What tool is needed to install a rear main seal on a 4.3l chevy s10 motor

I tried the DIY service and repair manuals from a website and it actually helped me repair transmission problem in my ford explorer. it wont move forward or
reverse, engine is good both solenoids for forward and reverse work.
I don't have much technical knowledge but I just followed it step-wise, and works perfect! got it from www.reliable-store.com

Yes it can be removed from the top as long as you remove the intake and make sure all the wiring is disconnected. Please note you MUST HAVE the seal installer tool or the seal will leak worse than ever. Trust me on this.

You have to pull the engine loose because it's in between the transmission & engine.

YOU NEED TO REMOVE FLYWHEEL REMOVE OIL PAN. REMOVE REAR OIL SEAL HOUSING BOLTS. USING THE PRY POINT LOCATED AT THE EDGE OF THE CRANKSHAFT REAR MAIN SEAL HOUSING SHEAR THE RTV SEALANT. REMOVE THE REAR MAIN OIL SEAL. INSTALL GUIDE PINS INTO THE TWO CRANK SHAFT REAR OIL SEAL HOUSING CORNER BOLT HOLES OF THE ENGINE BLOCK.INSTALL THE CRANKSHAFT REAR SEAL INSTALLING TOOL ONTO THE REAR OF THE CRANKSHAFT FLANGE. APPLY A 0.2 INCH 3MM BEAD OF SILICONE SEALANT TO THE REAR OIL SEAL HOUSING . INSTALL THE REAR HOUSING TO THE ENGINE BLOCK.REMOVE THE GUIDE PINS AND INSTALL THE HOUSING BOLTS TIGHTEN THE BOLTS TO 89 INCH LBS. REMOVE THE REAR SEAL INSTALLATION TOOL FROM THE CRANKSHAFT FLANGE.THEN INSTALL OIL PAN AND FLYWHEEL.

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)
   
   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.

Hello wizardofoz17: My name is Roger and I will help you. By replacement of the rear seal I assume you mean the rear main seal of the motor. To replace this seal you will need to remove the transmission from the vehicle. Should this vehicle be a four wheel drive then you will also remove the transfer case as well.Remove the flywheel from the engine. Remove the seal from the crankshaft and install the new seal. Reverse the procedure and reassemble the drive train.
Should you be asking about the rear pinion seal of the rear end then please just ask and I will be glad to give you the information. Please rate the answer you received. This way I know it was helpful. Thank You for using Fix Ya. Roger

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.
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.
   

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.
   

Rear main seal and installation tool - 3.8L engine
Click to Enlarge 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.
   

First, unless you have just done some clutch work you should not need to be bleeding the clutch hydraulic system...that shows that it's leaking. There is nothing inside the bellhousing that has anything to do with clutch fluid, so, the fluid you see is either engine or transmission oil (rear main seal or seal on trans input shaft) Could it be that the clutch slave is leaking and it's running down and dripping at the bottom of the housing? (clean it up and check that)

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.

if its the rear seal where the driveshaft enters the trans you need a transmission output seal for the tailshaft housing.