Quote:
Originally Posted by trac209
Why gm made these units depend on that very touchy cable adjustment for working is beyond me,all it does it make a inherently weak trans even weaker. I will never run one of those vs a th350 or Th400. Id rather run a bit less gear and keep it strong and simple. Ive seen so many burnt 700r4's its silly.
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Why, you wanna know Why, Well I'll tell ya why..
EPA AND C.A.F.E. REGS..
off the throttle idling like in traffic,, it unloads the engine..
part throttle with less pressure (but enough to not slip at factory rated torque) = less loss at the pump as higher pressure takes more h/p torque..
And why the 2004 in the Ss had different parts and the gn had different parts. it was set up for the power the engine made, and give the best mpg, epa emissions and c.a.f.e ratings..
same thing was done with the 7004r with different parts in the f body and different parts in the vette..
This is the same reason they went to electronic control.. it does the same thing, but doesn't require a cable that stretchs that no one checks /adjust at service intervals like g.m. called for..
Nothing wrong with this trans other than they were designed when v8's and v6's didn't make much power.
And need stronger parts added when used behind hotter engines.
no different than putting a th350 behind a bbc.. you would not do that and rebuild it as stock.. as it was not designed to take that type loading..
There is a reason g.m. never backed a big block with a th350..
The 2004r and 7004r get a bad rap because peope stuffed them in for the o/d without upgrading parts, and had no clue on how to set up and check the tv cable..
most that burnt them up had the tv cable on the th350 downshift part of the carb linkage.. a no no..