auto transmission

[shady]

hey guys,

I hav a bit of a problem, when i drive around the 70k mark there was a loud thud goin on. Went down to the transmission guy and he took it for a spin and what ever else. He said that it needs a service and that the torque converter is worn or something. Anyway, he is going to disconnect it. Does it matter if it is connected or not? and what is it for?

Cheers,
Shady

[bangers]

how the hell do you disconnect a torque convertor?

[ucwepn]

A torque converter is basically like a clutch and I don't think the car will run without it. Especially since the vl has a "lock up" torque converter which is electronically controlled. Its also like the flywheel in a manual it keeps the momentum of the engine turning so the driveline doesn't just stop turning when you take your foot off the accelerator.

[mag]

hey guys,

I hav a bit of a problem, when i drive around the 70k mark there was a loud thud goin on. Went down to the transmission guy and he took it for a spin and what ever else. He said that it needs a service and that the torque converter is worn or something. Anyway, he is going to disconnect it. Does it matter if it is connected or not? and what is it for?

Cheers,
Shady

Thats the lock-up part of the converter and all he will be doing is pulling the plug as it's electricly controlled ..
Won't hurt, the only thing that will change is ur fuel bill on long trips will go up..

[harry3]

does this lock up feature work in all gears, one poster said it only worked in 4th, others have said theres no lock up at all

a lock up reduces fuel consumption slightly by stopping slippage

[ucwepn]

I always thought the lockup converter "locks" in third and gives 4th gear because they don't actually have a 4th gear.

[silvervl]

On this 3rd/4th gear discussion. When my auto shifts up from 'D'( when i push the magic button) it goes through two stages of shift. eg. 1,2,3,push button 3.5, 4. Should i seek some attention for the little fella? is this normal? It does not slip or anything (yet).

[burnz]

booo everybody
vr onwards got computa controled tourquekeys
any thing b4 that was bio mechanical
in short he cant disconnect it.
see annother mechanic problem somewhere else.
when the stall lockes it should feel like it's going into fifth

[SMOKN_LJ]

i think it locks up in 4th and stops any torque converter slippage, my converter was slipping in 4th on acceleration my simple fix was put a manual box in it. it took a weekend to do but was worth it.

[shady]

well whateva this guy did it fixed the problem, he cleaned out the transmission and solved the banging...now it is time to get the body kit sprayed and start looking at an exhaust system. lol

thanks

[mag]

booo everybody
vr onwards got computa controled tourquekeys
any thing b4 that was bio mechanical
in short he cant disconnect it.
see annother mechanic problem somewhere else.
when the stall lockes it should feel like it's going into fifth

You where saying....

[harry3]

does anyone know for sure whether the 6cyl auto trans has a lock up feature and if so, its it only on 4th?

[ucwepn]

Model: E4N71B
Type : Four forward speeds and reverse, epicyclic gear trains with clutch operated lock up torque converter.
Operation: Electronically controlled automatic, hydrolic

Four speed overdrive unit with gear selection controlled by an electronic control unit. The torque converter has a lock up capability operated by a clutch within the converter, engaging at various speeds which are programmed into the control unit. When the clutch is applied, the driven member of the torque converter is locked to the driving member creating positive engagement and when the clutch is released the normal characteristics of the torque converter are used to drive the vehicle using oil as the driving medium.

An additional epicyclic gear train in the front of the transmission combines with a direct clutch, a one way clutch, a brake band and an overdrive cancel solenoid to provide the overdrive ratio

[harry3]

nice to know at long last, the lock up of course, saves some petrol

[harry3]

also found this at google, re the jatco E4N71B

Automatics suck, but there are some people who still insist on buying them. All automatic Z31s used the 4N71B transmission. Change the fluid every so often, and check the level every time you change your engine oil. Also, if you overheat your car for whatever reason and it has an automatic, CHANGE THE TRANSMISSION FLUID IMMEDIATELY!!! If you don't, your transmission will blow up as a result of the fluid getting overheated in the cooler and burning inside the transmission, and this is bad. Of course, you could avoid this by putting in a manual transmission, and have more power and economy to boot! The overdrive switch in the automatics has a temperature sensor that does not allow the transmission to shift into overdrive until it is sufficiently warmed up to avoid possible damage

this seems to explain the delay in getting 4th in economy until things have warmed up, a trans specialist said mine was faulty and needed a new sensor

[mag]

also found this at google, re the jatco E4N71B

Automatics suck, but there are some people who still insist on buying them. All automatic Z31s used the 4N71B transmission. Change the fluid every so often, and check the level every time you change your engine oil. Also, if you overheat your car for whatever reason and it has an automatic, CHANGE THE TRANSMISSION FLUID IMMEDIATELY!!! If you don't, your transmission will blow up as a result of the fluid getting overheated in the cooler and burning inside the transmission, and this is bad. Of course, you could avoid this by putting in a manual transmission, and have more power and economy to boot! The overdrive switch in the automatics has a temperature sensor that does not allow the transmission to shift into overdrive until it is sufficiently warmed up to avoid possible damage

this seems to explain the delay in getting 4th in economy until things have warmed up, a trans specialist said mine was faulty and needed a new sensor

Just trying to lighten your Wallet!!!!

[Tree cutter]

Normally aspirated vl has a lock up clutch which is controlled by a solenoid. Turbo vl does not have a lock up clutch because they give trouble with the extra power of the turbo.