How to replace Door Gasket

I bought a Door gasket (Part # 2319265T) from AppliancePartsPro.com. The bottom of the gasket that came with the equipment was ripped (completed destroyed). It was loose and out of place for the refrigerator to close properly. I did no removed because it seems to be imposible to remove without breaking the inner door plastic which is very thin and is bonded to the insulation. I contacted a Whirpool authorized service center. They says that they not use the gasket that I aolready bought. They have to use their own which will cost about $150.00 and they will charge me about $156.00 for labor. This is close to what I paid for the refrigerator. The equipment is only 19 months old.
Please I need instruction to snd install the gasket.
Caarlos

Carlos,

I believe you can find some useful information in one of previous posts: http://forum.appliancepartspros.com/refrigerator-freezer-repair/3605-new-door-gasket-wont-seal.html

Here are the breakdown diagrams and Replacement parts for WHIRLPOOL TT14DKXST00 Refrigerator | AppliancePartsPros.com

Gene.