Transmission refresh, what is worth the money?
I bought my LBZ last year, and it has been down because the truck needed a lot of work (replaced the entire front end suspension, brakes, steering, etc). Well, that's all done now, and I wanted to do a refresh on the transmission to keep the thing as durable as possible. I have a feeling I need to replace the flex plate due to every 3rd start the starter grinds against something (thought it was the starter, replaced it, and it still happens). It'll eventually catch and start, but I'm assuming it's time to replace the flex plate in case it's a time bomb waiting to happen.
Because I'll be doing that, I figured it would be a good time to replace the TQ converter and any gaskets, etc that should happen while I'm in there. The truck will see some mild-medium desert off-roading, and LOTS of towing my racecar around mountainous terrain. I tend to overbuild things, because I like bulletproof drivetrains, so I wanted to get recommendations on flex plates and TQ converters as well. I'll probably do a tune and basic bolt-ons, but nothing crazy on the engine, so I don't want to get too crazy, but I'd rather have something that gives me some headroom with reliability.
I did some searching, and ran across doing an LML converter over an aftermarket for a more mild upgrade, but also read that the pressure is different so you have to be careful? I'm new to automatics, so I'm not entirely sure what they were talking about. I also read that the factory flex plates crack easily, so getting an aftermarket one is a good idea. Any other recommendations are appreciated as well.
'06 Chevy 2500HD LBZ: Exploring & Towing (Cognito Lift Kit & 33s, but mostly stock)
'90 Nissan Skyline GTR: Weekend Fun
'96 Nissan 240SX: Road Race Car
'07 Subaru Legacy Spec.B: Daily