Question about 2001 Chevrolet Blazer

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Replaced my u joints, now drive shaft won't spin in reverse

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It sound as if you have a tooth off give these websites a try www.alldatadiy.com and www.autozone.com if all fails stop by your local library and get your hands on a Haynes auto repair manual for your SUV wish you the best of luck Michigan Man.

Posted on Sep 12, 2010

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I just got a 1998 astro and it had a bad front pinion bearing but I could drive it.Got a used diff. now the van will not move. The front drive shaft spins but the van will not move at all


If the shaft is spinning then you have either a hub or shaft spline issue or the joint is bad or shaft is popped out of joint in the rubber boot.

Oct 22, 2015 | Cars & Trucks

1 Answer

What are common problems that cause the tranny to shift harshly when engaging or shifting into rev. On a 95 one ton dually 2 wd automatic with a 454 big block


What most people see as a harsh transmission shift when transitioning from forward gears to reverse gear is really just the drive train taking up the slack in the connections. You need to realize that over time the universal joints in the drive shaft, as well as the pinion and ring gears in the rear differential will experience wear. When you are going forward the drive shaft is turning one direction, the u-joints and differential gears are all taking stress one one particular side. When you shift to reverse, everything reverses. So, the first thing to happen is the front u-joint changes direction. There will be a small amount of slack in the joint from wear. This slack will cause an irregular motion while it is taken up. This irregular motion is propagated to the rear u-joint, which must do the same. It will induce additional irregular motion, which is passed to the pinion and ring gears in the rear differential. In a new car/truck, you won't hardly notice this since all the wear surfaces are new and at factory tolerances. Give the vehicle 60-100K miles or more of hard wear and the result of this shifting to reverse can be a relatively loud clunking noise that can shake the vehicle. Replacement of u-joints can alleviate some of the issue, but the rear end wear can only be addressed with replacement. But as we say.....if it ain't really broke, why fix it?

Mar 07, 2015 | Cars & Trucks

1 Answer

Spitfire problems


sounds like the diff is at fault

Jun 29, 2014 | 1975 Triumph Spitfire

1 Answer

In my 1982 chevy silverado, the drive shaft won't


It sounds to me that the rear and went out. Crawl under your truck and make sure that your axle is still connected to the yoake. It would be kind of obvious cause if you'reU-joints break your axel would be laying on the ground. Your rear axle has a plug in it. Remove the plug stick your pinky him to the hole and downward trying to see if you can feel axel fluied. If you cannot most likely your ring and pinion is locked up. If you do feel oil pull your pinky out and look at it see if there is metal shavings in the oil. Good luck.

Aug 22, 2013 | Cars & Trucks

3 Answers

I have a 2004 Jeep Wrangler Sport and after about 10 minutes of driving I can hear and feel a clunking noise coming from underneath the Jeep. I have changed the U Joints on the front driveshaft where


Sound like you are having axle issues. Check the front and rear axles on a lift or off the floor on stand. Rotate the wheel by hand in foward and reverse rotation. If you hear click noises or hard to rotate then I am pretty sure the axle assembly are going bad. Also while the jeep are off the floor check your transfer case for oils for any metal shaving.

Sep 18, 2012 | 2004 Jeep Wrangler

1 Answer

Vehicle shakes at 60 mph all wheels and struts replaced


Hello, Are the tires and wheels balanced? If they are balanced then check the drive shaft. This drive shaft transfer the power from the engine/auto transmission to the rear differential/rear wheel.
Now, on each end of the drive shaft is a flexible yoke, this splined yoke has a U-joint with four bearing cups. Two of the bearing cup is attached to the splined yoke and two are attached to the drive shaft. Now, on the rear differential end is a yoke but it has 4 bolts and nuts, it also will have a U-joint attached to the 4 bolted yoke and to other bearing cups attach to drive shaft. U-Joint is called "Universal Joint" Each U-joint has about 10 degree circular travel without any type of binding to the U-joints or the drive shaft.



Two things here. First, take a pry bar and wedge into the U-Joint and move the bar forwards, backwards, up and down. If the drive shafts moves in any direction and clanks. The u-joints need to be replaced and I would replace both of the U-joints. Secondly, if the U-joints aren't loose, then there is a good possibility that the drive shaft is out of balance. In other words, it has lost it small welded plats on the drive shaft and when you are drive you Chrysler the drive shaft is vibrating.



To replace the U-Joints and/or balance the drive shaft. You'll need to remove those 4 bolts and nuts on the differential yoke. Once the bolts are removed then push the drive shaft forward, it will slide forward. Now, under the transmission yoke place a pan/bucket/container to catch the transmission fluid that will drain out once the drive shaft is pull free from the transmission.



If you don't have a press, vise, brass 5 lb hammer, bushing, punches, then I would tackle this job of replacing these U-Joints. Without the proper tools, one can damage the U-joint yokes and the drive shaft. I wouldn't do this without the tools and experience. I use a cutting torch but I have been do it for 50+ years.



If the drive shaft is out of balance, then you will need to take to Drive Line Specialty Shop to have it balanced. Also, have them replace the U-Joints. They have all equipment to do this job. I wish you luck in your endeavor. GB....stewbison

Sep 21, 2011 | 2004 Chrysler Sebring

1 Answer

Replace u joint on GMC S15 pickup


You'll need a bench vice for this. A few sockets help as well. Once you get the shaft off the truck, put a smaller diameter socket on one side and a much larger diameter socket on the other and sandwich in a vice. Compress vice to drive the U-Joint through shaft (smaller socket will drive the one side through the other with the much larger socket). Installation is the reverse of removal.

Apr 24, 2010 | 1988 GMC S-15

2 Answers

I have a 2005 Dodge 1500 with a 5.7 Hemi. when I start out in forward or reverse it makes a popping noise sometimes and you can feel it shaking.


Just a guess, but it sounds like the U-joint on your drive shaft could be going…With a cool vehicle of course, you should be able to lay under the vehicle and physically grab the drive shaft and turn it back and forth and hear a clang or feel the looseness etc…You won’t hear the pop till the torque is applied...It’s not an expensive job, of terribly difficult to repair yourself…tg

Mar 15, 2010 | Dodge Ram 1500 Cars & Trucks

5 Answers

Transmission issue, when in reverse heard a clunk, then a whining sound....later there was no reverse...2001 chevy blazer


ok my truck done the same thing put it in reverse then to drive to check my universal joint and heard a pop and then i lost 2nd, 4th, and reverse all at one time it ended up being the sun-shell gear in the tranny cost me almost 500 to fix hope this helps out

Dec 20, 2008 | 1999 Chevrolet Silverado 1500

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