Question about 2004 Chevrolet Silverado 1500 Crew Cab

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Need to remove & replace transmission seals, rear main engine seal

How to get into housing, need diagram

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  • Chevrolet Master
  • 2,101 Answers

This is a very big job to do.here is a video all chevy trucks are the same

Posted on Jan 03, 2013

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6ya6ya
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Posted on Jan 02, 2017

SOURCE: Rear Axle Removal

if you are talking about the axle seals, 1.REMOVE THE WHEELS.2. REMOVE THE DIFF COVER(slowly)3.REMOVE THE BRAKE CALIPER ASSEMBLY.4.REMOVE THE 8MM PIN IN THE DIFF CARRIER. 5.TURN CARRIER AND REMOVE THE LARGE PIN.6. FIRMLY HIT IN THE AXLE, A SMALL RETAINING C CLIP WILL FALL INTO THE DIFF HOUSING. DO THE SAME WITH THE OTHER SIDE. ( be careful if you have rear speed sensors remove it when you remove the brake calipers . you will break it when you are pushing in the axles.)7.pull axles and replace seals

Posted on May 30, 2008

  • 140 Answers

SOURCE: Rear Main Seal Leaking

Hello, it's not "easy" but, it's doable.
You'll need to follow the instructions and don't take shortcuts. ask for help if you need it.
Use this link to get an idea of what is involved. Ignore the "remove transmission" part. It can be done without removing the tranny. If you decide to do this buy a service manual to help you. If you have any questions feel free to ask.
Here is the link:
http://www.autozone.com/shopping/repairGuide.htm?pageId=0900c152801caf2a

Posted on Jan 24, 2009

  • 26 Answers

SOURCE: leaking rear main seal.

Replacement is pretty difficult, but if you go to advance auto parts, (cheap trick) you can buy "rear main seal repair" it works. I used it on my dodge dakota, and the leak only persisted for about a week, and was fine after that. Worth a shot, a new seal is very hard to install. You have to basically pull the entire motor up and out to reach it for one, then, setting the seal is just a pain.

Posted on Feb 14, 2009

  • 400 Answers

SOURCE: i need to replace the rear main seal on my 95

Yes, either pull the trans or pull the engine. No way to get in there with out having one of the two out!
FYI it's very rare for a rear main on that engine to leak, Most all of the time it's the oil pan gasket or coming from higher up like a valve cover or the intake gaskets!

Posted on Oct 21, 2009

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Diagram rear main seal


Don't need a diagram, you have to pull the transmission to replace the seal. It is the seal in the engine block that goes around the crankshaft output to the transmission.

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How do I replace the rear seal on a cadillac cts


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Need a engine diagram for a 2.8 ltr v6 showing rear main seal


Just a little advise before you jump to thinking the rear main seal is leaking. The vast majority of the oil leaks from these 2.8L motors are the rear intake manifold seal and the distributor o-ring. I would check them first. The rear main seal is in the lower rear of the motor, you have to remove the transmission to replace ti.

Jan 22, 2011 | Pontiac Firebird Cars & Trucks

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How to repair front crankshaft seal leaks oil


Need to get at the crankshaft seal, usually by removing the crankshaft pulley and using a seal remover to take out the old seal, then put a new seal in.

Here are some instructions on how to do the 'rear' seal:
Rear Main Seal Removal & Installation 2.4L, 3.3L & 3.8L Engines To Remove:
  1. Remove the transaxle and flexplate. CAUTION
    Make sure not to damage the crankshaft sealing surface when removing the oil seal.
  2. Insert a flat-bladed pry tool or equivalent through the dust lip at an angle.
  3. Carefully pry the oil seal out of the engine. Pry against the chamfered edge of the crankshaft, do not damage the sealing surface of the crankshaft or an oil leak may occur.
To Install:
CAUTION
Smooth any burr or rough edge on the crankshaft with 400 grit sandpaper to prevent seal damage during installation.
NOTE: When installing seal, no lube on seal is needed.
  1. Place special tool 6926-1 seal guide or equivalent on crankshaft.
  2. Place the seal on the guide. Make sure the seal lip is facing the crankshaft and the guide tool remains on the crankshaft. Rear crankshaft seal installation (2.4L engine shown, 3.3L & 3.8L engines similar) chry-03-24-827.gif

    CAUTION
    Do not drive the seal into the block past flush. An oil leak may occur.
  3. Drive the seal into the block using a seal driver or special tool 6926-2 and handle C-4171 until the tool bottoms out against the block and the seal is flush.
  4. Install the flexplate and transaxle.
3.0L Engine To Remove:
  1. Remove the transaxle and flexplate. CAUTION
    Make sure not to damage the crankshaft sealing surface when removing the oil seal.
  2. Remove the oil seal with housing from the rear of the engine block.
  3. Remove the oil seal from the housing.
To Install:
  1. Clean the sealing surfaces on the seal housing and engine block.
  2. Use a commercial seal installer to install the seal in the seal housing.
  3. Apply a light film of motor oil to the seal lip.
  4. Apply silicone sealant to the oil seal housing sealing surface and install the housing with seal on the engine block. Tighten all bolts to 104 in. lbs. (12 Nm).
  5. Install the flexplate and transmission.
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Dec 31, 2010 | 1997 Plymouth Voyager

1 Answer

Rear barring an seal replaced


I'm not sure if this is the right part of your car but, are you talking about the rear seal on the engine for the crankshaft?

If so:

Rear Main Oil Seal REMOVAL & INSTALLATION Fig. 1: Rear main seal installation for the 2.3L and 2.5L engines 85553306.gif
Fig. 2: Removing the rear main seal 85553307.gif
Fig. 3: Installing the rear main seal on the 2.9L engines 85553308.gif
If the crankshaft rear oil seal replacement is the only operation being performed, it can be done in the vehicle as detailed in the following procedure. If the oil seal is being replaced in conjunction with a rear main bearing replacement, the engine must be removed from the vehicle and installed on a work stand.
  1. Remove the starter.
  2. Remove the transmission from the vehicle, following the procedures in Section 7.
  3. On a manual shift transmission, remove the pressure plate and cover assembly and the clutch disc following the procedure in Section 7.
  4. Remove the flywheel attaching bolts and remove the flywheel and engine rear cover plate.
  5. Use an awl to punch two holes in the crankshaft rear oil seal. Punch the holes on opposite sides of the crankshaft and just above the bearing cap to cylinder block split line. Install a sheet metal screw in each hole. Use two large screwdrivers or small pry bars and pry against both screws at the same time to remove the crankshaft rear oil seal. It may be necessary to place small blocks of wood against the cylinder block to provide a fulcrum point for the pry bars. Use caution throughout this procedure to avoid scratching or otherwise damaging the crankshaft oil seal surface. To install:
  6. Clean the oil seal recess in the cylinder block and main bearing cap.
  7. Clean, inspect and polish the rear oil seal rubbing surface on the crankshaft. Coat a new oil seal and the crankshaft with a light film of engine oil. Start the seal in the recess with the seal lip facing forward and install it with a seal driver. Keep the tool, T82L-6701-A (4-cyl. engines) or T72C-6165 (6-cyl. engine) straight with the centerline of the crankshaft and install the seal until the tool contacts the cylinder block surface. Remove the tool and inspect the seal to be sure it was not damaged during installation.
  8. Install the engine rear cover plate. Position the flywheel on the crankshaft flange. Coat the threads of the flywheel attaching bolts with oil-resistant sealer and install the bolts. Tighten the bolts in sequence across from each other to the specifications listed in the torque chart in this section.
  9. On a manual shift transmission, install the clutch disc and the pressure plate assembly following the procedure in Section 7.
  10. Install the transmission, following the procedure in Section 7.
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Oct 07, 2010 | 1994 Ford Explorer Limited

1 Answer

I have a 2006 Pontiac Grand Prix, it is supercharged 3800. I have about 115,000 miles on it and I change the oil every 3,000 miles, check fluids, regular preventative maintenance, etc. I noticed a small...


If it's oil, it's coming from the rear main seal.. I would go with this idea.

The seal doesn't cost much but the labor to get to it does.

To give you an idea what is involved the procedure is illustrated below from the service manual:

Removal & Installation 3.8L Engine To Remove:
  1. Drain the engine coolant.
  2. Drain the engine oil.
  3. Remove the oil pan.
  4. Remove the engine flywheel.
  5. Remove the rear oil seal housing and gasket. Rear seal removal 3.8L gm-03-38-1175.gif

  6. Remove the rear main seal by placing the housing face down on 2 blocks of wood. Using a drift tool and hammer tap the seal out of the housing.
To Install:
NOTE: Do not lubricate the rear main oil seal or the installation tool. Do not touch the sealing lip of the rear main seal once the protective sleeve is removed.
NOTE: Use a clean lint free cloth to clean the crankshaft sealing surface. Remove sharp edges or burrs that could damage the rear main oil seal. Remove burrs or sharp edges with a crocus cloth.
  1. Carefully remove the rear oil seal from the protective sleeve.
  2. Install the oil seal onto the seal driver EN-47623 or equivalent by placing the seal at an angle and twisting until it is fully seated.
  3. Install the seal into the housing using the seal driver EN-47623 or equivalent and driver handle J-8092 or equivalent. Apply downward force until the seal is seated. NOTE: Ensure that the housing gasket is installed correctly and that the oil passages are not blocked.
  4. Using a new gasket Install the rear oil seal housing on the engine being careful not damage the rear main seal. NOTE: The plastic inserts are used in production and are not needed for assembly.
  5. Hand tighten the bolts. Rear seal housing alignment 3.8L gm-03-38-1176.gif

  6. Place a straight edge on the crankshaft rear oil seal housing flange and the engine block oil pan flange. Using a feeler gauge check that there is no more than .0004 in (0.10 mm) step on each side. Rotate the housing to make the steps equal on both sides.
  7. Tighten the housing bolts 11 ft-lb (15 Nm) plus an additional 50 degrees.
  8. Ensure that the housing did not move out of specification. Repeat step 6 if the oil seal housing is not within the specified range. Replace the rear oil seal housing if the specified measurement can not be reached.
  9. Install the flywheel.
  10. Install the oil pan.
  11. Fill the engine oil and the cooling system.
  12. Check for leaks
5.3L Engine To Remove:
  1. Remove the flywheel from the crankshaft.
  2. Remove and discard the crankshaft rear oil seal from the rear cover.
To Install:
  1. Use clean engine oil to lubricate the outside diameter of the crankshaft rear oil seal and rear cover oil seal bore.
  2. Install the tapered cone and bolts of a J 41479 or equivalent crankshaft rear oil seal installer onto the crankshaft.
  3. Place the crankshaft rear oil seal onto the tapered cone.
  4. Install the threaded rod of the J 41479 crankshaft rear oil seal installer into the tapered cone. Rear main seal installer 5.3L gm-03-53-3872.gif

  5. Install the crankshaft rear oil seal by turning the handle of the J 41479 clockwise.
  6. Remove the J 41479 crankshaft rear oil seal installer from the crankshaft.
  7. Install the flywheel onto the crankshaft.
prev.gif next.gif--- I'm not sure what the exact cost would be as the hours were not listed for this procedure on my online resource.

Sep 02, 2010 | 2006 Pontiac Grand Prix

1 Answer

I have an oil leak between the rear of the engine and the transmission bell housing what parts do i need and how can i get a repair manuel


Unless it's coming from the valve cover down, this is the rear main seal. Generally, you'll have to remove the starter, axle(s), linkage & transaxle, then the flywheel to expose the seal. It is mounted in an aluminum bracket that bolts to the engine around the crankshaft to hold the bearing and help to provide the proper sealing to that area. While you are there, you should consider replacing any seal in that area to prevent the need of pulling the trans again.

If you do that, you'll remove the entire bracket & be able to easily remove the rear main seal.

The seal can also be pulled out where it is if you are careful, by using a couple of sharp screws & tapping into the center of the seal, away from either edge so as not to damage the housing or the crankshaft, then pulling the seal out. I use 2 screws as a rule & predrill with a low speed drill making sure not to touch anything but the center of the "hard" area between the 2 surfaces. A bent tip on a screwdriver can also provide you with a means to pull the seal. Either works, you just have to be sure not to scratch the crank or the aluminum bracket that holds the seal.

This method eliminates the need for replacing other gaskets in that area.

Parts: Rear Main Seal (set) includes the paper seal. Consider the Trans main/input seal, you are there and the method for replacing it is very similar, pop it out & push another back in. You'll need RTV for the paper seal if you do replace it.

As far as the manual, there's more than one type & place to get them, including on-line. If you go to one of the parts stores like Autozone, they will provide you access online to vehicle specific repair info if you just take a minute to register. Pep--boys has a multitude of manuals for most vehicles.

good luck.

Feb 02, 2010 | 1999 Mitsubishi Mirage

1 Answer

My 1994 camaro w/ 3.4L engine has an oil leak in rear of engine. It is running down both sides of the block in rear. Oil filter is wet, but not leaking, the starter and bell housing drip oil and its...


This is most likely a leak from your rear main seal. It happens and can be a pain to replace if you're a DYI kinda person without the nec. equipment.
  1. Raise and safely support the vehicle with jackstands.
  2. Remove the transmission.
  3. If equipped with a manual transmission, remove the clutch and pressure plate.
  4. Remove the flywheel assembly.
  5. Using a suitable prytool, carefully pry the old seal out.
6. Inspect the crankshaft for nicks or burrs, correct as required.
88143g59.gif Crankshaft rear main seal - 5.7L engine

To install:
  1. Clean the area and coat the seal with engine oil. Install the seal onto tool J-34686 for 3.4L engines, J 41349 for 3.8L engines or J 35621 for 5.7L engines.
  2. Install the tool (with the seal mounted to it) onto the rear of the crankshaft. Tighten the screws snugly to be sure the seal will be installed squarely over the crankshaft.
88143g60.gif Exploded view of the rear main seal installation - 3.4L engine
Click to Enlarge

  1. Tighten the wing nut on the installation tool until it bottoms out.
  2. Remove the tool from the crankshaft or rear oil seal housing, as applicable.
88143g61.gif Rear main seal and installation tool - 3.8L engine
Click to Enlarge
88143g62.gif After position the seal on the tool, install it to the crankshaft housing

  1. Install the flywheel.
  2. If equipped with a manual transmission, install the clutch and pressure plate.
  3. Install the transmission.
  4. Check the fluid levels, start the engine and check for leaks.

Dec 30, 2009 | 1995 Chevrolet Camaro

2 Answers

Rear main seal is leaking on a Ford Mustang 2003 V-6


In order to replace the rear main seal u have to pull the transmission out to access it, u will need a special seal installer tool to install the new rear main "full circle seal", it u don't use the special ford tool the seal will leak again, also if there is a groove worn ion the crankshaft the crank must be repaired or replaced or the or the seal will leak again, so this is avery diff job, a 9 on the scale of 1-10 with 10 being the mos difficult.

May 10, 2009 | 2003 Ford Mustang

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