Outer Limits 4x4 Board

Is there any way to make this clunky damn auto transmission better?

By better, I mean:
- Increase fuel economy
- Increase power

You can't really make an auto produce more power... but you can increase its efficiency.
For starters, get a full auto trans service for it, often makes them a lot better at changing, and i spose more efficient because of this.
If you wanted to spend money, you could look at a shift kit or upgraded bands which make it change faster... although you might be better of swapping in a better box to start with from a different vehicle.

What is exactly wrong with your current box?

HotFourOk wrote:You can't really make an auto produce more power... but you can increase its efficiency.
For starters, get a full auto trans service for it, often makes them a lot better at changing, and i spose more efficient because of this.
If you wanted to spend money, you could look at a shift kit or upgraded bands which make it change faster... although you might be better of swapping in a better box to start with from a different vehicle.

What is exactly wrong with your current box?

It's all within spec apparently, and I've just had it fully serviced.

It saps a lot of power, uses much more fuel than the manual counterpart, and gets confused about what gear to use.

Was thinking of one of those Extreme valve bodies from Wholesale Automatics, possibly even a low-stall kit and trans cooler.

What could I replace it with?

What engine is it bolted to ?

physh wrote:It saps a lot of power, uses much more fuel than the manual counterpart, and gets confused about what gear to use.

Thats pretty much sounds like any automatic transmission, not just a toyota one.

If you want more power, better economy and be able to 100% control what gear you need, the answer is simple.

physh wrote:
It's all within spec apparently, and I've just had it fully serviced.

It saps a lot of power, uses much more fuel than the manual counterpart, and gets confused about what gear to use.

Was thinking of one of those Extreme valve bodies from Wholesale Automatics, possibly even a low-stall kit and trans cooler.

What could I replace it with?

A low stall kit will use more fuel I think... but will make it get off the line a touch better than it does now.

If the box is 100% and it's still not good enough, time to change.
If you are unhappy, look into changing to a manual box of the same model.

The higher the stall converter RPM rating, the more revs it will take for the engine to move the car (very basic way of explaining it). Drag auto's use high rpm converters so you can "stall them up" against the converter, by holding brake on and applying power. Stall speed is the max rmp the converter will let the engine "slip" to against a locked transmision. Lifting hte stall converter RPM will make the car quicker of fthe line, as it can build torque up at a higher RPM. But because it takes mroe revs to make the car move, it becomes a pain in the but to drive on the street.

ooops. i think i got sidetracked.

Layto....

check this out

http://www.automatictransmission.com.au ... _a442f.asp

..I guess that's what you are thinking about doing?

My thoughts are it owuld not be worth the money, better to put up with it or replace with manual.

lay80n wrote:The higher the stall converter RPM rating, the more revs it will take for the engine to move the car (very basic way of explaining it). Drag auto's use high rpm converters so you can "stall them up" against the converter, by holding brake on and applying power. Stall speed is the max rmp the converter will let the engine "slip" to against a locked transmision. Lifting hte stall converter RPM will make the car quicker of fthe line, as it can build torque up at a higher RPM. But because it takes mroe revs to make the car move, it becomes a pain in the but to drive on the street.

ooops. i think i got sidetracked.

Layto....

Other reason drag cars do it is to get the engine up to its peak torque rev point at takeoff, rather than having to wait for the engine speed to build on the strip.

Tradeoff is also with a high stall converter the energy has to be dissipated somehow, and it is dissipated as waste heat, bucketloads of it.

That rebuild would be soooo expensive....

damn.. this is bling


Every aspect is covered in that rebuild... great job

But yeh, you could throw a manual in with change left over

Anyone know - How much would it cost to convert it to manual box?

Drive-in, Drive-out price... And a place to go?