Dave Redinger - The Neighbourhood Mechanic
Dave is a licensed auto mechanic with over 40 years in the trade. For the past 24 years he has operated Dr. H. Honda Specialists in Etobcoke Toronto). Dave the neighborhood mechanic can be heard answering his neighbors car questions on AM740 radio each Saturday at 9 AM. Some of these conversations will also be published weekly here on The Auto Channel
October 19, 2005
First Dave’s Ditty:
When was the last time you saw the other side. It may sound crazy but, when was the last time you walked around your car? I’ll bet the only time you ever see the right side maybe at the car wash. Take a moment, have a GOOD look at your car. Check the bodywork, tires, lights, locks etc. It’s just amazing what you’re going to discover. .
I have a Chevy Suburban 1981. I had a lot of Transmission work done last year. What would cause the rear end (differential) to give a bang every time it’s put in reverse? Is it the transmission again? What should I expect to fix?
The problem may have nothing to do with transmission repairs. All differentials have a certain amount of slack... this is referred to as backlash. As the unit ages the backlash increases and may "klunk" when changing direction. Check if the idle is set to high, causing torque levels to be higher than normal. This usually occurs on cold start up when idle is high ...Have a good tech road test the truck chances are nothing is wrong...
Just purchased a 1988 Corvette. The oil pressure gauge fluctuates, one minute it could be 200 kpa and ten seconds later it could be 230-300 and that's with the engine at running at 1500 revs at normal operating temperature. I suspect the oil pressure sending unit may be faulty. I have been unable to locate the sending unit. What's your opinion ?
I think your right in your diagnoses. It certainly sounds as if the sensor is acting up. You did not mention if the oil light comes on. I suspect it doesn’t. The oil light is the fail safe it usually triggers at 7 to 10 lbs per inch. The unit is located at the rear of the intake manifold near the firewall. Best answer here is to install a test gauge and take a reading.
Dave Redinger will answer questions from viewers each week, to ask you can e-mail dave at stikky@ca,inter.net or go to www.am740.ca