazychevy88 crazychevy88 is offline
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how many miles were on it when you first changed the fluid? when I worked in a shop, if a vehicle was passed its recomended interval (anywhere between 25 and 50k) we wouldn't touch the trans fluid. Apparently if it wasn't kept up on regularly, changing the fluid and filter could do more harm than good.
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Old 07-29-2012, 08:21 AM
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Sounds like converter drainback.
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Old 08-23-2012, 10:46 PM
Oldy but goodie Oldy but goodie is offline
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There a couple of things that come to mind. incorrect fluid or type or in some cases it may need an additive to operate properly. Check your manual to insure you used proper fluid and type. Check with dealer to see if they advise any additives.
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Old 08-29-2012, 08:40 PM
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Converter drainback sounds right to me as well. There's a ball-type checkvalve in the transmission return line. It's bad about corroding and restricting transmission fluid. It was put there in from the mid-90's to help prevent converter drainback, however when they corrode shut, they fry transmissions, and if they stick open you get drainback (trans service may have shaken some speck of debris loose and jammed the valve).
Try this. Next time you start up (cold start after sitting overnight), put into neutral immediately after starting, for about 5 seconds. Then put in Reverse or Drive, doesn't matter. If it engages normally, converter drainback is the problem (converter charges in R, N, or D, D1, D2, not in Park). If so, at least get that anti-drainback valve replaced. Me, I'd remove the valve and fix the problem with an aftermarket valvebody shift kit from Superior, Fairbanks, or TransGo. These kits allow the torque converter to charge in Park as well and as a side benefit, you can check the fluid level in Park instead of Neutral (much safer).
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