Popping out of gear????

[JosephSmith]

I have a 07 5. 9, With mild upgrades, Exhaust, k&n intake, And superchip flashpack, Sometimes when you stand into the throttle really hard the trans seems like it desnt know what gear to go in, it revs up pretty high (3500rpm) and it sutters. Should I change the filter? BD diesel makes a pressure enhancer annd i was looking to buy it cause i haul a 18ft trailer with 2 tractors on it. I want to get the trans "built" but just dont really have the money right now. Any ideas why it would be doing that? Thanks

 

[ata]

Thats because the clutches are SLIPPING. You have TOASTED the tran's. Better get it fixed while you still have something left to fix.

 

[JosephSmith]

But the fluid doesnt smell burnt like a toasted trans usually smells??

 

[Mark31]

If someone led you to believe that you could add power and "stand on it" and over rev the engine and not fry the trans, they lied and you were gullible. I thought that the first thing one should do is to get a trans built for the horsepower one wants, BEFORE one makes the horsepower. If one can't afford to pay to play, admit it, drive a stocker and be thankful for it. A stocker will handle a 20k combined load a long time if one can use his head for something beside a hat rack. Turn off all power, don't hook to a trailer, and let every little ole lady beat you at every stoplight. I don't think there are any more new 48re trans cases, and I've heard of used ones going for over $1000. Listen to ata. ATF4 isn't going to scorch, stink nearly as quickly as other fluids, so if you smell it you, $$$$$$$$. A pressure enhancer at this stage of the game would be like putting a band aid on a cancer, hoping to cure it. Ain't gonna happen! I'm guessing you are young, so here is hoping you learn a valuable life lesson or two from this. Wishing you the best. Mark

 

[HBarlow]

Reach for your wallet, Joseph. You're getting ready to lay out some serious money for a new or rebuilt 48RE. Some of the money you wasted on an exhaust, K&N (non)filter and the magic black box could have been saved and spent toward a transmission. You're probably within a few miles of a total failure and a tow bill. Sorry for the bad news but that is the reality.

Those transmissions are actually pretty robust and will stand up to a lot of hard work if the engine is unmolested and the transmission is properly serviced on a regular basis as called for.

 

[JosephSmith]

First off... THis isn't my first diesel... I'm not stupid when It co
COmes to cars. I don't leave it on performance all the tIme... Or especially when I have a load behind me. The ad ons were mostly for fuel mileage. It's not slipping to any major extent. Im honestly not too worried about it, and I figured I'd ask to see if any decent guys would be willing to help, but excuse me I guess I was wrong

 

[JosephSmith]

And seriously what does my age have to do with this... I know plenty of guys that are in their 50s and still hot ridding their trucks!!

 

[Mark31]

And seriously what does my age have to do with this... I know plenty of guys that are in their 50s and still hot ridding their trucks!!

Maybe dey has the coins to pay the fiddler when dey dances

 

[cerberusiam]

You cannot go WOT throttle on these transmission in stock form. They will just hold th egear, not lockup, hit the rev limiter, then bounce around looking for gears until the power comes down. Whne you add power that throttle opening comes down until you mod the trans. You should be able to do everyhting needed at 3/4 throttle or less and the trans should work fine. If it still wants to hold gears and shuttle shift you have problems somewhere.

If you have not done it changing out the stock gov solenoid for the GM style, replacing the pressure transducer, and checking the fornt band adjustment is the first step. A lot of times that will solve the problems. If not, then you will need to run some pressur etest and possibly open it up for some new parts.

The stock TC's are extremly loose and it does not take much extra to drive right thru th efluid coupling. Once you over power it there is no telling what will happen with the shifting because the TCM is not smart enough to adjust that fast. It just defaults to no lockup and waits for a n opportune time to do something when rpms and APPS settings come back into range. Hard telling about the shuddering you are getting because I am not sure what gear it is looking for or if is trying to lockup. You could be slipping the TC clutch and\or the direct clutch pack. Eithe rone is going to cause major issues if it continues.

Until you upgrade the trans you will have to learn how hard you can push it and still get it to perform. I have tunes that will not allow more than 50% throttle on upgraded parts or it will simply bounce off the rev limiter and hunt. If you want to be able to wood it at any time and have the trans shift right, that is about a $5000 option.

The pressure enahncers are not going to help over powering the trans. A shift kit is a lot better investment. A tighter billet cover TC is even better. Neither will break the bank and will help a lot.

 

[JosephSmith]

Thank you, this the explanation I was looking for. I have priced some transmissions and they go any where between3000- 5000!! I think I'm looking to get it built the spring.

 

[cerberusiam]

Welcome to the TDR, the dark side of the slippery slope. :-laf You will find nothing good comes cheap on these trucks. There are things you can do in the interim to help it along but in the end it is a light duty trans behind a medium duty engine. Once you pull the safeties nothing is safe, especially your savings.

 

[JosephSmith]

Thanks!! Yea you would think they wouls build the transmissions alot stronger! But i guess you have to pay to play!! :-laf

 

[sag2]

Welcome to the TDR. I went back and read your post again, and I think you might have dodged the bullet on this one so far. The 48RE is a great trans, but it will not live if the power is turned up, even a little bit.
First drop the pan, look at the fluid condition and evaluate any debris in the pan. If it is clean, change the fluid and filter, adjust the bands. Next get rid of the Superchip, and ditch the K&N for a stock paper filter. The K&N has nothing to do with the trans, just trying to save you the next failure (engine) if you do not properly and regularly service it.
When you have the money saved for a built trans, then go for the mods.
Feel free to post a photo of the pan once you drop it. We can help you determine if you can save it, or you hurt it.

 

[SierraRam]

And seriously what does my age have to do with this... I know plenty of guys that are in their 50s and still hot ridding their trucks!!

You have to understan that with this site and all of the great advice comes with attitude. It is sad to see people start with how stupid someone is when they have a problem. There are many on here that believe any modifications to you vehicle classifies you as an idiot. All I can say is don't take it personal, look for the good advice and let most of the stupid comments roll off your back.

The shuttering can be a problem with the clutches or the TC. I do believe you should pull the trans and upgrade it with a billet converter, valve body, clutch packs. It only takes one hard launch with the tuner turned up to damage things in a stock transmission.

 

[JosephSmith]

You have to understan that with this site and all of the great advice comes with attitude. It is sad to see people start with how stupid someone is when they have a problem. There are many on here that believe any modifications to you vehicle classifies you as an idiot. All I can say is don't take it personal, look for the good advice and let most of the stupid comments roll off your back.

The shuttering can be a problem with the clutches or the TC. I do believe you should pull the trans and upgrade it with a billet converter, valve body, clutch packs. It only takes one hard launch with the tuner turned up to damage things in a stock transmission.

Thanks, for you imput, some things i guess you have to take with a grain of salt. Im going to pull the pan soon and check it out. The local transmission shop said they would do a fully built trans, for about 3500. Not going to like that bill too much but well worth the money to keep me on the road instead of on the side of the road with my thumb out in the wind!

 

[HBarlow]

I'm sure you don't want to hear it but I would recommend you don't take it to your local transmission shop. Unless your local shop is familar with high performance rebuilds and the aftermarket high performance parts available from folks like DTT, Goerend, and others you're likely to get just an ordinary rebuild with rebuilder grade parts. It won't last and you'll quickly be back where you are now.

In order to have a transmission that will handle a modified Cummins engine in front and a heavy trailer behind you need a transmission built by one of the names above or others mentioned in TDR. They're not cheap but cheap won't last. I paid $6400 for a full DTT with all the best parts back in '07.

If you would fill in your signature letting members know where you live someone will recommend a shop that will provide what you need.

 

[rscurtis]

Thanks!! Yea you would think they wouls build the transmissions alot stronger! But i guess you have to pay to play!! :-laf

This transmission's DNA goes back to the late '50's and early '60's. How many other manufacturers can make that claim?

 

[HBarlow]

Yup, that transmission was designed and built to hold up behind 426 ci hemi and Chrysler 440 ci engines probably producing 650 horsepower making 1/4 mile passes for a living. They were extremely tough and durable behind a high horsepower gas engine. They were never designed for duty behind a Cummins torque monster but they have handled that surprisingly well also from the first ones sold in the late '80s up through 2007 pickups with 350hp and 650 torque.

 

[SierraRam]

Thanks, for you imput, some things i guess you have to take with a grain of salt. Im going to pull the pan soon and check it out. The local transmission shop said they would do a fully built trans, for about 3500. Not going to like that bill too much but well worth the money to keep me on the road instead of on the side of the road with my thumb out in the wind!

I agree with HB that a standard local transmission shop is not normally equiped with the experience to beef up your transmission to support the additional horsepower and torque. You really need to find a shop with the ecperience and track record of beefing up the 48RE. I would call some of the reputible manufactures like Suncoast, Goerend, etc and speak with them. You need to let them know how much HP you will be running and how you will be using your rig. Evfen with the built transmission it will always be the week point in you rig. I has an 03 that I rebuilt the transmission three times to support 400RWHP, left me stranded in the middle of nowhere twice. Sold it and no have a G56 and Southbend DD clutch supporting 450RWHP, never have has a problem.