Tranny issue?
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Junior User
Joined: Oct 2015
Posts: 52
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Tranny issue?
I have a 2002 7.3 f350 4x4 with 4 inch lift, 35s, and ts 6 pos chip and 205,000 miles. Before a put the chip in my trans sorta slipped into 3rd and had the same kind jump issue I'm still having. When I'm at a stop if I ecsellerate 1/2 throttle or more it kinda bumps the truck back, then when I'm stopping if I stop hard it kinda bumps forward. Second issue I know is the tranny is when I have any tune on my ts chip the truck is slamming into gear, no noise just rough. I called ts and they said to clean the PCM more so I cleaned it more and no change. Is the tranny going? If I get it rebuilt (not comfortable doing my own tranny) what parts in it should I upgrade and price range? Anyone have a ts chip and does it do the same thing? Thanks guys
Veteran/Sheepdog
Joined: Feb 2012
Posts: 6,047
Likes: 110
From: Western AR
Up-pipes won't affect the shifting, but you do want to replace them while you have the transmission out! Sooooooo much easier then.
Slamming into gear is not good. If you want to save that transmission, you need to get rid of that stock torque converter and get one rated for a diesel application. Also, get a John Wood valve body or a BTS valve body to go with the new TC, and you could very well make that tranny go another 200k miles. You need to get on this quick, though, before you ruin it.
Pull the pan and look for excessive clutch material on the magnet or in the bottom of the pan. Also keep an eye out for sparkly, little pieces of metal. Will look like glitter in the oil. If you don't find a lot of clutch material or metal flakes, you probably could take the lower cost option of a new TC and valve body. This will cost you in the neighborhood of $800 vs $4000 for those + a rebuild on the tranny.
That is my 2 cents. I just went through this, by the way. My STOCK torque converter failed and took out my tranny. Cost me $4000 to get it all fixed.
Slamming into gear is not good. If you want to save that transmission, you need to get rid of that stock torque converter and get one rated for a diesel application. Also, get a John Wood valve body or a BTS valve body to go with the new TC, and you could very well make that tranny go another 200k miles. You need to get on this quick, though, before you ruin it.
Pull the pan and look for excessive clutch material on the magnet or in the bottom of the pan. Also keep an eye out for sparkly, little pieces of metal. Will look like glitter in the oil. If you don't find a lot of clutch material or metal flakes, you probably could take the lower cost option of a new TC and valve body. This will cost you in the neighborhood of $800 vs $4000 for those + a rebuild on the tranny.
That is my 2 cents. I just went through this, by the way. My STOCK torque converter failed and took out my tranny. Cost me $4000 to get it all fixed.
Thread Starter
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Junior User
Joined: Oct 2015
Posts: 52
Likes: 0
Up-pipes won't affect the shifting, but you do want to replace them while you have the transmission out! Sooooooo much easier then.
Slamming into gear is not good. If you want to save that transmission, you need to get rid of that stock torque converter and get one rated for a diesel application. Also, get a John Wood valve body or a BTS valve body to go with the new TC, and you could very well make that tranny go another 200k miles. You need to get on this quick, though, before you ruin it.
Pull the pan and look for excessive clutch material on the magnet or in the bottom of the pan. Also keep an eye out for sparkly, little pieces of metal. Will look like glitter in the oil. If you don't find a lot of clutch material or metal flakes, you probably could take the lower cost option of a new TC and valve body. This will cost you in the neighborhood of $800 vs $4000 for those + a rebuild on the tranny.
That is my 2 cents. I just went through this, by the way. My torque converter failed and took out my tranny. Cost me $4000 to get it all fixed.
Slamming into gear is not good. If you want to save that transmission, you need to get rid of that stock torque converter and get one rated for a diesel application. Also, get a John Wood valve body or a BTS valve body to go with the new TC, and you could very well make that tranny go another 200k miles. You need to get on this quick, though, before you ruin it.
Pull the pan and look for excessive clutch material on the magnet or in the bottom of the pan. Also keep an eye out for sparkly, little pieces of metal. Will look like glitter in the oil. If you don't find a lot of clutch material or metal flakes, you probably could take the lower cost option of a new TC and valve body. This will cost you in the neighborhood of $800 vs $4000 for those + a rebuild on the tranny.
That is my 2 cents. I just went through this, by the way. My torque converter failed and took out my tranny. Cost me $4000 to get it all fixed.
More Turbo
Joined: Mar 2003
Posts: 578
Likes: 1
From: Green Bay Wi
Stock TC's are not the greatest. The newer billet ones run circles around them and have improved lock up clutch in them. The particulate will hang or stick valves like what you described. Giving various results. Sometimes it will even hang two shifts at the same time. Fluid changes and line filters can help. A question would be do you have a leak coming from the TC now? Sometimes these particulates get hung up in that front pump and that does hold that end of the TC and seal. Just another sign of the times bro. I have the same issue right now in my truck. It is a ticking time you know what. But for now I am going to install a shift kit and change fluid and line filter. Until I can pull and replace converter.
Veteran/Sheepdog
Joined: Feb 2012
Posts: 6,047
Likes: 110
From: Western AR
If it is just clutch material gumming stuff up, and no metal sparklies, you could possibly flush it all out on a GOOD FLUSH MACHINE. Then the new valve body and the RIGHT torque converter need to be plugged into the equation. Of course, there is the question of how much clutch material you have left in there.No, the stock TC cannot handle all the power a MODIFIED 7.3L will dish out. It is a ticking time bomb like hotrod just stated. You need a billet, triple disc if you are going to run your engine on tunes or with modifications that up the torque and horsepower. The stock TC is only rated at 450 ft/pds torque, and you are past that with the tunes.
If you were to replace the TC and the valve body, and the truck was still slipping, you could still take it and have it rebuilt and be ready for it to go back in the truck with the upgraded VB and TC. Either way, you will need a new TC and an upgraded VB to handle the power you are putting through it.
Cargo Master
Joined: Nov 2005
Posts: 2,768
Likes: 58
From: East Tawas, MI
2 things you did wrong come to mind.
Your running oversized tires, and chipped a trans that is at its limit regardless.
Your looking at a rebuild/replace.
Denny
Your running oversized tires, and chipped a trans that is at its limit regardless.
Your looking at a rebuild/replace.
Denny
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Cargo Master
Joined: Nov 2005
Posts: 2,768
Likes: 58
From: East Tawas, MI
Just to add, at 140k my trans went. I have the TS chip and yes it does shift hard.
I had mine rebuilt and had the "Tugger" kit and torque converter installed 1746 out the door. Runs out beautiful.
Denny
I had mine rebuilt and had the "Tugger" kit and torque converter installed 1746 out the door. Runs out beautiful.
Denny
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