Hi all hope everyone has had a great Xmas day with Family or Friends.

A quick question if anyone knows , what is the optimal operating temp of a gearbox , verses towing ( roughly) .

I read where someone had a gauge fitted and towing in auto it was 105 and in S mode it was 90.

I don't have a temp gauge on the auto trans so not aware of what temps it operates at , but thinking of getting one in the new year .

macka17 wrote:

---

Yea Dick.

Have a little read on it lad.
Then get back to me.
Better still. Ask your service dep't how much transm oil goes into your transm service.

Don't mention flushing. Just price a service and see how much fluid
they put into it..

Aus.
That's why a separate transm cooler is a bonus on Rad cooling only.
Talk to any transm tech on it. and the flush thingy.

Somebody needs to spend a little time on the spanners.

---

 Yea Mack.

Someone may need to spend a little time reading what you actually write as answers to questions on here.

For a start, Macka, (the man that should be 175 years of age), I am a qualified motor mechanic with decades of experience on cars trucks and earthmoving as well as farming equipment.

The OP asked a general question re trans temps...nothing else.

Re trans temps...many modern transmissions have more than one sensor and detect temperatures from different areas of the transmission. This is for diagnosis purposes. These temperatures may be accessed through the diagnosis port on varying vehicles. Many manufacturers DO NOT recommend the installation of external transmission coolers. You do the reading before blurting out last century practices.

Why you would suggest to anyone to fit a temperature sensor and an external cooler without even knowing what make of vehicle or even what type of transmission the OP has is beyond me, and probably many others on here. The OP has given no indication how he uses his/her vehicle either. In some instances the installation of an external cooler on the transmission may be fraught with danger in an off road situation.

Most transmission specialists and many dealers have the equipment to completely flush the auto transmission if necessary and not rely on just the removal and replacement of the pan. I am not being brand specific here.

So Mr Authority on everthing and Master of none, you do the reading and if you had spent time "on the spanners" as this "Lad" has you may offer more accurate advice and if just for once, if you actually re read some of the ramblings that you type you may just realise how inaccurate and last century some of your statements are.

And to be honest, your condescending attitude toward other people in some of your posts "pees" me off.

Signed

GEOFF.

Well I would think that the original Question was answered fairly accurately by the literature the poster read but to qualify the temp inside torque convertor can rise to 180c under extreme conditions,but I am fascinated by the amount of loose testosterone floating around the Forum

https://www.youtube.com/watch?v=vEvvRfuVk30

Have to agree with your post Dikodownunder, I think that Macka should have asked Santa for a new keyboard because a lot of his words have letters missing!!!!!

Chris

Diddums..
We did get our knickers in a twist. didn't we then. Chuckle.
Most on here ARE towing. (he also mentioned it)
And I also said as you finally got into.

Agents do have equipt to "flush" .
BUT as I also said.
the "normal" transm service just drops the pan. changes filter then tops up again.
NOT Flush. Normally 5 to 7 ltrs.

Temp's in this country. specially up North and across the middle. plus climbing,.
DO raise transm temps. sometimes to quite high levels.

MOST mechanics, specially Auto, in those circumstances.
DO recommend extra cooling facility

Regardless of what MFG's say. They just covering own arses.

IE Transm cooler in line.
And a "flush". is the only thing that gives full system of clean fluid.

The suggestions of coolers and temp sensors.
are only what most 4wders fit to their cars to keep better watch on the running gear
of their veh's.
AND a sensible thing to do to your $40\50\60k tow vehicle if you have any respect for it.

Being a "mechanic" you'd know that a transm run best, inside a certain temp range.
with regularly FULLY changed fluids.

Will last longer and give less problems
than the normal run of mill maintained veh that takes what comes with no extra maint.

And Unless fitted with latest, all gears lock up.
It WILL\does help itself, with a accessory Manual\auto Converter lockup fitted too.
WHEN TOWING....(he did mention that by the way)

You did do Transmissions in your trade training I suppose.
a 6 months Rolls Royce diesel course was part of ours in late '50's.

The factory guages that come fitted in 'most " veh's,
give 'average" readings in a certain range.
until temp's rise quite a bit first.
Then go into hot range..

My Patrol sat on 83 for near 14 yrs and never moved.
even with 6'5 mtr van , tinnie on top up in Terrirtory

This D.Max sits under second line on Guage. ALL the time again. regardless.

External read from 0 to 93\97 plus, on hills with van on.
Now. with cooler rarely goes above 87.

ANY extra. ACCURATE readings on any veh's mechanical workings.
Can only be an advantage in my and a lot of others eyes.

Read any 4wd book\magazines for a starter.

They mainly the "Practical" mechanics.

true experts on actual usage and effects of such in the real world.

And an external transm cooler. fitted in correct place.
will improve cooling and NEVER get damaged in 95% of accidients.

Mine a finned. tubular aluminium wall fits along inside of chassis rail
Where the rally and drag cars that they designed for are mainly fitted.

In line with factory front cooler

and perfect spot to link into and do full flush when required.


OH. Sorry. I could be wrong regarding them down South where you get cold.
But most are on way up here where it ALWAYS hot anyway.

Living up here you tend to forget.. Apologies again.
I'll readjust prev post.

"When using vehicles in HOT climates." OK

And No. I'm not 113, whatever.
just been lots of places. done lots of things in my life.
Same as many more than I have.

Unlike some that just stay in one place in one job all their lives.
I left home b4 13 and worked full time from then.
In a few country's on a few things.

ALL are adventures in life. and experiences in back of mind

Was Stamper on plates in rolling mills (Steelworks) for 3 weeks. YUK.. No thank's

kneeling on still glowing red plates stamping numbers on them for stock. 1954\5ish.

Then Trawlerman till army. Corporal VM (Vehicle Mechanic) in REME. UK Army
After, A Mobile plant fitter for a while till went operating.
MUCH more money and no grease up to elbows thank you.

Serv, maint ,own operated, Draglines and cranes and excavators.
Rode the hook for a while if my crane standing. Doggy.
(That was fun)
Pushed broom on nightshift on factory floors

and packed cardboard boxes on lines for spending money.

Managed tyre company branch. Trawlerman. wellpoint foreman. Concreter.
Worked on Motorways and gas pipelines,
when they were building them in '60s,'70's.'80's
Manager of tyre outlet for a while. Salesman.
and everything in between.

List goes on.

Just a normal. Travelling worker. Not bothered what I did as long as money came in
One of many in the world.

and did less than a lot of others too. Some. If they opened up.
Did a lot more than I could even envisage.
Specially the rig workers. THAT was a job. And Arctic or Atlantic fishermen.
Us on North Sea were only playing at it believe me.

Yea. OOOld Laptop, second keyboard too.

You gonna buy me a new one anybody? Chuckle.

Life is what a person makes it. Some believe Some don't. Suit yourselves.
Completely irrelevant.

Oh. And coolers. extra guages DO help....98% of the time shhhhh.

Bye diddums.

macka17 wrote:

---

Diddums..
We did get our knickers in a twist. didn't we then. Chuckle.
Most on here ARE towing. (he also mentioned it)
And I also said as you finally got into.

Agents do have equipt to "flush" .
BUT as I also said.
the "normal" transm service just drops the pan. changes filter then tops up again.
NOT Flush. Normally 5 to 7 ltrs.

Temp's in this country. specially up North and across the middle. plus climbing,.
DO raise transm temps. sometimes to quite high levels.

MOSt mechanics, specially Auto, in those circumstances.
DO recommend extra cooling facility

IE Transm cooler in line.
And a "flush". is the only thing that gives full system of clean fluid.

The suggestions of coolers and temp sensors.
are only what most 4wders fit to their cars to keep better watch on the running gear
of their veh's.
AND a sensible thing to do to your $40\50\60k tow vehicle if you have any respect for it.

Being a "mechanic" you'd know that a transm run best, inside a certain temp range.
with regularly FULLY changed fluids.

Will last longer and give less problems
than the normal run of mill maintained veh that takes what comes with no extra maint.

And Unless fitted with latest, all gears lock up.
WILL\does help itself with a accessory Manual\auto Converter lockup too.
WHEN TOWING....(he did mention that by the way)

You did do Transmissions in your trade training I suppose.
a 6 months Rolls Royce diesel course was part of ours in late '50's.

The factory guages that come fitted in 'most " veh's,
give 'average" readings in a certain range.
until temp's rise quite a bit first.
Then go into hot range..

My Patrol sat on 83 for near 14 yrs and never moved.
even with 6'5 mtr van , tinnie on top up in Terrirtory

This D.Max sits on 85 on Guage. ALL the time again. regardless.

External read from 0 to 93\97 on hills with van on.
Now. with cooler rarely goes above 87.

ANY extra. ACCURATE readings on any veh's mechanical workings.
Can only be an advantage in my and a lot of others eyes.
Read any 4wd book for a starter.

And an external transm cooler. fitted in correct place.
will inprove cooling and NEVER get damaged in 95% of accidients.
Mine a finned. tubular aluminium wall fits along inside of chassis rail
Where the rally and drag cars that they designed for are mainly fitted.


OH. Sorry. I could be wrong regarding them down South where you get cold.
But most are on way up here where it ALWAYS hot anyway.

Living up here you tend to forget.. Apologies again.
I'll reajust prev post.

"When using vehicles in HOT climates." OK

And No. I'm not 113.
just been lots of places. done lots of things in my life.
Same as many more than I.

Unlike some that just stay in one place in one job all their lives.
I left home b4 13 and worked full time from then.
In a few country's on a few things.

ALL are adventures in life. and experiences in back of mind

Was Stamper on plates in rolling mills (Steelworks) for 3 weeks. YUK.. No thank's kneeling onstill glowing red plates stanping numbers on them for stock. 1957. Then Trawlerman till army.
Corporal VM (Vehicle Mechanic) in REME. Army
After, A Mobile plant fitter for a while till went operating.
MUCH more money and no grease up to elbows thank you.

Serv, maint ,own operated, Draglines and cranes and excavators.
Rode the hook for a while if my crane standing. Doggy.
(That was fun)
Pushed broom on nightshift on factory floors for spending money.

Managed tyre company branch. Trawlerman. wellpoint foreman. Concreter.
Worked on Motorways and gas pipelines,
when they were building them in '60s,'70's.'80's
Manager of tyre outlet for a while. Salesman.
and everything in between.

List goes on.

Just a normal. Travelling worker. Not bothered what I did as long as money came in
One of many in the world.

and did less than a lot of others too. Some. If they opened up.
Did a lot more than I could even envisage.
Specially the rig workers. THAT was a job. And Arctic or Atlantic fishermen.
Us on North Sea were only playing at it believe me.

Yea. OOOld Laptop, second keyboard too.

You gonna buy me a new one anybody? Chuckle.

Life is what a person makes it. Some believe Some don't. Suit yourselves.
Completely irrelevant.

Oh. And coolers. extra guages DO help....98% of the time shhhhh.

Bye diddums.

---

 I for one am glad you took the time to tell is all your life story AGAIN.

It wouldn't be a bad idea if a few shared a little of themselves.

get to know WHO you texting with. Not just another faceless keyboard.

with few exceptions.

At least we all know what Geoff looks like anyway hey.
Volatile little beastie.

PS. How do you insert photo's on here. simply.

Then I'll frighten you lot.



PPS.

Hey Geoff.

That photo of mine is dated 1911.

You reckon "I" Could be hiding on there hey?.








Chuckle.

-- Edited by macka17 on Wednesday 28th of December 2016 03:54:32 PM

boab wrote:

---

i may be wrong Macka 17 but the auto used by rolls royce in the 50s was a hydromatic made by the general for buicks and chevs and very much doubt having worked on them would make you an expert on the later model autos that are programmed through a computer ecm

---

 You are correct boab, in fact RR took the generals product and tried to modify it because their engineers thought it needed refining but after failure after failure decided to consult with GM and found that it was better left alone. Any relationship between these early type auto transmissions and the modern day unit controlled by an ECU is like comparing chalk and cheese.

Without wanting to sound like my learned friend in the above posts the Hydramatic out of a Chev/ Pontiac was the first auto transmission I ever overhauled.

Probably right Boab.
I worked, (learned. was only a 18\19 yr old in those days) in the diesels mfg shops.,
Never went near the car section.
Like the body plant that was down off the "North Circular" in London.

Diesels sect was down near Shrewsbury from memory. Engines mainly made for shunters. Scammel trucks, which we used a lot with the D.T's. for moving tank
ecovery parts.
and Propulsion units for the Missile carriers/Transports that were't towed.
Mainly US derived.

From memory I recall the Transm was also linked . then. to Twin Disc converters.
With R.R you didn't do much actual Internal "learning".
Was Mainly exchange of units in the Champ's and Centurions\Conquerors.

REME used them as turretlesss, ARV and BARV's (Armoured Recovery and Beach army recovery vehicles)
to recover split track pins\blown tracks tanks in the field.
Hence the R.R part of training. How to unfasten a bolt, and retime Magneto's.

The ANTARS and Mighty ANTARS we used for transporting them were Leyland (Thornycroft then) from memory.
They ran cut down RR Merlins as did the Conq, and Cent.s
You know them things ran on dual Mag's. They were pricks.
But the engineering tolerances of them. Being Spitfire engines among others. was amazing.
They updated the Diamond T's for them. British from American. Diesel to Petrol
The idea was. Keep diesel for the civvy haulage\transport. Trains.
and have 90+ % Military on Petrol

One of them M AMntars filled the LAD workshop.
Some had electric drives to hubs too from memory (vague)

The DT were one of the few diesels used for military purposes and had lazy Fuller 4 .coggers
crash boxes with a 3? spd splitter. Some had a "gate" box.
Only Auto's I remember playing with were yank 2 speeds and a coupla 3 spd.
POM were all Manuals.
I remember first time I got into a M,Antar to move it. 20 ft wide and 50 ft up. Felt like.
and driving a Centurion tank with A Frame and winches over the firing ranges. GOD.
Invincible. and all of 18 yrs old. ooold memories hey.

The Austin Champs (R.R powered)were basically 100% a mecano box. Unit out. unit in. Off to wksps.
and the number they cracked the chassis in half on when dropping out of transports wasn't funny.
Too heavy, they used to come down at 50 miles an hr looked like. Zoooom. Crunch, bounce. thud.
Start walking.
We got quite adept at stripping those things down in the field.
At least the L. R.'s bounced and then drove.

We should really get away from this memorising, and back to Transm temp's hey.
Me anyway, pills working well at present.

Floooooaating.

mezza56 wrote:

---

Hi all hope everyone has had a great Xmas day with Family or Friends.

A quick question if anyone knows , what is the optimal operating temp of a gearbox , verses towing ( roughly) .

I read where someone had a gauge fitted and towing in auto it was 105 and in S mode it was 90.

I don't have a temp gauge on the auto trans so not aware of what temps it operates at , but thinking of getting one in the new year .

 

 

 

 

---

Hi Mezza,

Around 80 to 90 degrees celsius is ideal, however it is not uncommon for temps to elevate above 100 for short periods - and this is not fatal to the trans - but should be avoided for long periods.  

The behaviour of automatic transmissions on modern vehicles will vary between different models of vehicle, even when the same make and model of trans is used across different brands of vehicle.

The temp displayed on 'off the shelf generic diagnostic tools' (such as scan gauge etc) will depend on which sensor is being used for the display output - for example, temp readings of fluid taken around the torque converter will differ to those taken post-cooler.  Unfortunately, most of these consumer-standard tools do not provide the user with this level of information.  However any idea of what temps you are experiencing is a good place to start :)   

I think every now and then us OLD blokes loose ourselves, get derailed , get away from the original Tech Question and it always ends up like the age old question "Who has got the Biggest" then the original question is lost. I suggest that this scenario is happening so often now that it shows some human short comings so to keep us all on track I suggest click on the link

 https://www.google.com.au/?gfe_rd=cr&ei=pHBkWOHFE6Hr8Af3uKrQAw&gws_rd=ssl#q=narcissism

All bull**** aside.
I'm just trying to get people to talk about themselves a bit.
There would be a lot of interesting lives on here.

Unfortunately.
It seems to be a big closed book.
Everybody just hiding behind their keyboards.

You wouldn't know who was what or what anybody had ever done.

Shame really.
There could be some really interesting stories here.

PS Ants.

Where have I been throwing insults. None that I recall.

It's what's known as trying to open people up a bit. get some story's going.
We've ALL done something.

Maybe if people shared a bit.
These places wouldn't be so cold and mechanical hey.

Hiding behind the keyboards is not very sociable is it.
Knowing what individuals had done in life would maybe?.

help to get better answers to questions too
while knowing which answers were likely to be nearer the mark.
Or is that too simple.

People should share a bit

remember. Peoples experiences are what make them.