sajidd

Hi Guys

Just quick question on 1992 4Runner running 3 liter 3VZ E engine.

What is a valve body? what does it do? where can I buy it.
Same with O2 sensors.. what do they do? how many do I need? and where can I buy them?

Regards
Sajid

4Crawler

iTrader: (3)

No sure on the valve body, perhaps you mean throttle body? If so, it controls the flow of air into the engine. See the tech. articles bleow for more information:
- http://www.autoshop101.com/

O2 sensor measures the exhaust gas contents and helps control the fuel/air mixture. Usually need 1 or 2 of them:
- http://www.oxygensensors.com/

sajidd

4Crawler: thanks for the quick reply.

You are right, its probably throttle body, because right now the shifting is very uneven in low range/ speeds.

by the way Is there something called gear valve body ?

4Crawler

iTrader: (3)

Might be referring to the hydraulic valve body on the transmission then. That is what controls some of the shifting functions:
- http://www.autoshop101.com/forms/AT01.pdf

sajidd

4Crawler, i think you are right, hydraulic valve body is what i am probably what i am looking for.

And now to Google.. got to search and buy it.

Thanks for the help and the fantastic website reference.

Sajid

abecedarian

What is the problem(s) with the transmission shifting?
Have you checked the fluid level and / or changed the fluid and filter?
Also, if the engine power is down for some reason, that can affect when and how the transmission shifts.

sajidd

I think fluid levels are ok.

The problem in shifting is that it seems to shift unevenly or quickly, this happens when i am accelerate from stand still position. Once the speed is slightly over 10 to 15 miles per hour, the shifting seems normal.

Also in idle at times there is some kind of a very mild jerk.

Sajid

abecedarian

So it's a quick and hard shift from 1st to 2nd, but 2nd to 3rd and into overdrive are nice and smooth?

sajidd

corect and today i floored it and it ran a bit at 6000 rpm before shifting up...

sajidd

4CRAWLER: Any idea where i can buy the hydraulic valve body?
do you have its part #?

Rgards
Sajid

4Crawler

iTrader: (3)

No clue, never had an automatic. Try: http://www.toyotadiy.com/ or your local Toyota parts dealer.

sajidd

Thanks..anyways..

Just one last question, is it called Hydraulic Valve body or Hydraulic Control unit or Throttle body....are these all the same things?

FredTJ

It's simply called the valve body.
Is is highly unlike that the valve body requires replacement.
You need to take the vehicle to a transmission shop and have
them diagnose the problem. Could be line pressure. Could be
one of more of the shift solenoids. Could be the TV (kickdown)
cable requires adjustment. Could be a lot of things, but the valve
body itself being bad and requiring replacement is a very, very
low probability.



Fred

mt_goat

X2

sajidd

Fred, thanks for the info. Really helps!

Sajid