been having problems recently with the trans in my truck (47re) sort of hanging in 2nd  first time was maybe a month ago after a rather fast pull off from a standstill but after it wouldn't change up from 2 to 3  I backed off a little and it changed up, was ok for days then happened again sometimes after accelerating.

This morning I accelerated at traffic lights to beat a real slow car oncoming, did over 5 miles in 2nd and no matter what I did it would not change to 3rd

Got to my workshop and checked the trans oil, brown but not burnt, time to change it but it's not done 20k

Had to use my truck today towing my mobile workshop, set off from my workshop to the site and after a mile or so it's ok, had a few hiccups in nearly 150miles but only after having to accelerate if I was steady on the throttle no problem, couldn't help it a few times to get the truck/trailer and 4 huge Cat batteries in the bed moving

Like I said trans fluid doesn't stink but it's brown, never overheated and does not slip at all, trans supposedly rebuilt just before I bought it so done somewhere between 40 to 50k mostly towing, no codes on my 2023 software S/On Triton

I've read the 2 page old post on how a 47re changes gear and pretty much decided to get the pan off, check the filter, check the 1 to 2 and 2 to 3 valves in the VB, and  adjust the bands, I fitted the 2 solenoids which are wired together (can't remember what they were for) about 18months ago seem to remember I still had one in the kit I bought still to fit IIRC

 

Am I missing anything ?????   

 

Unfortunatly it's just what I was dreading as a trans repair here in the UK is not recommended, don't think it;s electrical as no codes  

 

It has only got to last a few months as I've bought a AM General M50 6x6

2 hours ago, Mopar1973Man said:

 

3.30:1 final ratio with an extra tall 4th gear at 0.68 compared to manuals at 0.75 or 0.73. This is a huge amount of stress on clutches and bands.

 

 Now remove OD and do the calc in 3rd lockup which I use 99% of the time, I've said time and again on this forum that 3rd Lockup is perfect for my truck on UK roads, I'm at 2k at 50mph, I used OD as an overdrive and never use it when towing unless downhill for a long stretch

 

Do the calc without OD and tell me it's wrong, it will be closer to 4.55 or better

I've done hard towing up bumpy mountain dirt roads before and spent most of the time in 2nd gear.

 

I don't think the tranny was designed for it. It puts a lot on the band and hub.  Plus the direct clutch is un locked but the plates sliding past each other so lots of lube is required. 

 

The engineers probably didn't envision continuous 2nd gear use.

I've seen a 46RE and a 47RE struggle to handle Idaho mountain roads. Both cases run like 15 to 25 MPH running up a narrow single-lane road at grades of 12% to 16% on average and these transmissions are not designed to run unlocked in 2nd gear forever. Lil' Red I've managed to run that transmission rather hot a few times trying to just get to the next pullout so I was not shut down in the middle of the road. I have a few client trucks running hot as well on the same road system. You just can't run 15 to 25 MPH on a dirt road with an unlocked torque converter that is just churring heat out. Auto's were not a good option for towing and climbing long mountain grades. The only way I can see getting around this would be to send your valve body to Dynamic Transmission in WA and have him modify the valve body so you have lock up in every gear. This way you can manually call for lock-up in any gear and that would cut the heat. 

 

Manual transmissions hold up to the mountain roads way better than any automatic. Braking resistance is better and coupled with an exhaust brake it's even better. In my two trucks I can drive almost anywhere and not really ever touch the service brakes very much. A good reason I get 200k to 250k miles out of a set of brakes and rotors. 

 

8 hours ago, Great work! said:

I've done hard towing up bumpy mountain dirt roads before and spent most of the time in 2nd gear.

 

I don't think the tranny was designed for it. It puts a lot on the band and hub.  Plus the direct clutch is un locked but the plates sliding past each other so lots of lube is required. 

 

The engineers probably didn't envision continuous 2nd gear use.

Should have stopped and shifted to low 

 

7 hours ago, Mopar1973Man said:

I've seen a 46RE and a 47RE struggle to handle Idaho mountain roads. Both cases run like 15 to 25 MPH running up a narrow single-lane road at grades of 12% to 16% on average and these transmissions are not designed to run unlocked in 2nd gear forever. Lil' Red I've managed to run that transmission rather hot a few times trying to just get to the next pullout so I was not shut down in the middle of the road. I have a few client trucks running hot as well on the same road system. You just can't run 15 to 25 MPH on a dirt road with an unlocked torque converter that is just churring heat out. Auto's were not a good option for towing and climbing long mountain grades. The only way I can see getting around this would be to send your valve body to Dynamic Transmission in WA and have him modify the valve body so you have lock up in every gear. This way you can manually call for lock-up in any gear and that would cut the heat. 

 

Manual transmissions hold up to the mountain roads way better than any automatic. Braking resistance is better and coupled with an exhaust brake it's even better. In my two trucks I can drive almost anywhere and not really ever touch the service brakes very much. A good reason I get 200k to 250k miles out of a set of brakes and rotors. 

 

It was a one off and the 5th I have now is much lighter AND after that I learnt the hard way to not trust a sat nav  even when it's set for real trucks cos the things are stupid sometimes

 

Already asked about a valve body and trans but no international shipping 

 

gen 2 4x4 cummins manuals are rocking horse ~~~~ here,  yesterday I found a truck pretty much the same as mine for sale  nearly £16k   paint was perfect though, mine isn't

 

Guess we need to dig a bit more.

Trans after changing the oil and adjusting the bands now seems to be changing ok,   brake accumulator now gone bad,new hydro boost arrived from Summit in 2 days to the UK

 

Collected my AM General M50 yesterday.......  biggest laugh I've had in decades, filled the tank with 40 litres of  unidentifiable engine oil (new maybe 10w/40) 20 litres of petrol (gas) 20 litres of diesel and 20 litres of Cat 50W axle oil, ran great