Question about 1997 Chevrolet Blazer

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Fourwheel drivedoes not seem to be working

I can hear it kick in and notice the gear ratio is alot lower but only one wheel spins and i get stuck very easily,so im not sure its working properly

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Check the vacuum actuator under the battery

Posted on Dec 27, 2008

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Ford explorer 2000 all wheel drive not working


all wheel drive vehicles have to work at both ends all the time unless you have a major failure in the drive train. That is why it is called all wheel drive as opposed to 4 wheel drive. With 4 wheel drive you have the option of rear wheel drive or 4 wheel drive and normally in a high ratio or low ratio gear selection. With some all wheel drive vehicles there is a selector that locks the middle diff and creates a 4 wheel drive option without the high/low gear ratio option. So in practice if the both front wheels are in the bog then there is no all wheel drive as the centre diff is working as it should and placing all the action in the rear wheels which will not be turning as they have traction so the front wheels spin faster.. If you have a centre diff lock option ensure that it is operational.

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Gear ratio rearend


The pining noise you are hearing is detonation in the engine and comes from incorrect air/fuel ratio making the engine run too lean, It is spontaneous combustion occurring before spark and tends to drive the piston back down the bore. It is detrimental to the engine and should be rectified asap. Run fault codes and look for sensor problems. Vin numbers are unlikely to show the gear ratio of the rear end as there are 4 ratios for each model of car. Jack up on side of the rear . count the number of turns the pinion does for each revolution of the wheel . Divide that by 2 ( side gears in diff carrier multiply by 2 when driving one wheel)and you will get the ratio. So 10 revolutions of the tire gives 35.5. revolutions at the pinion equals to 17.5 or a ratio of 1.75: 1 ratio

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1 Answer

I would like to change the gears in my 91 wrangler in order to fourwheel alittle better. whats the best way and best gears?


Although you can buy a ring and pinion set from most speed and performance outlets, it takes precision installation to install them without which they will fail quickly. There are only a very few actual gear manufacturers but gears are sold under various brand names. If I was to replace the gears in any of my vehicles likely I'd buy ones from Richmond.
Since I have no idea what engine, transmission and wheel/tire combination you have, I'd recommend something around a 4:11 ratio as a good baseline. Going to anything "stiffer" will eat up fuel like no tomorrow.
Many times you can get a good buy on complete differentials (end to end) used, from other off-roaders that are up-grading. Make sure that the ratios are exactly the same front and rear and NEVER use positraction in the front, or spool type units on either end unless you are using it only off road.
To get an idea what gears you have now, there should be a tag on one of the cover bolts. If not, count the number of turns of the driveshaft it takes to turn the wheel one revolution. That number is likely about 3.73 or your differential would be 3.73:1.

Apr 20, 2011 | Jeep Wrangler Cars & Trucks

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How do I know when my Traction control is working on my 2010 Touring? We live in Northeastern Ohio and I seem to be sliding alot when I go to stop and I'm not speeding. Thank You!


A good way of testing the traction control is to stop on a slippery road and then take off fast as to spin the wheels there when wheels start to spin the traction should activate and stop the spinning wheels you may hear it kick inand a light on the dash will say trac active or trac on, as far as sliding when stopping this is where the abs would come in,abs anti skid brake system, this system when you are braking would release the sliding or skidding wheel and you would felt it in the brake pedal, good luck, hope this helps.

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Need to find gear ratio on 2000 chevy blazer


If you want to find the ratio then you can remove the rear differential cover and spin the wheels by hand to turn the gears and find the number on the carrier gear. The numbers will be what you need to tell what the ratio is.

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Have you tried backing up 10-20 feet some fourwheel drive vehicles require that to help unmesh gears and unlock 4x4.

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I have a 06 dodge ram 3500 with Cummings diesel.


you have what is known as an open diff. or worn out clutch packs in a limited slip. most makers put in a open diff because its cheaper and handles better. if you did not pay for it on your invoice your stuck with stock unless you put it in your self.

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the reason it might be shifting so early is because of the gear ratio in the rear end of the truck. it is common in the 2 wheel drive basic model pickup because they were designed to work not travel.

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do you beat this truck, four wheel alot, sounds like one of the axles is broke

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