Engine/Transmission (1998.5 - 2002) 47RE Transmission Slippage

[MichaelRubin]

I have an '01 2500, Automatic and a Edge Juice Chip.



The transmission slips (almost positive its the TC Lockup Clutch) when the Edge Performance chip is installed. It slips even when I am driving on flat land with no Load.



When the Chip is removed, the trans will not slip at all.



Now it seems obvious that it is the extra torque doing this, but without the chip, I can tow a 15,000 lb 30' trailer up steep inclines with no slippage at all, even in overdrive with the TC Locked.



With the chip installed, It slips even with light throttle on flat land with no load. The chip was checked out as OK.



I adjusted the TV Cable to make it tighter, now the trans is a little better, but shifts at a much higher RPM, and still slips a little in OD with TC LOCK (chip installed) If accelerator is floored during slippage, it makes it catch again.



Anyone have any idea how to fix this properly, or have any experience adjusting the transmission line pressure???



Any ideas would Help.



Mike



2001 Ram 2500 5. 9 ISB w/ New BOSCH Vp44 Injector Pump (supposedly upgraded)

2004 Fleetwood Gearbox 30 foot Trailer

2002 Fleetwood Slide in Camper

Edge Juice Performance Module

 

[DieselMinded]

Anyone have any idea how to fix this properly??



Upgrade your Valve body and torque converter .



DM

 

[MichaelRubin]

That is not the answer

The trans slips with no load on flat ground with the chip, but with a 15,000 lb trailer up a steep hill floored in overdrive with the TC locked (no chip), there is no slippage.



What is the edge chip doing to the trucks electronics that is affecting the trans??

 

[fox]

The difference is the position of the throttle. As you push the throttle you are adding pressure in the trans.



Don't spend much time thinking about it , as soon the trans will give up.



You are overpowering it. !!!

When I added power to my 02, ( comp and DD 2 injectors, )I knew it was only a little time till it gave up. One day, with the trailer, it did some damage. I got it home and pulled the trans. Both front and read clutch packs were damaged.



i called DTT and we fixed it. Much better power transfer now.

 

[Lsfarm]

What is happening is

Michael what happens with a fuel box is that with very little throttle pedal you are getting far more torque than the engine can create with full throttle without the chip.



When you give a little throttle the trans does not have the same pressures applied to the clutches as it does with full throttle. With a stock Valve Body, with light throttle in OD locked you will see maybe 105-110 psi, with full throttle you may see 135+ psi. With an upgraded VB, you will see around 20-40 psi higher numbers.



Plan on upgrading the trans, and not just with a Vb and TC, the internals are bound to be damaged some by the slipping you are feeling. Most people are slipping the TC, but the Direct clutch, Third gear clutch , the OD clutch and the TC lockup are all engaged and any or all can slip in OD with low pressures and normal internal leaks in a stock trans.



Hope this help answer your question. PM for more if you want



Greg L

 

[DieselMinded]

I know of several 500 HP trucks running a stock trany with TC and VB upgrades ..... Some have Flex Plates and the other dont ... ... I watch them take the sled down the track also. . IMHO you dont need a full built $5000 Set up unless your 600 HP bound.



Dont get caught up in TDR trany Battles ... everyone is going to tell you you need more ... .



if you say your getting a VB & TC then you better get a Flex Plate ... IF you get the flex plate ... you better get a billet input shaft ... . if you get the billet input shaft ... . you better get the billet output shaft . ,,,,,,, intermediate..... then 3rd gear will go out next better beef it up ... . blah,,,blah,,,blah. .



First thing you have to know is what your Goal Hp/TQ is ... . if its 500HP a Good TC ,VB Will do you just fine if its more then your talking big $$$ to keep it healthy.



DM

 

[Regcabguy]

DTT and you're done!

 

[Holysmokes]

Im gonna go ahead and steer clear of this "mess to be".

 

[MichaelRubin]

Why is it a mess? I was just wondering if there was an electronic issue, or if maybe the trans pump pressure can be increased to hold the clutches tighter.

 

[fox]

Michael, here is my opinion. You can raise the pressure of a stock trans about 10 psi with just a little risk. many have. Higher and you could blow a seal and then you MUST go thru it.



Most of the broken flex plates are guys using a lock -up switch or other device.



Locked torque Converter at low rpm is hard on the flex. Best to keep the rpm above 1800 with it locked.

 

[Lsfarm]

Before you

Diesel minded, your sled pulling buddies are running 1st, 2nd, and 3rd down the track, they are not getting into OD, the situation described here is a slippage in OD on the freeway.



Don't lead people down an expensive and risky path, MOST healthy stock transmissions would not be slipping with a minor fuel box like Michael's truck is. This means that it is one of the loosey-goosey sloppy leaky transmissions that often get into our trucks from the factory. It will most likely NOT survive with just a VB and TC.



I've overhauled and upgraded dozens of transmissions, and installed many fuel boxes and injectors in trucks with stock transmissions. If the trans can hold a minor fuel box then it probably will live for awhile. But if it slips with a fuel box then the trans will not survive. Been there Done that.



So if Michael installs a $1000 TC, and a $400 VB and the third gear or rear clutch or the OD clutch is the problem then when it fries, the TC and VB are contaminated and Michael will be out more $$$ and probably a towing bill too.



Michael, I will repeat my advice, your trans will probably need an overhaul and upgrade. They are not cheap, but do it completely, correctly once, not partially two or three times. Pulling a trailer down the freeway is not the same as running the 1/4 mile or pulling a sled down a 300' track. Pulling a trailer for hours and hours compared to running the 1/4 mile for 13-15 seconds is not the same. And at the dragstrip or pulling track there are usually people around who can tow or trailer you home where you can fix your truck.



When you are out on the freeway on a vaction, you are at the mercy of whoever or whatever repair shop or [gag] dealer is nearby when your trans gives up. And you will probably get stuck spending $2500+ on a stock overhaul that will probably still slip with your fuel box.



If you can't afford a full trans at this time, I would recommend just pulling the box off the truck untill you can get the trans upgraded.



Greg L

 

[DieselMinded]

If I was employed by ReBuilding Transmissions I would say the same .



Truth is With any fueling box and enough weight a brand new transmission off the lot will slip somewhat .



Whats slipping ... . its not the transmission its the TC Face ... when its slipping its streching the bands in the trany and will screw it up .



You need more holding power .



How do you get it ???



You upgrade the VB which will more than double your TC pressure ... . then you upgrade the TC ... . what makes it slip ???? its a combination of 2 things Pressure From the VB and the material the TC is made of ... you dont need a tripple disk to hold more power ... a single will hold the same as long as the material of the TC is the same and the Pressure supplied by your VB is the same also ... . So whats the diffrence between A Single And A Tripple ... . Basicly a tripple keeps the pressure up on the Trany ,,,, while driving and stopping ,,,so a tripple is better for daily driving .



Im not A transmission Employee or an expert of anything But you can fully research what ive stated and see that its all Facts.



Of course a full built is better ... . if you have the MOLAH !!!



BTW "$1000 TC, and a $400 VB"



You can get a quallity TC for less than $700 and you can buy a Trans-go Shift kit for less than $100 And get it put in your VB



For less than $1000 your TC will not slip



If you can afford a full trans at this time, I would recommend just pulling the box off the truck untill you can get the trans upgraded.





DM

 

[Lsfarm]

You don't know what you are talking about

DM, first I am NOT employed by rebuilding transmissions, I am an Airline Pilot. I have a side business/hobby working on trucks. I don't have to do any transmission jobs or sell any parts or accessories to pay all my monthly and yearly obligations.



Check with any of my dozens of satisfied customers for a referral.



I often have to give a customer the bad news that the thousands of dollars they spent on the basis of bad advice was money wasted. I wrote my first post to Michael to keep him from being a similar victim.



Your lack of knowledge about transmissions is showing in your above post. First it is IMPOSSIBLE to 'stretch the bands' in a transmission. Can't happen, never did or ever will. You could break the spot-welded attachment on the end of the 2nd gear band, or bend the apply strut, but you cannot stretch the band. It is not a rubber band. The rear band is hard to describe but is is so beefy that it is hard to imaging anything happening to it.



As I said in my first post, there is the rear clutch, the third gear clutch, the OD clutch and the Lockup in the TC engaged when in OD. If the TC seems to be slipping, it CAN be any of the other items in the chain of items engaged when in OD. Often it is difficult to tell even when actually driving the truck much less when attempting an 'internet diagnosis'.



As for your statement, that a trans-go kit will double the trans pressures that is also wrong. You obviously have never put gauges on a transmission. You can get OD, locked, full throttle pressure from a stock VB of arourd 120 or so and with a kit installed maybe get up to 150psi or so. There is no way to DOUBLE the pressures in the trans.



Quote: . you dont need a tripple disk to hold more power ... a single will hold the same as long as the material of the TC is the same and the Pressure supplied by your VB is the same also ... . So whats the diffrence between A Single And A Tripple ... . Basicly a tripple keeps the pressure up on the Trany ,,,, while driving and stopping ,,,so a tripple is better for daily driving .



What did you just say ??? Are you saying that the TC has an effect on the VB pressures?? Not so.



Later, Greg