Band Adjustment needed?

[MojaveJoe]

Was backing the fifth wheel up my short but steep driveway today. 102F outside and transmission around 250F. When I got to the beginning of the steep part everything stopped, as if I was pushing against an immovable object. It took a considerable amount of fuel pedal to get it moving up that hill.

So Im wondering if my bands need adjusting? Had them adjusted about 20K ago (1 year). In forward Drive the trans seems to shift normally.

All advice and experiences welcome.
Joe

 

[JJPage]

Whenever I back my 5vr uphill, the brake controller applies my brakes??? I have adjusted the level control and tried several different adjustments, it has gotten to the point where I unplug my trailer cord until I have it backed into place. I have a Tekonsha controller, which is overly sophisticated.



I also almost always use 4 lo now, while backing uphill, it backs much easier.

 

[cerberusiam]

Reverse in these transmissions is an adverse condition as far as the physics are concerned. Add to that reverse is too high geared for the weight you can pull its not a happy situation. You might be slipping the rear band a bit but adjusting won't help the low line pressues that will make it apply harder.



Looking at your sig, thats is too much weight to be pushing backwards up a steep slope if you want your trans to live. Do yourself and trans a favor, use low range for that type of manuvering. Even if you skid the tires a bit turning thats a whole lot more acceptable than toasting a transmission.



I have broken the rear band, spun the liings off of it, etc, trying to push too much weight backwards. If I have a 2x4 it goes in forward or not at all. With the 4x4 its low range.

 

[MojaveJoe]

Both important ideas. Thanks guys.

Next time I will unplug my trailer brakes. It did feel like there was some braking going on with the trailer.

My driveway goes from blacktop (street) to concrete (driveway). I considered 4 low but didn't want to overstress the drivetrain maneuverung hard left and right. Could I get away with it?

Appreciate the advice.

 

[cerberusiam]

My driveway goes from blacktop (street) to concrete (driveway). I considered 4 low but didn't want to overstress the drivetrain maneuverung hard left and right. Could I get away with it?



Appreciate the advice.

It feels like it should be a problem but the axle joints are pretty tough. If they can't take a little strain periodically they need to break or go bad so I can replace them with something that will hold.



I would rather scuff a tire and find a bad u-joint than toast a trans. Less money and work to fix.

 

[steved]

Almost sounds like he was simply slipping at the converter... you can only "shear" fluid to a point.

Just another thought...

 

[cerberusiam]

Almost sounds like he was simply slipping at the converter... you can only "shear" fluid to a point.



Just another thought...

Thats what happens, the sloppy converter cannot generate enough flow to handle the load until you really hammer it. A TC unlocked slips naturally if that how one wants to think about it, in reality its about the efficeincy of the fluid coupling which is notoriously bad in a stock TC.

 

[gjones813]

I agree, TQ is a problem, I just put it in 4 LO and do my thing... use gearing to solve the problem for now.



next on my list to do is a better TQ from Goerend, the stall speed is to high on the factory TQ.

 

[KyleKlein]

I would be concerned my transmission temp was at 250 degrees

 

[Matt400]

My driveway goes from blacktop (street) to concrete (driveway). I considered 4 low but didn't want to overstress the drivetrain maneuverung hard left and right. Could I get away with it?

I do it all the time, way better on the truck.

 

[AndrewKing]

HI,

I don't know about the newer trucks but on the older trucks with the central axle disconnect you can buy the "Posi Lock" cable actuator that allows you to run "2 low"
so you can maneuver at low speeds with plenty of torque and no front end bind...

Andrew