Red03SillSS Posted March 5, 2007 Report Share Posted March 5, 2007 (edited) Yesterday my checkengine light came on and I checked it no more than 5 miles from where it come on. 1 Code was "Random Cyclinder Misfire Detected" the other was "Shift Solenoid 'B' Stuck On" Cleared both and have been about 5 miles this morning and nothing yet. HELP!! Anyone know what the hell its doing this for? Edited March 5, 2007 by Red03SillSS (see edit history) Quote Link to comment Share on other sites More sharing options...
misterp Posted March 5, 2007 Report Share Posted March 5, 2007 What were the actual DTC numbers, especially for the tranny code? Quote Link to comment Share on other sites More sharing options...
Red03SillSS Posted March 5, 2007 Author Report Share Posted March 5, 2007 What were the actual DTC numbers, especially for the tranny code? The Random Misfire Code is P0300 Tranny Code is P0757 Quote Link to comment Share on other sites More sharing options...
Krambo Posted March 6, 2007 Report Share Posted March 6, 2007 What were the actual DTC numbers, especially for the tranny code? The Random Misfire Code is P0300 Tranny Code is P0757 The Random misfire is typical of a cam swap but you have no cam (correct?). Not sure what to tell you there but can adjust your "hit count" in that parameter of your tune. You can bump it by like 100 or so but it will not fix your root cause. FYI, I made my "hit count" or misfires detected, the highest allowed by the tuning program. Your tranny code I actually had happen to me. I had erratic shifting and it felt like it was stuck in 3rd gear. It corrected itself in about 3 miles but the tranny temp skyrocketed. This was on a stock tranny with a 3000 stall and bumped line pressure. Turned out that I had the famous cracked acumlulator piston issue. Here is some info for you: Service Engine Soon Indicator Illuminated, Transmission Slips, Engine Flare, Delayed 2-3 Shift, Shifts Missing, No Shift, DTCs P0730, P0756, P0757 (Replace Accumulator Assembly/Service Transmission) #03-07-30-005 - (02/12/2003) 2002 Chevrolet Avalanche, Express, Silverado, Suburban 2002 GMC Savana, Sierra, Yukon XL with 4L80E (MT1) or 4L85E (MN8) Automatic Transmission Built Between February 1, 2002 and April 10, 2002 Condition Some customers may comment that the Service Engine Soon Indicator is illuminated, the transmission slips, the 2-3 shift takes too long, or the transmission does not shift properly. Cause The condition may be due to an improper finish to the bore of the 2-3 accumulator housing, causing damage to the seals. Correction Important Verify the vehicle build date in GMVIS. If the vehicle build date is between February 1, 2002 and April 10, 2002, proceed with this bulletin. If not within the build date, refer to SI for diagnostic procedures. 1) Road test the vehicle with the transmission fluid and engine coolant temperature stabilized at normal operating temperature. Confirm with the Tech 2® that there is a delayed 2-3 shift (greater than 0.45 seconds), or no 3rd gear operation. Important INSPECTION OF A TRANSMISSION FOR EVIDENCE OF CLUTCH MATERIAL OR FINE METAL DEBRIS IN THE PAN DOES NOT A DIAGNOSIS MAKE. The transmission will have non-magnetic metal in the sediment in the transmission pan. The manufacturing/machining process of the transmission case creates a very fine aluminum dust, which when combined with the cooling/lubricating fluid turns to a paste. Even though attempts are made to remove this completely, some will ultimately be missed and will end up in the transmission fluid reservoir (pan). This paste will always remain in the pan. It can not be picked up and pulled through the filter and affect the operation of the transmission. 2) Remove the transmission pan and inspect the fluid. - If the fluid is in good condition, go to step 3. - If the fluid is burned, go to step 6. - If there is metallic debris attached to the magnet in the pan, go to step 6. 3) If the fluid is in good condition, remove the accumulator housing assembly and discard the assembly. Refer to SI Document ID #749332 for the procedure to remove. Assemble the new 3/4 accumulator assembly and reinstall the components. - 3rd and 4th clutch accumulator housing is P/N 8684220. - 3rd clutch accumulator piston seal is P/N 8661647. - 3rd clutch accumulator piston is P/N 8683088. - 3rd clutch accumulator piston inner seal is P/N 8661639. 4) After completing the repair, properly fill the transmission with DEXRON III® Transmission fluid. 5) Continue with Step 10. 6) If the fluid is burned or metallic debris is found attached to the magnet in the pan, the transmission will need to be removed and serviced internally. Important - All of the transmission internal components need to be removed from the transmission case assembly. The transmission case needs to be cleaned thoroughly before reassembly. - When reassembling the transmission, it is imperative that the original accumulator housing assembly is discarded and a new assembly is installed. - For transmission removal and installation procedures, refer to SI Document ID #758291. - For the transmission overhaul procedure, refer to SI Document ID #658951. 7) Inspect the Direct Clutch and Forward Clutch assemblies. Replace them as required during the reassembly process. 8) Before reinstalling the transmission in the vehicle, use the new Transflow Transmission Cooling System Service Tool J 45096 to flush and flow test the transmission cooling system. 9) Reinstall the transmission and properly fill with DEXRON III® Transmission fluid. 10) Road test the vehicle, performing multiple 2-3 and 3-4 upshifts from a cold start. Confirm with the Tech 2® that 3rd gear is present, and that 2-3 shift times do not exceed 0.40 seconds. Parts 08684220 = Housing, 3 / 4 Accumulator 1 08683088 = Piston, 3rd Clutch Accumulator 1 08661639 = Seal, 3rd Clutch Accumulator Piston Inner 1 08661647 = Seal, 3rd 4th Clutch Accumulator Piston 1 Quote Link to comment Share on other sites More sharing options...
misterp Posted March 6, 2007 Report Share Posted March 6, 2007 ... Turned out that I had the famous cracked acumlulator piston issue. ...Yeah but Daniel's got a Transgo HD2C shift kit now, that should have come with an aluminum accumulator piston. Quote Link to comment Share on other sites More sharing options...
Red03SillSS Posted March 6, 2007 Author Report Share Posted March 6, 2007 ... Turned out that I had the famous cracked acumlulator piston issue. ...Yeah but Daniel's got a Transgo HD2C shift kit now, that should have come with an aluminum accumulator piston. I would think.... Quote Link to comment Share on other sites More sharing options...
zippy Posted March 6, 2007 Report Share Posted March 6, 2007 (edited) One of the things I did for the missfire issue on anything with a cam is to change the peramiters in which it check's for missfires. I change the temperatures to 140º min. and 200º max. With yours being stock, I'd guess spark plug wires might be the cause with having headers. Edited March 6, 2007 by zippy (see edit history) Quote Link to comment Share on other sites More sharing options...
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