In this first part of a FIVE part detail oriented video series we do a complete step by step GM service manual rebuild of the venerable GM 4L80E automatic transmission (RPO code MT1). We will be using ONLY the genuine GM factory service information for the step by step procedures involved, only genuine GM OEM parts, and referencing any special tools required along the way. The GM information utilized will include the GM TURM (Transmission Unit Repair Manual) in hard copy printed book form, as well as the online GM SI (Service Information) for any service bulletin errata at www.acdelcotds.com. Many folks find transmission repair a very intimidating project to take on, but with the right information and tools (and sufficient skill and experience) it's really very straight forward to DIY with the help of this video.

The particular 4L80E being illustrated in this video is a 1999 model. If your 4L80E transmission is older, or newer, than this model year you will note some differences along the way. This video illustrating the 1999 4L80E will be most similar for 1997 and up 4L80E transmissions.

Link to part 2:    • 1997  2009 GM Turbo Hydramatic 4L80...  

The eBay and Amazon search links below are paid links, for which I may be compensated and earn a commission, if you choose to buy the parts and tools shown in this video thru them:

GM transmission unit repair manual: https://ebay.us/6ViCWp

GM factory service manual: https://ebay.us/kZc36r

GM 4L80E master overhaul kit (1997 1998 GM 24204441, 1999 2009 GM 24274300 supersedes GM 24210954)): https://ebay.us/bCpjPU or https://amzn.to/3RcvG2C

GM 8654382 line pressure plug: https://ebay.us/pwo4VF or https://amzn.to/3UuTl19

GM retaining rings (8625524, 8626816, 8623153): https://ebay.us/3Te1Uf or https://amzn.to/3LxAjTG

Durabond 4L80E bushings (GMT44, 03118, 8624988, 03131, 02263): https://ebay.us/sXNa8r or https://amzn.to/3Lxddwt

ACDelco 24233978 manual shaft: https://ebay.us/UbrlAE or https://amzn.to/3C6rSfn

ACDelco selective rear case thrust washer (8625401, 8625402, 8625403, 8625404, 8625405, 8626506): https://ebay.us/GfZ5X0 or https://amzn.to/3DGzg1X , https://amzn.to/3eVm2UG , https://amzn.to/3f7mBLp , https://amzn.to/3Uqr7Vp , https://amzn.to/3xEr0vH

Fitzall 34270T rear case saver thrust washer: https://ebay.us/PXUL4h

GM 24202229 low reverse band: https://ebay.us/cHXigl or https://amzn.to/3f7mKyr

GM 24202976 center support piston spring assembly: https://ebay.us/Us8K1I

BET performance manual shaft seal driver: https://ebay.us/p226v3

Transmission clutch spring compressor tool: https://ebay.us/HWcq2w or https://amzn.to/3QUQ88t

52pc bushing driver set: https://ebay.us/ThEdRu or https://amzn.to/3Sj9FjU

KentMoore J41505 seal installer: https://ebay.us/Pb9PKW

KentMoore J39919 center support reamer: https://ebay.us/mb7eeq

KentMoore J21363 seal installer: https://ebay.us/r67Pfh

KentMoore J233271 spring compressor: https://ebay.us/5LHSvb

KentMoore J38734 spring compressor adapter: https://ebay.us/8E75GS

BET performance intermediate clutch piston seal installer: https://ebay.us/dFcNNG

Transtec Lip Wizard seal installer: https://ebay.us/2ylhV3

Rear case seal internal circlip 9 inch pliers (Knipex 44 11 J3): https://ebay.us/8iHgwu or https://amzn.to/3SquAl5

Loctite 640 retaining compound: https://ebay.us/snZzEs or https://amzn.to/3CwDHvo

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1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009

Chapters:
0:00 Rebuild approach, manuals, and parts overview
6:34 Case inspection considerations
8:15 Rear case bushing, seal, and line pressure plug installation
17:42 Parking system components Installation
24:45 Center support, output shaft, sun gear shaft, & forward drum bushing replacement
47:09 Low and reverse band/Thrust washer installation
57:40 Center support reconditioning repair
1:02:30 Center support assembly assemble

Corrections:
1:46 Only composite (friction) plates are included by GM

#drshock #4l80e #obstruck #obstrucks

Disclaimer: DrShock, the alias for the human content creator for this YouTube channel, is not responsible for any damages, injuries, losses, or liabilities associated with any repairs, upgrades, or maintenance performed on yours, or any other, vehicle whatsoever. No warranty, express or implied, is made as to the accuracy or completeness of any information provided within this channel. Viewing and using the “asis" information of this channel is totally at your own risk. Always wear personal protection equipment and follow appropriate vehicle manufacturer service manual guidelines with original manufacturer parts only when performing any repairs, upgrades, or maintenance upon any vehicle.