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Blown Auto Transmission


maferga
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Friday night I blew my tranny :crybaby: .

Still don´t know what happend.

Certainly I felt a couple of slipping during the past two weeks, specially when the gas pedal was depressed without the O/D, and when it changed fron 2nd. to 3rd. at full throttle it felt a little sluggish since about 2 months.

But last Friday it was too much...i was hitting @ 210- 225 for about 15min. Stop at a stop light and BUM no movement on D or R !

Does anyone know what it can be ?

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The transmission hasn´t been modiefied. There are really two posibilities:

TC failure - causing low pressure generating eccess friction,

generating excesive heat, therefore destroying

tranny.

Constant excess engine power - generating excesive heat,

therefore destroying tranny.

Fargo I don´t believe is the ESK...I´ll let you know if it is or not.

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The transmission hasn´t been modiefied. There are really two posibilities:

        TC failure - causing low pressure generating eccess friction, 

                          generating excesive heat, therefore destroying

                          tranny.

        Constant excess engine power - generating excesive heat,

                          therefore destroying tranny.

Fargo I don´t believe is the ESK...I´ll let you know if it is or not.

Hi

commiserations & I hope it works out, if not may be able to convert you to manual !!

Dave

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Unfortunately I was a bit stupid and didn´t check anything.

The guys at the shop will tell me based on $$$... :tomato:

Luckily I had an extra tranny !!

I bought for an experiment with the valve body.

I´ll be exchanging them during this week.

Lucky me !

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Uffff...

The other tranny was installed and the car is woking fine !

I´ll now have to repair the damaged one and keep on the side for future times...

I hope this omne holds on for a while ?

Fargo: I believe that this tranny will last longer, based on the ESK pressure upgrade when I race the car and the oil cooler I´ll be installing.

One of the issues brought to the table is that the engine has more power and I have installed the TC, plus the posi-traction; this equation generates no power loss at the rear wheels at launching (sprinting from 0 Km.), which causes the tranny internally to slip, causing a slow degradation of the discs.

This tranny was not damaged by the ESK or excesive heat.

If it had been the ESK it would have lighted up the check engine light or limited the tranny not to change gears, but wouldn´t destroyed it. The alterred signal from pressure selenoid only affects the durability of the tranny in a positive way !

It wasn´t also excessive heat because the oil was perfect.

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In the meanwhile I´m doing some reserach regarding the posibility to install an Auto tranny fron a twin turbo Supra that a friend of mine has. He bought an engine with this tranny to swap from a N/A Supra an then bought a 6-speed Getrag.

I don´t know which of this Toyota tranny´s is:

A340E or A343E, both used by the Supra TT MK4, but the second change

gears like a tiptronic from the steering wheel. Also, the 1st. one handles @

300RWH and the 2nd. @500RWH. Both trannys are 4 speed and have the same

gear ratios.

I will now do some field reseach to measure my tranny´s length with his, plus the fitting of the housing, to see if I have to addapt the housing plus do some modifying or not to the drive shaft ??

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