What is the main cause of a transmission leak on a 2001 v6 silverado?

check transmission level look online how to it. look for leaks if none take in for repair, changing thee fluid and filter will not correct problem.



Transmission Fluid Level Check Chevrolet Silverado 1500 1999 2007 2001...

Robert, have vehicle scanned for diagnostic codes. Check for vacuum leaks and if you have not done recently give vehicle a complete tune up cap,rottor,wires,plugs,filter's,etc, including injector/throttle body cleaning. Check the attached links,instruction and guides, Good luck
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Chevrolet / GMC / GEO Transmission Look Up Table

www.autorepairmanuals.biz/page/372807

Blazer, 1993-, 4L60-E. Blazer, 1994 - Up, 6.5L V8 Turbo Diesel, 4L80-E. BLAZER/TRAIL BLAZER/JIMMY, 1995-2003, 4 SP RWD/4X4, L4 2.2L L6 4.2L V6 4.3L ...

Transmission Applications - GM Automatic Transmissions

www.gmautomatictransmissions.com/transmission_applications.php

Avalanche, 2001-06, V8 5.3L 5.7L 6.0L, 4 Spd RWD/4X4, 4L60E. Avalanche, 2004-06... Camaro, 1994-05, V6 3.4L 3.8L, 4 Spd RWD, 4L60E. Camaro .... Monte Carlo, 1997-05, V6 3.8L (W/S.C.), 4 Spd FWD, 4T65E. Monte Carlo ... Silverado, Sierra,1500-3500, 1995-06, V8 4.8L 5.0L 5.3L, 4 Spd RWD/4X4, 4L60E. Silverado ...

4L60E Transmission Rebuilt ' eBay

Smoke test entire vehicle for vacuum leaks

You don't have any idea where the misfire
is from, at this point,find out

You installed parts

That is not what you do,you diagnose & find
the cause of the misfire,no parts involved there

You don't have the professional tools or software
at home, to diagnose without wasting time & getting
no where

Could have a bad intake gasket or mechanical problem
in one cylinder

any 4l60e transmission should work as long as tailshaft is same length. assuming you have an automatic

For this to be done you must purchase a rear main seal by visiting your local parts store and then you must incline the engine remove drive shaft, remove transmission mount, and remove the transmission then you are able to access the rear main seal.

there is a transmission fluid cooler built into the radiator of your truck, which means there are steel lines that run from the side of your transmission up to the radiator, on the passenger side of the truck. the lines are a common leak point due to corrosion. depending on where the leak is, the lines can sometimes be patched, but they sometimes need to be replaced (or fabricated). good luck!

Check your u joints and the transmission mounts. A worn U joints and worn Transmission mount can cause the vibration and can make your speedometer jumps around, cause the VVS is located at the rear of the transmission by the yoke. Good luck and check the VVS wire harness to make sure it's still tight and not damaged.

i had the same problem and it turned out to be the gasket on the rear main seal housing not the rear main seal.

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