Trans Temp Issue

[o1marc]

Originally Posted by banman

Again: after your systems are all warmed up after a hwy run, an IR temp gun (decent enough but cheap at HF) will be able to tell you the fluid temps of the tranny at the case, at the hoses going in and out of the tranny cooler.
You can check for hot & cold spots on the radiator or cooler -- this can tell you an individual tube is blocked for example -- a very handy diagnostic tool if you understand what you're looking at.

I have half a dozen temp guns at my disposal, use them in my Powder coating biz. Just didn't take one on the plane with me. This trip I took absolutely nothing with me, no laptop, tools anything. Just me and my wallet. Been lucky so far, 2 completely cross country and one from 400 miles, no issues at all.
Temp gauge issue was a non issue

[EastCoastCB]

Originally Posted by brokedown

I am unreasonably dependent on caffeine.

Oh, I totally need it. LOTS.

[cadillackid]

Banman has a lot of this right.. temp gun is a great way to see if the trans is really hot.. fluid sample is it red, brown. black, smell like oil or smell like burnt sugar?




take the bus out now and run it.. run it at full speed.. its got an allison 2000.. you should be able to feel all the shifts plus the lockup.. if the tach varies alot when you lift your foot up and down on the accel then the lockup is likely not operating.. (many various reasons for this and that would make it get hot).. if you only feel shifts 1-4 and never 5.. say C2 clutch is weak.. holds in 4th or sometimes in 5th and pulls loose.. causes the trans to slip and temperature to spike....


you have the bus in your posession.. drive it and get an idea how it operates

[o1marc]

Originally Posted by cadillackid

Banman has a lot of this right.. temp gun is a great way to see if the trans is really hot.. fluid sample is it red, brown. black, smell like oil or smell like burnt sugar?




take the bus out now and run it.. run it at full speed.. its got an allison 2000.. you should be able to feel all the shifts plus the lockup.. if the tach varies alot when you lift your foot up and down on the accel then the lockup is likely not operating.. (many various reasons for this and that would make it get hot).. if you only feel shifts 1-4 and never 5.. say C2 clutch is weak.. holds in 4th or sometimes in 5th and pulls loose.. causes the trans to slip and temperature to spike....


you have the bus in your possession.. drive it and get an idea how it operates

I put 300 miles on it after it fixed itself, ran flawlessly after.

I told the other guy who drove my other bus I sold this already, he's pissed I didn't let him drive the short bus. I told him maybe tomorrow. Buyers flying in tomorrow, picking it up Mon.

[sportyrick]

You know your radiator also heats the transmission fluid so you don't accumulate sludge, acid and moisture. My engine won't get over 160 until my transmission is up to around 140 then they go up somewhat together. Obviously the cool trans fluid pulls my engine temp down until trans catches up. If you really got to 260 you would be poring tons of heat into your radiator and your engine temp would climb to the moon. I used to run a trans temp in my street racer century's ago, amazing what you learn (heat gun was decades away) A heat gun would be a good troubleshooter.

[cadillackid]

If your engine fan is working properly but your trans is broken you will make way more heat in the trans than that little loop can handle and the engine cooling system is designed to dissipate that trans loop and engine heat load. So no your engine temp shouldn’t go sky high

[jhagan]

Get a heat gun and check your tranny, but having a shortage in your temperature gauge isn't uncommon, especially with an AD2000. Remember, tranny temp gauges are optional so don't go into panic mode.👍

[musigenesis]

Originally Posted by PNW_Steve

You just have to drink more hot chocolate to get your caffine

You just have to drink it the way the Aztecs did: out of the skulls of your enemies.

[Drew Bru]

Originally Posted by jhagan

Get a heat gun and check your tranny, but having a shortage in your temperature gauge isn't uncommon, especially with an AD2000. Remember, tranny temp gauges are optional so don't go into panic mode.👍

Turns out he had an AT545, not a 2000. Irregardless, I have no trans temp gauge but I do have a IR thermometer. What part(s) of the trans do I shoot to get an accurate read on how hot the trans is running? I don't believe I have issues but more information is always a good thing.

[jhagan]

That is your issue.. 545 has no locking torque converter and it is not designed for highway use. I wondered when I saw your RPM rating of 2600 at 60 mph. That high! The transmission will get hot and eventually cause your motor to get hot.

My 6th speed MD3060s and 3000 pts run about 2100 rpm @ 70 mph

[kidharris]

Originally Posted by o1marc

What do you mean that's not how it works? Isn't that why people drink coffee, for the caffeine in it to keep them alert? Hot chocolate has caffeine and I was wide awake after drinking. If anyone lied, it was by body.

I thought that hot chocolate was to help you go to sleep?

[kidharris]

Originally Posted by banman

That's tough -- the shittyist part of "my day" is having to sign off a write up (acft logbook) "could not duplicate"
and the aircraft goes back out to fly...

But an oil sample and code reading will tell you if the oil ever got dangerously cooked. If it did -- then there was a mechanical problem -- may still be a problem...

If no mechanical evidence of a problem than it's more of an electrical problem -- gauge failure in and of itself is not catastrophic, the loss of good information can cause the operator to damage the equipment...

A&P license?

[cadillackid]

I drink hot chocolate on some of my winter late night code jams.. the sugar gives a different type of boost than espresso and the mild caffeine in the chocolate is just perfect at times for late night .

[kidharris]

Originally Posted by musigenesis

You just have to drink it the way the Aztecs did: out of the skulls of your enemies.

What if you don't have any enemies?

[musigenesis]

Originally Posted by kidharris

What if you don't have any enemies?

Just sell a bus with the wrong transmission and suspension, you'll have plenty.

[matthews2001]

inappropriate, please grow up

[EastCoastCB]

Originally Posted by matthews2001

inappropriate, please grow up

What's inappropriate???

[Johnny Mullet]

He is referring to the other thread where this bus was sold and new owners had same issue. No need to throw any wood on this fire right now.

[Brad_SwiftFur]

Originally Posted by musigenesis

Just sell a bus with the wrong transmission and suspension, you'll have plenty.

Originally Posted by matthews2001

inappropriate, please grow up

Originally Posted by EastCoastCB

What's inappropriate???

In this context, meaning misrepresenting the engine/transmission a bus has, whether intentional or not. No big deal if someone is offering a bus with a given engine, transmission, suspension or whatever, as long as it's represented honestly. Equally acceptable "I'm not sure what it has but here's the VIN you can look it up for yourself".

[kidharris]

Originally Posted by musigenesis

Just sell a bus with the wrong transmission and suspension, you'll have plenty.

Evidently, LOL....But I don't think any of them would mail me their skulls to drink hot chocolate out of.