SBU TRANS DRAIN/FILL PLUG

[TRUKTOR]

Does anybody know what the size/thread is for the fill and drain plugs on the SBU Transmission array?

I believe the ones shown with the size noted and the magnets are for the engine oil pan. Any chance they are the same ?

I'm working on getting a temp. Sender for the drain as shown, for an AUTOMETER Gauge, if anybody happens to have that short-cut info...

Just trying to use the Internet instead of the toolbox....

[Merz-Ben]

John,

The drain and fill plugs are 24mm, and I believe the thread pitch is 1.5... the bottom new plug in your pic looks like a trans plug because an engine oil drain plug has a collar on it for the sealing ring to contact.

Cheers,
Ben

[TRUKTOR]

Thanks Ben, just what i was looking for.
Now back to the adapter page...

[Tmax]

would it be not better to ust the upper bypass hose for the temp sensor where ther oil cooler lines go?

[MultiSmog]

Not all SBU transmissions are threaded to use coolers, in fact, most are not unless I am wrong.

Saludos

[Tmax]

Originally Posted by MultiSmog

Not all SBU transmissions are threaded to use coolers, in fact, most are not unless I am wrong.

Saludos

you may be right roberto. i was reffering to the bypass tube right by the driveshaft imput shaft. maybe only the heavier web casting units have this option.

[MultiSmog]

Originally Posted by Tmax

you may be right roberto. i was reffering to the bypass tube right by the driveshaft imput shaft. maybe only the heavier web casting units have this option.

Hola:

My truck has the heavy transmission and it is not prepared for an oil cooler.
Please find attached pictures of the actual MB oil cooler pipes.
Thx to Dr. Dan for letting me take pictures of his truck.

Saludos
Roberto Espinoza

[TRUKTOR]

Well, my goals are these :

1. Get a temperature gauge for the Transmission operational, and

2. Eventually, get a cooling system for the trans oil, unless the gauge convinces me otherwise.

3. I have a Fluidyne cooler with a fan, left over from another project that would do the trick.

4. An electric continuous duty transfer pump is one way to go, another is shown below.

5. There are gauges which will turn the pump on when a programmed temperature is reached.

These photos show how somebody in Germany rigged
up a driveshaft-driven pump, and used the fill/drain ports to pull the oil out and put it back in. He put a temp sender on each end.

Any input welcomed.

[TRUKTOR]

Here is one gauge that will turn the pump on when the oil reaches a temperature that you have dialed in. There are many others, but some
require additional modules that are extra money.

[mogish]

Fitting a tranny temp gauge on the drain plug is in my P2 list of things to do.

Two questions have been bugging me:

1: How would you go about fitting the Autometer probe on that magnetized drain plug ?

(On my cobalt digital, the probe is 1/8 NPT with an adapter for 3/8 or 1/2 NPT.)

Would you bore-out the plug and thread it to fit the probe without an adapter (to keep as much of the strength of the plug) or would you just weld it to the plug ?

Also, how would you put back the drain plug since the probe is going to block the way for the Allen key fitting ?




2: Are you/we going to have long enough of wire to go from the tranny to the front of the cab ?

The wire set on the Autometer gauge is around 10ft long, me thinks