[94mustanggt]

I have a 94 gt just last saturdat right when it turned over at 84,000 the transmission started acting strange. it shifts really late from first to second and when i floor it it will go all the way to 6000 rpm and it wont shift until i let off the pedal. my friends all said its prob the transmission filter so i dropped the pan and put in a new one in with new fluid and its still doing the same thing. has anybody ever had this problem? any info would be greatly appreciated! thanks everyone, matt

[itschristorres8]

idk about the problem but if u get a XCAL2 it should be able to have ur car shift when u want it too

[AtlanticBlue99]

Originally Posted by itschristorres8 idk about the problem but if u get a XCAL2 it should be able to have ur car shift when u want it too

doubt that is the problem

the auto trannies usually need rebuilding around 90k miles when driven hard. i broke my tranny at 94k miles and had it rebuilt, needed all new gears and a tq converter. just get it checked out before you break a seal or grind some gears

how is your fluid level? it could be your converter locking up too if it is slow to shift. either low fluid, or locking converter

[Twist 2 Go]

AB, converter lockup aint happening at wot and low fluid would cause the trans to neutral out.

Most probable cause is broken intermediate sprag snap ring and/or broken 1-2 accumulator springs. When you dropped the pan, how much stuff was in there around the magnet? Was the fluid burnt?

[AtlanticBlue99]

Originally Posted by Twist 2 Go AB, converter lockup aint happening at wot and low fluid would cause the trans to neutral out. Most probable cause is broken intermediate sprag snap ring and/or broken 1-2 accumulator springs. When you dropped the pan, how much stuff was in there around the magnet? Was the fluid burnt?

my level was down 6qts and it drove fine until it needed to shift, then it slipped between gears and would eventually stall out. when it got low enough, it locked up the converter.

i didnt have problems getting to WOT, just shifting from any gear to the next and down shifting too. hell, i ran a 14.9 on that broken tranny with 10qts before i finally blew it out

[99mustang232]

on the older 4r70w's pre-98 there was a tsb (#97-11-11) for issues with the 1-2 accumulator and late 1-2 shifting, looked it up on tccoa.com and it said "all have a cast aluminum 1-2 accumulator with rubber o-rings to seal it, with time the rubber wears away and creates a leak, solution is to replace with new molded rubber piece and springs w/accumulator

http://www.tccoa.com/articles/tranny...on/page4.shtml

[Twist 2 Go]

I'll have to call bs on that w/ it being 6qts low. It only holds 12 to start with. Car ain't moving very well , if at all, being that low. Under a hard accel or when taking a turn , it's gonna neutral out. As for the torque converter lockup causing the engine to stall, can't happen as it takes fluid pressure to actuate that lockup. below is the diag chart from the shop manual, you'll notice fluid level isn't listed. If someone told you this, they were blowing smoke at you.

Torque Converter Clutch Operation Concerns: Always Applied/Stalls Vehicle Possible Component Reference/Action
241 — ELECTRICAL ROUTINE
Powertrain Control System
· Electrical inputs/outputs, vehicle wiring harnesses, PCM, torque converter clutch (TCC) solenoid, TFT sensor
· Carry out Self-Test. Refer to the Powertrain Control/Emissions Diagnosis (PC/ED) manual for diagnosis and testing of the Powertrain Control System. Go To Pinpoint Test B or Go To Pinpoint Test A. Repair as required. Clear DTCs, road test and repeat Self-Test.

341 — HYDRAULIC/MECHANICAL ROUTINE
Main Control
· Drain back valve, torque converter clutch (TCC) and plunger stuck, damaged or assembled incorrectly
· Inspect for damage. Repair as required.

· Bolts not tightened to specifications
· Tighten bolts to specifications.

· TCC solenoid malfunction
· Activate solenoid using scan tool. If solenoid operation cannot be felt when placing hand on solenoid, install a new solenoid. Inspect O-rings for damage. Repair as required.

· No. 7 ball incorrect seating
· Inspect for damage. Repair as required.

· Gaskets damaged
· Inspect for damage and install a new gasket.

Pump Assembly
· Bolts not tightened to specifications
· Tighten bolts to specifications.

· Ball missing, leaking, porosity/cross leaks
· Inspect for porosity/leaks, balls missing. Install a new pump as required.

· Gaskets damaged
· Inspect for damage and install a new gasket.

Input Shaft
· Seals damaged
· Inspect for damage. Repair as required.

Torque Converter Assembly
· No end clearance
· Inspect converter and install a new or remanufactured torque converter as required.

· Piston plate damaged or stuck to cover
· If cover is heat-stained, install a new converter and determine the cause of the overheat condition.

[Twist 2 Go]

Originally Posted by 99mustang232 on the older 4r70w's pre-98 there was a tsb (#97-11-11) for issues with the 1-2 accumulator and late 1-2 shifting, looked it up on tccoa.com and it said "all have a cast aluminum 1-2 accumulator with rubber o-rings to seal it, with time the rubber wears away and creates a leak, solution is to replace with new molded rubber piece and springs w/accumulator http://www.tccoa.com/articles/tranny...on/page4.shtml

this is still a problem, even up to the 05 & 06 models. The springs fail even w/ the new piston in place. the most common symptom of this is a hard 1-2 upshift. It has to be driven w/ a broken spring for quite awhile before damage occurs to the rest of the trans

[AtlanticBlue99]

Originally Posted by Twist 2 Go I'll have to call bs on that w/ it being 6qts low. It only holds 12 to start with. Car ain't moving very well , if at all, being that low. Under a hard accel or when taking a turn , it's gonna neutral out. As for the torque converter lockup causing the engine to stall, can't happen as it takes fluid pressure to actuate that lockup. below is the diag chart from the shop manual, you'll notice fluid level isn't listed. If someone told you this, they were blowing smoke at you. Torque Converter Clutch Operation Concerns: Always Applied/Stalls Vehicle Possible Component Reference/Action 241 — ELECTRICAL ROUTINE Powertrain Control System · Electrical inputs/outputs, vehicle wiring harnesses, PCM, torque converter clutch (TCC) solenoid, TFT sensor · Carry out Self-Test. Refer to the Powertrain Control/Emissions Diagnosis (PC/ED) manual for diagnosis and testing of the Powertrain Control System. Go To Pinpoint Test B or Go To Pinpoint Test A. Repair as required. Clear DTCs, road test and repeat Self-Test. 341 — HYDRAULIC/MECHANICAL ROUTINE Main Control · Drain back valve, torque converter clutch (TCC) and plunger stuck, damaged or assembled incorrectly · Inspect for damage. Repair as required. · Bolts not tightened to specifications · Tighten bolts to specifications. · TCC solenoid malfunction · Activate solenoid using scan tool. If solenoid operation cannot be felt when placing hand on solenoid, install a new solenoid. Inspect O-rings for damage. Repair as required. · No. 7 ball incorrect seating · Inspect for damage. Repair as required. · Gaskets damaged · Inspect for damage and install a new gasket. Pump Assembly · Bolts not tightened to specifications · Tighten bolts to specifications. · Ball missing, leaking, porosity/cross leaks · Inspect for porosity/leaks, balls missing. Install a new pump as required. · Gaskets damaged · Inspect for damage and install a new gasket. Input Shaft · Seals damaged · Inspect for damage. Repair as required. Torque Converter Assembly · No end clearance · Inspect converter and install a new or remanufactured torque converter as required. · Piston plate damaged or stuck to cover · If cover is heat-stained, install a new converter and determine the cause of the overheat condition.

thats the diagnosis i got when i blew my tranny on the interstate on the way to cecil, ga. put the car on the trailor and filled it up with 6qts to get a cold full rating on the capsul and got 2 runs before completely locking the converter.

btw what caused this was i blew out the seal on the driveshaft. when on the trailor, we siliconed the gasket area and got two runs before blowing it out again and grinding all the gears on a pass and then locked the converter in staging

[Twist 2 Go]

[quote="AtlanticBlue99"]

Originally Posted by Twist 2 Go If someone told you this, they were blowing smoke at you. thats the diagnosis i got when i blew my tranny on the interstate on the way to cecil, ga.

Like I said, they were blowing smoke at ya. send me a list of the parts replaced and I can tell ya what the cause of failure was.