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Old 01-06-19, 06:49 AM   #1
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Default No gearbox oil change? I don't believe it.

Page 232 in my 308 user guide shows the same text for both manual and automatic gearboxes. My 308 gearbox is the EAT6 automatic and I cannot believe what the guide is telling us all. It says "The gearbox does not require any maintenance (no oil change)." This seems totally wrong to me.

Does anyone know if this is correct? Is there a mileage when the EAT6 requires an oil change? I know that Honest John believes that gearbox oil (especially in automatic gearboxes) should be changed at certain mileages and I was wondering if anyone has definite knowledge on this.

Thanks.
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Old 01-06-19, 08:42 AM   #2
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Im very old- school on this. Gearbox oil doesnt really work at any significant pressure, doesnt get particularly hot and tends to move very slowly so as a fluid its pretty chemically stable for most of its life. It sits within its own sealed metal box and unless it leaks out, water leaks in or bits of metal start dropping off the bits inside, it should never need tampering with as a system. In 40 yrs of motoring I have never done an oil change on a gearbox on purely "scheduled" reasons.
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Old 01-06-19, 12:32 PM   #3
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Auto boxes work very hard to absorb the excess torque the engine makes and this heats the fluid up it also has various brakes inside it that wear filling the fluid with dirty brake dust !!

OFF COURSE the oil needs changed but peugeot renault etc seem to think telling people it does not need changed makes the servicing costs seem cheaper and most cars are chopped in after 3/4 years anyway so any failures due to contamination are outside the warranty !

Most auto box failures are caused by dirty old oil and lack of oil due to the heat burning some off over the years.

If you want to keep your car more than the norm 3/4 years an oil change is a very good investment.

They will tell you its long life oil and all that rubbish but it still gets dirty

Manuals on the other hand are normally fine as they dont make the oil work so hard.
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Old 01-06-19, 12:58 PM   #4
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Quote:
Originally Posted by reliable406 View Post
Auto boxes work very hard to absorb the excess torque the engine makes and this heats the fluid up it also has various brakes inside it that wear filling the fluid with dirty brake dust !!

OFF COURSE the oil needs changed but peugeot renault etc seem to think telling people it does not need changed makes the servicing costs seem cheaper and most cars are chopped in after 3/4 years anyway so any failures due to contamination are outside the warranty !

Most auto box failures are caused by dirty old oil and lack of oil due to the heat burning some off over the years.

If you want to keep your car more than the norm 3/4 years an oil change is a very good investment.

They will tell you its long life oil and all that rubbish but it still gets dirty

Manuals on the other hand are normally fine as they dont make the oil work so hard.
Hi I remember watching a Wheeler Dealer episode Edd was working on a Porche that had a problem with auto gbox he changed the filter and oil in the gbox and it cured the problem just a thought
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Old 01-06-19, 02:57 PM   #5
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Thanks for your replies. Since posting my original question I have realised that a torque converter automatic gearbox (the EAT6) comprises two elements and both use oil. There is the torque converter itself which uses transmission fluid (oil) which is pumped and circulated via a filter to keep it clean and cooled then there is the auto-box itself which has its own different specification oil. This changes my original question to: -

I believe that the transmission fluid and filter need changing (every 4 years is it?) but it is not mentioned anywhere in the service book. Am I correct in this? If it does need changing then does the gearbox oil need changing as well at the same time or is it just the transmission fluid and filter that need changing?

Sorry for the confusion.
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Old 01-06-19, 03:02 PM   #6
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I would like an definitive answer on this too as Peugeot dealer told me it is a non serviced item.

re. the post above I cannot believe that they would tell you it doesn't need changing to reduce service costs, after all it is a cost that is passed on to us (the customer), manufacturers are usually guilty of telling you things need doing too much/too often...
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Old 01-06-19, 06:05 PM   #7
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I am taking it into Robins & Day on Tuesday morning so I'll report back after that.
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Old 01-06-19, 06:58 PM   #8
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The WHOLE gearbox uses the same oil there is no separate oil for torque converter and main gearbox

The reason they say sealed for life is to appeal to the fleet buyers etc not Joe public

The gearboxes are not even made by Peugeot they are Japanese boxes if you want the truth ask aisin Warner!

The boxes are fitted to most front drive cars some manufacturers specify oil changes others don't.
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Old 01-06-19, 10:24 PM   #9
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I dont know where u got ur info that the gearbox and torque converter use different fluids but its 100% wrong. You have a singular transmission unit which houses the gears and torque converter. It uses Automatic Transmission Fluid (ATF).

Their are two ways to service it.

1. Drain and refill - This will only change roughly half of the ATF as most will be stuck within the torque converter but worthwhile over doing nothing.

2. Transmission Flush - Most transmission specialists have a machine (many variations) that flushes out 99% of the ATF and replaces it with new.

I have had the transmission flush done at 30k miles and will continue to do so every 30k miles to ensure it is in good working order. I created a thread about it if u want to search for it.

Additionally, this notion about it being sealed for life is absolute nonsense. ATF works hard and even after 30k + sensible driving, the old ATF that came out mine was dark and degraded. Keeping that in the tranmission will lead to premature failure.

The EAT6 gearbox is made by Aisin Warner and has been used in countless vehicles around the world. I found various service schedules for it and most recommend servicing after the first 20k miles.
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Last edited by 2Stevo2; 01-06-19 at 10:28 PM.
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Old 02-06-19, 07:47 AM   #10
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Thanks for correcting me and also for mentioning the "Transmission Flush" method of changing the ATF. My car is almost 2 years old and still under Peugeot warranty for another year plus another 12 months extended warranty after that so does anyone know if Peugeot garages will agree to change the ATF given that it says it is not required? Because they see it as not a serviceable item maybe they are not geared up (sorry about the pun) to change the ATF using the "Transmission Flush" method? They may even refuse to do it. Does anyone know if Peugeot will offer this if asked and what it costs? I know cost is secondary since protecting the expensive EAT6 is priority but an idea of cost would be good. After the warranty expires I know I could go to a member of Fedauto ( Automatic gearbox repair find members for repair Fedauto ) and get it done but I expect the car will have done over 40,000 miles by then. Like 2Stevo2 I want to look after the EAT6 box. I will ask Peugeot and report back.
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