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Transmission Trans shifts hard during heavy acceleration but also slip to the point of a hard **** at time of engagement. Trans will not shift with manual shift mood but will shift if selector lever is moved to another gear.

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Sounds like one of the vehicle speed sensors is bad. Either that or ABS unit might have a problem. Auto trans normally use the main speed sensor, but shiftronic/sportronic/etc. usually also use the ABS unit to monitor all 4 wheels to be able to make the best shift possible when you ask it to. So check sensor operation, wires and whatnot, if everything is fine, try to get a friend or someone who can do datalogging from OBD2 port to see if the sensor are being read correctly by the ABS and ECU. If readings in datalog don't seem right and sensors are all good, then you will know the ABS unit or ECU will need replacing.

Posted on Dec 31, 2013

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Posted on Jan 02, 2017

SOURCE: Have a winding sound coming from transmission.

I do not believe there is a DIY solution to this problem, You could try Lucas brand transmission fix. Would only help the problem temporarily. You may have a band in the xmsm going out, or a shift valve. I know 45000 miles does not seem like much on a rebuild, but something is going on inside the case. The Lucas xmsn fix is really thick fluid and it sticks in the valves and makes them fill faster to get to the next gear, or as I understand it, may fix whining for awhile, but when it returns you will have to take it to a transmission shop.

Posted on Jan 07, 2009

  • 3 Answers

SOURCE: 2000 daewoo nubira shift lever moves but gears do not engage

Is this FWD? Maybe check the shift cable.

Posted on Jan 16, 2009

  • 44 Answers

SOURCE: Shifts hard and jerks under hard acceleration.

thottle positioning sensor? if trans has overdrive could be a lock up piece, dont remember name of it. there is a lucas oil product that might help. if it is the overdrive.

Posted on Nov 06, 2009

  • 189 Answers

SOURCE: Trans slips between 2nd and 3rd shift

MV could be the problem. Always work thru issue before buying ANY can of additive. Generally those things just mask the issue..not fix it. Change your fluid,and if that doesnt correct it,then take it in and have the tranny bands tightened. most shops do this relatively in expensively.

Posted on Apr 28, 2010

ZJLimited
  • 17970 Answers

SOURCE: 98 dodge grand caravan. p700

P0700 - Transmission Control System Malfunction.
The code basically what that means is that a malfunction has been detected in the transmission and associated components. There is good news and bad news. The good news is it might be covered under warranty. You didn't say if your vehicle is still under warranty, be aware that you may still have warranty coverage on this since your car is just 3 years old. The bad news is that the P0700 code really means that there are transmission-specific codes that you can't access with a regular code reader. There is a part called a TCM - transmission control module that works in a similar way to your PCM. The TCM handles the transmission electrical "stuff" and it stores further transmission codes.

If you want to pursue the issue yourself, you'll need to get your hands on a higher end code reader, or take it to the dealer or a transmission shop to get the actual transmission trouble codes read. Personally we recommend you get a shop to read those codes for you. The other codes are communication codes, we recommend you clear those codes after you fix the P0700 code and see if they come back, they could be related to the "main" transmission issue. The other good news is the fix for this may just be a software update that the dealer can do.


P1728 - Transmission Slip Error
THis code indicates that the transmission is slipping. When the computer that controls the transmission detects a fault code like P1728, it will put the transmission into a "limp" mode. When the code is cleared and the transmission will function properly until the slippage occurs again. To resolve this problem, you will need to get your transmission overhauled.

Hope help with this.

Posted on Aug 17, 2010

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A transmission filter should never get dirty enough to prohibit the valve body and pump from getting enough fluid. unless you have driven the truck through deep water or heavy off road use.

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MV could be the problem. Always work thru issue before buying ANY can of additive. Generally those things just mask the issue..not fix it. Change your fluid,and if that doesnt correct it,then take it in and have the tranny bands tightened. most shops do this relatively in expensively.

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Shifts hard and jerks under hard acceleration.


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With normal acceleration the 1st to second shift point should be around 2500-3000 rpm. Most of your shifts under moderate acceleration will take place at this same point or when there a light load on the transmission. Under hard acceleration the RPMs will climp higher due to increased power needs and the computer will shift when less power is needed or the RPMs climb to an unsafe speed say5000-6000rpms (depending on where yours redlines). Also going up a steep hill will raise the RPMs higher and goind down a hill will cause a faster shift at lower RPMs. These can always be altered by an individual owner by adjusting shift points, using performance parts and if you have problems (low tranny fluid/trans issues). Your trans RPMS are fine and will vary depening on how your foot accelerates. The shift pattern should be the same every time you drive slow/medium/fast/, look for changes in those patterns you will also catch a problem early.

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