Major Transmission killers...?
#21
you should drop your pan and allow gravity to drain the fluid- it won't get it all.. this is fine.. you should change your filter.. you should do this at least every 30k miles..
it's my opinion- and my opinion doesn't weigh much as it's wrong more often that it's right: if your adjusting bands, the end is near.. it's sorta like cleaning your ears: either you do it at every interval (along with a flush in the right direction), or you don't do it at all..
the mysteries inside a tranny are a lot more complicated than the act of doing good preventive maintenance.. and other than the check delete (which I still haven't done, dang it) it's all listed in this thread.
#22
here is something so butt **** simple I'm really surprised nobody has said it yet:
when starting the truck after it's been sitting a few hours, always drop it in gear and wait a few seconds before taking your foot of the brake to move..
and another really important one: when moving in reverse, come to a complete stop before moving the shift to a forward gear.. and the same for forward; come to a COMPLETE stop before putting it into reverse.. that is hell on an automatic tranny..
when starting the truck after it's been sitting a few hours, always drop it in gear and wait a few seconds before taking your foot of the brake to move..
and another really important one: when moving in reverse, come to a complete stop before moving the shift to a forward gear.. and the same for forward; come to a COMPLETE stop before putting it into reverse.. that is hell on an automatic tranny..
Fluid gets circulated before I put it in gear.
#23
#24
yup.. so long as that TC isn't starting out dry, and you have a good circulation going on before you start abusing it..
and- by the way- I didn't know ANY of this before I started hanging out in this joint.. This is one of the reasons I hang out.. you pick up some good stuff along the way.
Last edited by drewactual; 04-03-2011 at 05:14 PM.
#25
yup.. so long as that TC isn't starting out dry, and you have a good circulation going on before you start abusing it..
and- by the way- I didn't know ANY of this before I started hanging out in this joint.. This is one of the reasons I hang out.. you pick up some good stuff along the way.
and- by the way- I didn't know ANY of this before I started hanging out in this joint.. This is one of the reasons I hang out.. you pick up some good stuff along the way.
While you are at it, please elaborate on the "dislodged particles" the "tranny is using for friction".
With all due respect, that's a pretty long straw you're using to blow smoke up someones ****.
#26
Could you explain under which circumstances the TC would be anything less than 1/2 full of fluid? Your statement above suggests that the TC will drain itself dry while shut down,(not rotating) for extended periods.
While you are at it, please elaborate on the "dislodged particles" the "tranny is using for friction".
With all due respect, that's a pretty long straw you're using to blow smoke up someones ****.
While you are at it, please elaborate on the "dislodged particles" the "tranny is using for friction".
With all due respect, that's a pretty long straw you're using to blow smoke up someones ****.
#27
Could you explain under which circumstances the TC would be anything less than 1/2 full of fluid? Your statement above suggests that the TC will drain itself dry while shut down,(not rotating) for extended periods.
While you are at it, please elaborate on the "dislodged particles" the "tranny is using for friction".
With all due respect, that's a pretty long straw you're using to blow smoke up someones ****.
While you are at it, please elaborate on the "dislodged particles" the "tranny is using for friction".
With all due respect, that's a pretty long straw you're using to blow smoke up someones ****.
That is one of the reasons why it is recommended not to do a full flush on an old transmission that hasn't been serviced at regular intervals (that and the whole reverse-flow flush thing....but that's another issue).
If it hasn't been well maintained, it is better to change just the fluid in the pan and the filter.
Last edited by Mad_Scientist; 04-03-2011 at 08:20 PM.
#28
I dont believe the "power flush will ruin your transmission" hype because transmission fluid, especially ATF+4, carries contaminants, right? Well, when it is "power flushed" the fluid will carry the contaminants with it to the machine. But thats just one man's theory.
#29
I believe it makes sense to adjust the bands on schedule, since they're covered in clutch material that wears away over time and there's only so much range of motion available to the servos that engage them. (Drum brakes are a good analog: Without self-adjusters to do the job for us, brake adjustment would be a periodic maintenance item just as it is on big rigs.) Once you run out of servo stroke, the clamping force of the bands is reduced, which leads to slippage, accelerated wear, friction material circulating in the oil to do damage throughout the machine, and band anchors falling out of place into the pan. Adjusting the bands ensures that you get back to design specification clamping force so the transmission behaves as designed and doesn't wear out so quickly.
For everyone else: One of the failure modes of these beasties (automatic transmissions, not 46R's in particular) is internal leakage. This is often caused by friction material circulating in the oil, grinding away where steel valves and pistons move within aluminum bores, catching between clutch frictions/steels to score both as it rolls between them during engagement and disengagement, and generally fouling up everything that relies upon the lubrication quality of the ATF. Friction material circulating in the oil is NOT a "friction modifier" or leak sealer. It's a bad thing. If you're counting on friction material circulating in the oil or sticking in worn passages to prevent leaks, your transmission is already a goner. Wouldja rather schedule the job at your convenience in the near future or be forced into it by a sudden dramatic failure? And who the hell wants to drive a truck that can't be counted on to go wherever you want to take it at a moment's notice anyway? Not me!
Myself, I always always always add remote filters into the cooling lines of juicers, primarily to keep dislodged friction material from circulating into and causing wear in places that require lubrication. It's a very cheap way to get a lot more life out of the machine.
Disclaimer: I'm no transmission expert. I've rebuilt a handful of 'em, mostly 727's and TH400's, but I believe that my experience transfers well enough to the 46R's to be applicable. I could be wrong, and I'm always willing to learn from those who know more than the little bit that I do.