Transmission Pressure Gauge

[MrMarty51]

Wanting to fill a blank hole in a gauge pod that sits atop of the dash on My truck. Looks mighty ugly glaring back in my direction.
Transmission is the 4L80E and I am wondering what the max pressure electronical gauge would not be overtaxed with pressures beyond its capabilities.
I have done some online searching and the numbers comes from 350 PSI to 500.
I do see that VDO makes a 500 PSI gauge that will fit.
IIRC, the opening size is 2-1/16th inch.
If there is more than one pressure port for gauges then I would install two sending units and a switch to transfer from one sender to the next.
Dont know what I’ll be able to do if there are three ports.

 

[Twisted Steel Performance]

A better idea would be tranny temp... Or do you have that already?

 

[Will L.]

Yup trans temp is far more important than pressure.
A secondary engine coolant temp is always smart imo.

 

[dbrannon79]

Along with EGT.

 

[MrMarty51]

A better idea would be tranny temp... Or do you have that already?

Yup trans temp is far more important than pressure.
A secondary engine coolant temp is always smart imo.

Along with EGT.

Got all of those.
Secondary coolant temp gauge attached to the No. 8 cylinder.
It never varies much over a couple degrees from the coolant temp sensor hooked to the ECM.

 

[dbrannon79]

Diff temp too. that will show you when a bearing is about to fail.

 

[dbrannon79]

@MrMarty51 after we are all done specking out your truck with gauges, it's gonna look like the dash of a Kenworth or Peterbuilt HAHA!

 

[Twisted Steel Performance]

You can get a tranny pressure gauge, but what good will it be other than filling a hole.... Ya have a back pressure gauge?

 

[MrMarty51]

You can get a tranny pressure gauge, but what good will it be other than filling a hole.... Ya have a back pressure gauge?

What is this “ back pressure gauge “ that You speak if ?

 

[dbrannon79]

iirc its a pressure gauge that's plumbed into the exhaust manifold. I don't know all the details on where to plumb it in at or what numbers are good and bad, but it's something for measuring how well the engine is breathing.

 

[ak diesel driver]

I have one on mine

 

[Will L.]

you put one pressure sensor before the turbo and one after the turbo.
The differential of the two is your drive pressure ratio. Ideally you want equal numbers because this means free flowing exhaust through the turbo showing good efficiency driving down the highway. But when you are accelerating hard the back pressure before the turbo will be much higher because the waste gate is closed to force the turbo to spool.

 

[MrMarty51]

I’ll have to check into a set of those.

 

[ak diesel driver]

Mines a dual gauge. Boost on one side drive pressure on the other

 

[Will L.]

Mines a dual gauge. Boost on one side drive pressure on the other

Pics?

 

[ak diesel driver]

My new truck

They look identical to the original nozzles.

www.thetruckstop.us

Install starts about post 79

 

[MrMarty51]

I also seen some that is dual pressure and has two install kits.
I thought was exhaust pressure.
Might have been just air pressure.
I am wondering if the dual air pressure gauge would work if installed with the copper cooling kit ?
A person could make their own copper pipe cooling kit from a visit to the local hardware store.