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Old 01-08-2006, 06:54 PM
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Originally Posted by chianesi
if I were to manually shift through the gears by taking it from 1 to 2 to D, and it work, could that confirm that the servo(s) be bad as well?? I hate computer controlled stuff
I am posting in this thread for more of an educational quest for my own knowledge rather than attempting to solve your problem. I am very confident Crosley can handle that part, provided you supply him with accurate information. But I would like to chime in if that's okay with you guys?
chianesi, did shifting manually allow it to shift to 2nd, which, as indicated by your next post, is now accomplishing that shift?
In further testing, the tranny WILL shift into second but NOT into third. If I were to guess at the dipstick marks, I think the tranny has about 1 qt. too much fluid. One more thing, when I was checking the engine over I noticed that the radiator in the blazer must have come from one with a manual tranny cause the two cooler lines that are supposed to connect to the radiator are connected to each other with a piece of rubber hose, so much for cooling the tranny
#1 overfilled fluid level can cause a foaming effect of the fluid in the reservoir {pan} since, at that level, the fluid can contact geartrain parts in motion, which serve as a 'blender' {for lack of a better term} like the one in the kitchen. This foaming, which is physically a fluid / air mix, can cause pump cavitation and starvation which produces lack of pressure output as well as inconsistant output volume. Long story short: This is very 'not good' when the factor of an automatic transmission relying on constant fluid flow at the right pressure is a major {if not the most important} requirement for proper operation and a normal life span.
Also, the cooling lines being routed in a cooler bypass fashion is obviously a mistake since heat is a major cause of auto tranny failure. I won't go into detail since none is needed. It is a mistake. But it is good you provided that information since this could be a substantial factor as to the cause of your problems.
And concerning your statment of "I hate computer controlled stuff".
I understand perfectly what you mean. I was of that same opinion for a long time. But nowdays, after learning what little I know about car computer systems, and spending the $ for some expensive, but very useful, tools which are very neccesary for diagnostics, repair and modification of the powertrain controls and related systems on these vehicles, I have come to appreciate the advantages that they can provide over the older systems that I grew up with. I have just enough knowledge and equipment to be able to be fairly competent at dealing with computer controls on cars and although I am constantly being asked for help by other mechanics with computer problems they are unable to solve, and edit PCM program parameters in my car, as well as several others, with excellent results {so far}, I realize I know very little about the vast opportunities that these new systems can provide. I did not like running a SBC / BBC without a 4-barrel or two because I built a few that I was proud of the performance results, but after I got past that mental wall against the unfamiliar / in-experienced, for me, computer controls, I now see the advantages and I have much more fun with the scope of control I can have making performance improvements available through punching laptop keys, rather than having to deal with those darn scored Q-jet main jet needle actuator piston bores.
This way I can spend that carb headache time building a forged bottom-end to handle the power gained by the next programming ideas I want to try.
And like that is not enough typing to bore everybody, is the Blazer transmission with 165,000 miles the original unit with no internal service so far?
And one more thing:
If I were to guess at the dipstick marks
Is there a reason a guess is needed rather than a standard observation of the level indicated on the dipstick after the powertrain is at operating temperature. Just curious about that.
Sorry about the length here. Just trying to help
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