It will include a low roller clutch upon request and the style filter and band you need for the year or your core. HD intermediate snap ring, rear torrington bearing, machined forward hub with torrington bearing, 34 element sprag, and instructions/parts to make your own hydraulic improvements without buying a valve body kit. New internal harness, shift solenoids, and pressure manifold switch. New rear band, front band, filter, full bushing kit, thrust washer kit, new pressure regulator spring for additional pressure. It includes a master kit with High Energy frictions, new steels, bonded pistons, and additional friction for the direct. This kit includes all the rebuild components we use to build our STAGE 2 4L80E units. If it is beyond your skill level, please have a professional technician build the transmission for you. We will provide instructions for our upgrade parts, but basic rebuilding questions will NOT be answered. We cannot rebuild your transmission over the phone or email. ![]() PLEASE understand that we are selling you the kit, not the rebuild. Our kits contain the same high quality parts that we use to rebuild our units. 05 seconds is an issue, you need to be looking at aluminum drums, etc.Due to popular demand we are offering a select few rebuild kits for the DIY rebuilder. 05 difference or so.Īt that ET range, you probably are in TH400 or Glide territory (unless you have specific reason to run a TH350 such as stock class cars), and even then if the. What we do know though is that in almost all cases that I have experienced and others that there is virtually no difference in ET until you get into the low to mid 10 second 1/4 mile range and then you may see. We can conduct mental masturbation over the power consumed all day because few here would have the equipment to test it, and those that do don't share the information. All of this additional weight is rotating weight. The TH400 weighs almost exactly 10 lbs more than a TH350. However if you take that same transmission in 3rd gear and accelerate it from 1000 rpm to 7000 rpm over the course of 10 seconds, it will consume more power than just the previously stated losses.ĭo the same thing but accelerate it over 5 seconds (half the time), it will consume an exponentially greater amount of power. The intermediate clutches as well as the directs are applied in 3rd gear and there isn't any reduction happening in the planetaries as they are locked together in direct drive, so no loss to planetary gear friction. The faster you accelerate the internals, the more power it will consume no matter what transmission you are dealing with.Ī TH350 with all stock internals running at steady RPM in 3rd gear will only be consuming power due to the pump and the small amount of internal friction created by the thrust washers, bushings, fluid, and driving through the low/reverse clutches. and there is not any way to place a number on this because it is dependent on too many variables, the biggest being how fast you accelerate the parts. I've seen all the claims and myths about specific HP consumed by a transmission due to greater rotating weight, etc. If you are going fast enough for it to make any difference, you need a TH400 or Glide anyway. 2 years with drag racing most weekends and no issues.īasically not enough difference to matter. This car had a Th350 with a 4 clutch direct, stock sprag, hardened outer race, and other minor internal mods. ![]() I do also like to use a 5 clutch direct setup on anything above 400 HP. Only the hardened outer race is needed up to the 400-450 HP level. I have been recommending the 36 element sprag/drum setup lately because I can sell them for $200 including the spirolock retainer and hardened outer race, and I can reduce the cost even more on a complete trans that I build. I don't recommend using them above the 650 level just because a TH400 is too cheap to build and have peace of mind. Plenty of friction area, apply area, etc. You will start to see hard parts failures (planetary) at about 800 HP but the clutch area and hydraulics on a Th350 will handle as much HP as a TH400. You can build one with stock clutches, stock sprag (roller clutch), no fancy parts, for minimal cost, and if it is properly assembled and a few minor low or no cost mods are done, it will easily handle the 600 HP level. You shouldn't be having terrible issues keeping the TH350 alive at anything below 600-650 HP/TQ.
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