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Why does my truck shift in and out of overdrive?

Why does my truck shift in and out of overdrive? The truck has 115,000 miles. Mostly highway with no towing. Tranny was serviced (flushed) at 30K and at 80K. Fluid level is good and color is normal. The issue is it shifts in and out of overdrive repeatedly if I climb a hill or put load on it. How does overdrive work in a manual car? The overdrive gear performs the same in both manual and automatic cars because, in essence, it is just a gear that has a low ratio. The real difference is exactly what you would expect...
Easy lifehacks

What are the torque specifications for a GM 4.3L V6?

What are the torque specifications for a GM 4.3L V6? 81 972 109.82 Vortec - Main Bearing Cap Bolts Type: Bolt 77 924 104.4 Vortec - Main Bearing Cap Bolts Type: Bolt 15 180 20.34 Vortec - Main Bearing Cap Bolts - 2 Steps: 15 FtLbs; +75degs Type: Bolt Crankshaft Position Sensor To Engine Block 8 96 10.85 Type: Bolt Crankshaft Position Sensor To Engine Block 15 180 20.34 Type: Bolt Can a car engine be used in a marine engine? That’s not a common requirement on car engines, though, which are meant for dry environments. This means the two...
Easy tips

What does it mean when your transmission slams into gear?

What does it mean when your transmission slams into gear? When your transmission slams into gear it can be a sign of abnormal pressures, worn components or even a low fluid level. Start by checking your transmission fluid level and condition on the dipstick. If you find a low fluid level, ad BlueDevil Transmission Sealer and top off the fluid to get things back to normal. Can a bad transmission shift solenoid cause hard shifting? You may also have intermittent problems with the transmission shift solenoid, which will cause shifting problems. This can cause hard shifting or shiftings at too...
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What to do about a Chevy Impala 4L60E transmission problem?

What to do about a Chevy Impala 4L60E transmission problem? ALL ELECTRICAL PROBLEMS ON THE B/D-BODY 4L60E CAN BE FIXED WITHOUT REMOVING THE TRANSMISSION. Secondly, put a line pressure gauge ($55 shipped on Ebay, or visit a local trans shop) on the pressure test port and go for a drive to verify proper line pressure. Are there any problems with the Chevy Impala SS? 8. 1st and 3rd only, no 2,4 or R; sunshell is fractured or splines are sheared off. R&R. Try not to run or drive the car or further damage could result. What does fault mode on...
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Can you put different fans on a radiator?

Can you put different fans on a radiator? Radiators can basically use any fan. Any fan will move some air and the water cooling loop will work. Do you put the fans on the top of the radiator? @safredAAs, you do not want the fans pulling air through the radiator if you put it on top, the dust build up will/should annoy you. If you use the top put the fans to push the air up through the top and remove the filter thing on top for more air to go out the top. Do you need an auxiliary fan...
Easy tips

Where is the serial number on a GM V8?

Where is the serial number on a GM V8? On a small block GM V8, it is stamped in front of the cylinder head on the passenger side. The code is stamped above the timing chain cover on big block V8 engines. Wipe any grease or dirt off the code to make sure you read each digit correctly. Where do I find the GM engine code? This will be two or three digits, and could include both numerals and letters; typically it is three capital letters. Find your suffix in a GM engine code reference. For example, if your code...
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What are the engine block numbers for a 1967 Chevy?

What are the engine block numbers for a 1967 Chevy? 3789817 Blocks Small Block V8 1962-1967 327, 2 bolt 3789935 Small Block V8 1961-1964 283, 2 bolt 3790721 Small Block V8 1962-1964 283, 2 bolt, recessed oil filter boss What was the displacement of the Chevy small block engine? Gen I small-block Chevy engine. This drawing is of the 1967 version of the 302 cid Chevrolet. Drawings by David Kimble.Production of the original small-block began in the fall of 1954, for the 1955 model year, with a displacement of 265 cid, growing incrementally over time until reaching 400 cid in...
Easy tips

Does Chevy still make the Z28?

Does Chevy still make the Z28? Sales were at an all-time high, but with increased gas prices and shortages and new federal safety and emission regulations to adhere to, the Z28 package was discontinued in 1974. Chevrolet brought back the Z28 in mid-1977 largely in response to its sister company Pontiac's success with their Firebird line. When did the Chevy Camaro Z28 come out? The iconic 1979 Chevrolet Camaro Z28! This restored Z28 looks as it would have in 1979. Finished in This Chevrolet Camaro was built on April 29, 1969, and has 26,235 miles (the title reads mileage ex...
Common questions

Is it possible to bleed brakes on a Chevy Silverado?

Is it possible to bleed brakes on a Chevy Silverado? Not true for humans, but sometimes true for hydraulic braking systems. This article applies to the Chevrolet Silverado GMT900 (2007-2013). Bleeding brakes is a war against the most devilish villain in a hydraulic system: air. Is there a way to bleed GM ABS brakes? How to Bleed GM ABS Brakes. Bleeding the brake system after changing the brakes can be hard on some anti-lock braking systems. The good news is that on some GM vehicles, a scan tool isn't needed to bleed ABS brakes. A scan tool is only needed...
Other

How can I test TPS with a volt ohm meter?

How can I test TPS with a volt ohm meter? Check signal voltage. Touch the positive probe to the signal wire tab and touch the ground probe to the frame of the car. If the TPS works correctly, the multimeter will display a reading of about 1/2 of a volt. How Can I Reset the PCM on My Car? What should the TPS sensor read at idle? Typically, the sensor should read around 4.5 volts at wide open throttle and .45 volts with the throttle at the idle position. You can also test the TPS with a scan tool. Connect...