Maintanence & suspension

Hey folks, now that I’ve got a lift available, I’m planning a day under my Tundra to to replace all fluids, differential, rear end, engine oil, I’ll probably opt for my local repair shop to take care of the transmission because it a flush job (rather than drain) any suggestions for recommendations on fluids, weights, crush washers?
Also, I’m considering a complete front and rear suspension upgrade, just looking for stability/ handling/ ride, I do trailer from time to time. I’m not looking to lift the truck, stock height works best for me.
‘05 Tundra Limited D/C with 157k on the odometer. Looking for the advice from those who have already been there, done that.

 

No such thing as a crew cab in Tundra world. Either AC or DC.

 

and a pretty DC at that....