How to test Auto Tranny?

How many miles???

Check/change the fluid and see what color it is and how it smells. If it is all dark and smells like @ss, then its a sign that the clutches are going.

The way that you can tell that the tranny is going it that when it shifts, it will slip into redline. I'm not sure that this will show on a car with the track fuse installed though.

Even when my tranny blew up (both times) the engine didn't throw any trouble codes on the computer.

I would tell you to go to a transmission shop and have it inspected, but they'd probably tell you that it was bad even if it wasn't and then charge you an arm and a leg to rebuild it worse than stock.

You best bet is to check out the fluid and then change it very often, only using Toyota T4 fluid.

What do you guys think of Phenoix Hard parts trannys?

ditto

There is a solenoid in the tranny that goes out. When I was BPU and switched the manu button on the shifts were a lot firmer. After a while the shifts felt the same if manu was on or off. The timming of the shift was different, but the firmness was the same. Most people wont notice it. PM me if you have anymore questions.


kirk

RSA Supra said:

How many miles???

Check/change the fluid and see what color it is and how it smells. If it is all dark and smells like @ss, then its a sign that the clutches are going.

The way that you can tell that the tranny is going it that when it shifts, it will slip into redline. I'm not sure that this will show on a car with the track fuse installed though.

Even when my tranny blew up (both times) the engine didn't throw any trouble codes on the computer.

I would tell you to go to a transmission shop and have it inspected, but they'd probably tell you that it was bad even if it wasn't and then charge you an arm and a leg to rebuild it worse than stock.

You best bet is to check out the fluid and then change it very often, only using Toyota T4 fluid.

Click to expand...

Thanks RSA, I have changed the fluid several times in the past year attempting my own version of a full flush ;-) I've changed it every 2-3 months. Therefore my fluid is a nice Kool Aid Red color and smells just like tranny fluid..LOL
Are you saying that a good way to test for slippage is to pull the trac fuse and do a few WOT runs watching the tach and shift points? Does anyone know the factory shift points at WOT? Like you I have no trouble codes and don't trust any of the local tranny shops nor the Toyota Dealer.

BTW, car has ~92k miles...with approx 15k at BPU

Thanks,

Chad H.

supra935 said:

There is a solenoid in the tranny that goes out. When I was BPU and switched the manu button on the shifts were a lot firmer. After a while the shifts felt the same if manu was on or off. The timming of the shift was different, but the firmness was the same. Most people wont notice it. PM me if you have anymore questions.


kirk

Click to expand...

Hey Kirk, thanks for the input. Which solenoid in the tranny went south on you? Also when you pressed the manu bottum did you then shift manually? I've only used the manu mode once or twice at the 1320 and figured that it was about useless for west Texas driving. How much did the solenoid run you and did you have your tranny freshened as well? I see from your sig that you are running 10's (Congrats, BTW) what have you done to beef up your transmission at this point?


Thanks again,

Chad H.

I'm not sure of the part number, but Mohammad should know. From what I understand it's a hard part to get from toyota (back order). The rebuild companies buy them up because they always need replacing. Toyota almost made this problem a recall.

With the manu button on I shifted manually,, It shifts harder when everything is working well. I'm pretty shure it's not worth the hastle of fixing it. Just have the tranny built by your favorite shop and they should be able to see if it's bad. Email Mohammad for more technical questions if you have them. mailto:[email protected]
He is the owner of MZM Internatianal and has a lot of experience with my tranny.


thanks
kirk