TC lock up thread

[LoveMyDodge]

Originally Posted by dieselstud27

the instructions from the ats link don't work on my truck. The only thing that it did was keep my transmission from going into overdrive...I'm thinking about trying the suncoast one tomorrow to see if it works.

Well, I am in the same boat. Tranny wont shift into 4th after doing the ATS fix. Any other ideas out there, before I drop the big bucks and run it into the shop.

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1999 2500 4X4 Long bed, Automatic, 4.10's, 4" exhuast turbo back, K&N Cold air intake, Billet(low stall) Torque Converter, Diablo Power Puck.

[Kybel]

My TC Lockup issue is solved by applying dielectric grease to my alternator harness plug and replugging back in. Don't know why, but it works every time. I keep my terminals clean also.

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1999 2500 Sport 4WD QC/SB Auto, 2nd VP, 285/75/16's, Ring MIA, In-tank conversion, 4" Diamond Eye Turbo-back, Quad XZT+, BHAF with outerware, ISSPRO Mech Fuel, PSC Steering Stabilizer, Lukes Link, DTT Noise Filter

[tldcr125]

oddly enough i began having a lock up problem between 40 and 50 mph right after the first oil change i did on my newish truck, the problem went away after a while and tonight i did my secound oil change ( i have owned the truck for about 2 months ) and the problem has started again. i went to school for diesel and i am getting pretty mad because oil changes and torque converters should not effect eachother, please tell me what the hell is wrong with this thing and why the problem only comes back when i do an oil change. coincedence??

[TheWelder]

Hmm, everyone seems to be having this issue between 40-50 mph. I've been having TC lockup issues between 30-40 mph. Is this basically the same thing?

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00' Ext SB Auto, 4" Skyjacker, 285/75R16 BFG's, Edge EZ, DDP 75hp Injectors, Holley Blue Fuel Pump, Boost Elbow, K&N, Fully Gauged, Silencer Ring MIA, Trucker Ladies on the Tailgate!

[Kybel]

Originally Posted by TheWelder

Hmm, everyone seems to be having this issue between 40-50 mph. I've been having TC lockup issues between 30-40 mph. Is this basically the same thing?

Mine will do it pretty much as soon as it shifts to OD and for about 10 mph after that, then clear up and go away. Only seems to do it at those speeds......RPM a contributing factor? I don't know.

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1999 2500 Sport 4WD QC/SB Auto, 2nd VP, 285/75/16's, Ring MIA, In-tank conversion, 4" Diamond Eye Turbo-back, Quad XZT+, BHAF with outerware, ISSPRO Mech Fuel, PSC Steering Stabilizer, Lukes Link, DTT Noise Filter

[Nwhitney]

Ditto on my truck... when it shifts in to OD (45-50)and then locks it LOCK/UNLOCKS untill I get to 55. IF I lock out overdrive it does the same thing in 3rd just after it goes in on light pedal. I cleaned the ground strap at the PCM and that worked for a while, I guess I will do the SunCoast fix next.

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'01.5 2500, Auto, 4X4, Quad Cab, LWB, Power/Heated Tow Mirrors, SMARTY REVO, 4" JEGS Exhaust, Scotty II, Isspro EGT, Boost, Fuel PSI, and Tranny Temp, Carter HP4601 @ engine, Carter HP4600 @ tank, Stadyne Fuel Manager 100 pre LP. Yokohama Geolander A/T

[oudive]

I did the suncoast methood and I have no complaints. I live in Ft Lauderdale area, so there is alot of traffic for the most part of every day.Light on the throttle unless I am letting everyone behind me know I have Cummins. I would be driving along and lock/unlock/lock/unlock.......after the suncoast methood........when it locks....it locks...light or heavy throttle.

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HIS:01 2500 Quad cab 4x4,4"dual exhaust,Airdog 150,Edge juice w/attitude,BHAF,FBD 125's,DTT Tranny,D-Tech Turbo 62/65,2" leveling kit,Padi Divemaster HERS:05 JEEP Liberty CRD 4X4 Diesel n Stock

[Kybel]

Originally Posted by tldcr125

oddly enough i began having a lock up problem between 40 and 50 mph right after the first oil change i did on my newish truck, the problem went away after a while and tonight i did my secound oil change ( i have owned the truck for about 2 months ) and the problem has started again. i went to school for diesel and i am getting pretty mad because oil changes and torque converters should not effect eachother, please tell me what the hell is wrong with this thing and why the problem only comes back when i do an oil change. coincedence??

As I said in my other post, "applying dielectric grease to the alternator harness plug".......Maybe when you spin off your oil filter, you are moving that plug around on the alternator....its very close. Just a thought !

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1999 2500 Sport 4WD QC/SB Auto, 2nd VP, 285/75/16's, Ring MIA, In-tank conversion, 4" Diamond Eye Turbo-back, Quad XZT+, BHAF with outerware, ISSPRO Mech Fuel, PSC Steering Stabilizer, Lukes Link, DTT Noise Filter

[LoveMyDodge]

Well my problem was a crappy rebuild. Only lasted 20K miles. Plus the tranny shop that did it,is out of business so there went my warrenty. $3000 later a she works great.

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1999 2500 4X4 Long bed, Automatic, 4.10's, 4" exhuast turbo back, K&N Cold air intake, Billet(low stall) Torque Converter, Diablo Power Puck.

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Last edited by LoveMyDodge : 08-07-2009 at 09:12 PM.

[diggerdrew79]

im havin the same problems too with the constant lock-unlock from about 40- 50 mph plus i have to shift manually cuz it wont take off in drive unless i floor it and it still dont shift down like it should just dumps smoke and dont go nowere? any thoughts ?

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2001 4 inch strait pipe out the back at a 45 turndown,airdog 150,K+N drop in,industrial VP, superchip microtuner, dirt roads are overrated

[burf11]

I have a similar problem with my truck. I don't think mine is completely unlocking like it seems others are. When it shifts to OD for about 10 MPH 50-55 I get a very slight shuddering. NO change in RPM just feels like I am on a bumpy road. It is worse closer to 50. Is this the same problem???

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01 24 valve 4x4, auto, intake, 4" exhaust, guages, superchips tuner and a freshly rebuilt tranny

[dozer12216]

Originally Posted by burf11

I have a similar problem with my truck. I don't think mine is completely unlocking like it seems others are. When it shifts to OD for about 10 MPH 50-55 I get a very slight shuddering. NO change in RPM just feels like I am on a bumpy road. It is worse closer to 50. Is this the same problem???

Another issue that shows up in this area is a torque converter that cannot hold the torque and slips(shudders) for a few seconds. Sometimes this is result of ATF being dead and needing changing. However it does not take long to fail converter clutch. This happens most frequentlly with modded engines and the chip turned on. The general clue on this one is you are on the throttle some. These modded engines make tremendous torque in the 1600 -2200 RPM range that overpowers a stock converter with stock valve body. So a performance converter and valve body is generally a good bet as part of improved power upgrade path.

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2000 Big Blue Beast 3500 SLT 2WD heavy hauling auto, stage 1 injectors, 232K miles and still growing.
Toys from .049 airplane to 1248 CI D8H dozer. Wanna play!