Question about Cars & Trucks
All others are fine slight crunch going into 4th
Worn gears in box and synchromesh, need stripping and replacement parts
Posted on Dec 28, 2013
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Posted on Jan 02, 2017
Mr. dodge ram, with the 46re trans the pcm needs a signal from the tps sensor to monitor throtlle opening, accel and decel, what has happened the tps has a worn out spot in cruise area, hence the down shift, uphill is fine because your past the worn out spot, replace your tps sensor, its mount on left side of throtlle body , 2 screws, 1 connecter, and its out, when done turn key on, eng off, step on gas pedal 6 times slowly, then turn off key, this will help set min tps setting, GOOD LUCK RDJRP
Posted on Aug 06, 2009
Testimonial: "This was right on. Replaced the sensor and the shifting problem went away. My cruize control which has not worked right for yrs now also works right! "
try changing the oil, paying great attention to manufacturer's recommendations. Could be oil is way too thick and is sticking things that are supposed to slide, until it warms and thins.
Posted on Sep 12, 2009
Testimonial: "thanks for your advice."
you surprise me,these vehicles are bullet proof under normal circumstances and yes the syncros can wear out like any make of vehicle ,but this old grandad who passed his test in a viva with no syncro on first gear ,and passed his hgv on a vehicle with no syncros at all was taught to drive in a different era and rule one was neutral and handbrake on when stopped ,not holding it on a hill by slipping the clutch ,secondly to not put a vehicle in first gear whilst moving ,well it wouldnt go anyway ,double the clutch between gears so as to reduce the wear on the syncros and gears .not to ride the clutch between changing gears and also change down using double the clutch to save the brakes and stop vehicle slipping or skidding on a wet road ,not fly up to a roundabout ,slam on brakes force it into first gear at 30 mph then try to imitate evil kenival by going around on two wheels .This sort of driving will only damage the gearbox like syncros and clutches not lasting very long .
Posted on Jul 03, 2010
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Jun 12, 2014 | 1993 Mercedes-Benz 190
following are the general instructions on the start of diagnosing any
electronically controlled engine or transmission problem.
The engine and the automatic transmission (transmission control is only for automatics, engine is still computer controlled no matter the transmission type) in this vehicle are computer controlled and in most cases when a fault occurs a fault code is stored in the memory of the computer control module. There are exception to this, such as the Mass Airflow Meter and fuel pressure problems. What must be done is to have all the basic testing done such as a scan of the system for fault codes as well as a check with a live data scanner tool for engine functions that are not within range of normal, a trained technician is required to know what is correct and what isn't, then based on careful diagnostics done from a factory repair manual the correct part is replaced or the wiring repaired or the computer replaced (known as the PCM or ECM,ECU), which is very rarely the problem. Other basic checks must be done as well such as mechanical problems with the engine as well as engine state of tune and mileage on the engine. The transmission can have mechanical issues as well such as no gear engagement at all or a failed pump or other pressure related problems. Also engine mechanical problems can and do cause many drive-ability related problem such as rough idle and other symptoms.
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