Originally Posted by JonEstey
I agree on the bands. I like my truck and I may be her greatest enemy if I go around trying to adjust them. Would you have any idea you she would go into "limp home mode". The fluid wasnt burnt, no shavings. She has gone dead on me quite a few times do to a nasty short somewhere in my system. I figured the power drain my have affected on of the solenoids like the TCC. I do have the notorious P0740 code come up, "Transmission Cluch Circut Solenoid malfuction" how ever I know that could be to many things to list. Any ideas. Oh yhea thnks for the last bit of information. Very helpful.
Well you know it goes into limp home mode when it stays in 1st gear only but I always say if the worst came you can always drive backwards!
Anyways usually the transmission goes into limp home mode when the reverse drum is shot or the reverse band is shot. Remember the reverse band is for 2nd and 3rd gear so you can't go into 2nd then you stay in first which is limp home mode.
Just so you know under the steering wheel is a blue connector that is for a DRB tool that communicates directly with the transmission. The S.B.E.C communicates with the transmission as well. That blue connector is also for the Air Bag control so you can run tests and update the program on it.
Now back to the tranny, just some good stuff you can if you rebuild the transmission in the future you could update the drums with extra friction and steels so you could take a 46RH and upgrade it to be similar to that of the 48 series. Basically it would have a little more power and torque a bit stronger. Oh also very good information with the 46 series transmissions the cooler line fittings and the bell housing are tappered threads so DO NOT OVERTIGHTEN the fittings else wise you will do what I did and thats make a hairline crack in the transmission and then have to hunt down a A518 case which can be hard but they're out there. But what you can do is buy a Tap that is NPS straight thread and just re-tap the threads and replace the stock fittings with high performance straight thread fittings as well which is what I'm going to do when I put a new case on the transmission.
Their are a few things about the 46 I find annoying but all in all it's a great tranny, mines leaking fluid could use a band adjustment soon but it moves and I drove it like 300+ miles in the past couple days and it hasn't driven more than 1 mile in 6 years so it's a decent transmission.
Also pay some attention to the differential regular fluid change if you tow else wise every 50K miles is perfect. The transmission though is very important as long as you do a periodic fluid flush and use good quality ATF+4 and change the filter normally then the transmission will last forever almost. But like I said the bands wear overtime and would require replacement at one point in the lifespan of the vehicle, tragic but life...
I think I sent you that service manual for the 46, if not just PM me your email and I'll be sure to get it out to you.