![]() However, I would pass on FTI for a more serious THM700-R4.†Parts and labor warranty when installed by a GM Dealer or qualified installing independent Service Center (ISC) or when sold over the counter and REPAIRED by a GM Dealer or qualifying ISC. If a mild or stock THM700-R4 is what you want. If anyone here needs to find a shop for a 3,000 HP THM400. They have some great THM400s and PowerGlides! Not state of the art, but that is not what they are claiming to offer anyway. any of you can ask Dalton about me (Just refer to me as the GM Engineering Guy on LS1Tech). I love the Guys there (Dalton is the Man over there) and I love their Torque-Converters! I know them all quite well, and have passed on some of the critical minutia that allows for such Transmissions to be built. However, there are roughly 10 Shops across the country that can properly build a THM700-R4, THM200-4R, and also the 4L60E, for reliable 600 to 1,000+ HP. The information needed to accomplish this is very well known. Most Transmission businesses today can build a Stock THM700-R4, or even a mildly modified THM700-R4 with great results. They are way behind on technology and to this day still implement modifications that only harm the Transmission. That is how hard-parts break/ fail from improper, overly-harsh, bang-shifts. Shim an Accumulator, so that it is physically blocked in place. They do what many uneducated people did in the 1970s and 1980s. Instead of Increasing Line-Pressure apropiately, setting Clutch or Band clearance to a fine/ critical measurement, and sizing the appropriate Orifice, for a particular Shift to be firm and positive feeling. What's wrong with TCI? 'Just curious.TCI (like many other big name Automatic Transmission Companies) has felt that investing the time to learn what makes a Throttle-Valve Transmission work, to be a waste. The Holley/ Earl's Oil-Coolers are absolutely amazing!!! The B&M Oil-Coolers should be purchased as the Long Manufacturing Product as the B&M versions are less and less available. Holley like Federal-Mogul (and the now growing Edelbrock Performance Group), is now the second largest Aftermarket Performance Parts Company in the World. they are being phased-out for Holley/ Earl's Branded Oil Coolers. If you plan on ever servicing/ disassembly of the AN lines spend the money for a name-brand product such as "Earl's".Lastly Holley purchased control/ distribution rights for B&M Oil Coolers. These tend to strip the threads/ become damaged once taken apart for reuse. ![]() Meaning installed and never removed or altered. They are generally perfectly fine for "One-Time" use. Be carefull with any "Summit" or "Jegs" branded fittings/ hose-ends for AN lines. GM made the change to larger transmission cooler-lines across the entire portfolio of vehicles. Life expectancy is increased from just the increase in cooler-line size (flow and temps here are improved). This simple upgrade/ change actually had a great beneficial impact on the transmission oil cooler circuits and torque-converter charge circuits. Really should have the smaller 5/16" lines upgraded to 3/8" hard-line or -6AN hose. Those of our cars and vehicles that are older and did not have OEM 3/8" diameter transmission oil-cooler lines installed. ![]() The same product can be purchased as "Long Manufacturing: LPD4711" or "True-Cool: M7B". while operating quite well, is a over-priced re-branded product.
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