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Old 05-29-2016, 08:07 AM   #1
 
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Default Need help with an impala

So,

I bought a 05 LT with a 3800 (Jeeeze its wierd to be back in an 3800 let alone a GM vehcicle) for my girl and I changed the trans fluid in it and now its shifting like ass when it gets hot. I see the temp gauge creep up in stop and to go around 225ish (Scan Tool Verified) and the trans start shifting rough till restart. Best part is that is supposed to be taking this to school 400 miles away at school soon. I dont have a code reader that will pull the TCS code to verify the EPC solenoid code at this moment but it should be safe to drive at this point right? It stays happy on the freeway and crusing around town. The old trans fluid smelled old, but definitely not burnt up. It only does this when coolant temp gets up there. I try driving it like a JO and its fine until the coolant temp (and im assuming trans temp after that) Rises.
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Old 05-29-2016, 08:12 AM   #2
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Hard shifting is usually due to the computer seeing a slip or something in the transmission and automatically asking for full pressure. There should be a code you can read with a scanner that says that's what it's doing.
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Old 05-29-2016, 08:13 AM   #3
 
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10sec my scanner at home wont pull a TCS code or any code on it but it definitely is defaulting to high line pressure. I guess these GMs wont throw the code over regular OBD channels.
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Old 05-29-2016, 06:14 PM   #4
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yeah its a p1xxx code not the generic p0xxx

filter and fluid, you did dex6 right? or was 06 the dex6? crap i cant remember

Hot mode changes alot of trans controls. verify the fans are both working, radiator isnt fuzzied up and check for dex-poo in the rad/recirc tank
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Old 05-29-2016, 06:16 PM   #5
 
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Calls for dex 3 i put in dex 3 from napa [i work there]. Im thinking about going to whatever it takes trans parts and getting a transgo kit for it to fix it sorta so o dont have to practically yank the trans
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Old 05-29-2016, 07:20 PM   #6
 
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just buy the shims from ace for like a dollar and save yourself the money
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Old 05-29-2016, 07:22 PM   #7
 
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Springs too?
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Old 05-30-2016, 02:33 AM   #8
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trans cooler wouldn't hurt. buy a spare junkyard trans and bide your time.

if it's got a 65e it'll eventually fail. i miss my imp.
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Old 05-31-2016, 02:54 PM   #9
 
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Shifts way nicer
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Old 05-31-2016, 02:55 PM   #10
 
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