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The mkiv Supra Owners Club

Auto gearbox sump extension?


MONKEYmark

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just been looking at spare auto gearbox in back of astra, and had an idea. would it be worth getting the gearbox sump box extended to take more fluid as sort of a cooling effect.

just was thinking it might be worth getting the spare box extended or getting a new sump pan made.

just got 1 cooler fan at the moment, was thinking 2 coolers and sump extension maybe a couple of fans for coolers too.

would say an extra 1 or 1.5 l of auto fluid help?

 

going to have a go at taking it apart to see how it works.

 

also would the engine oil sump box be worth extending too?

 

any ideas?

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Originally posted by dude

Works well on the yank boxes just make sure it doesnt hang down any further than stock !!!!

 

Dude:flame Dev

i would have thought there would be lots of space to extend. enough for an extra liter or 2 of oil. will take off and take some pics see if anything can be done with it. was going to send it off to new zealand as its the guy who doing lees car. have seen some of his work and its amazing.
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  • 3 months later...

BFTD back from the dead

 

can anyone have a look how much clearence there is on the auto box transmission pan. need to know so the guy making me an all new custom tranny pan extension with cooling fins and temp probe and electronic gauge, also asked him to stick a tap on for easy draining. he is making me an all alloy part with electronic temp gauge. this is going to be a test, he can then make more if anyone wants one. they will be top quality. have seen some of his alloy welding and it is the biz.

 

i just want to know how much more i can go down to hold more fluid.

 

i am not sure if it will make much of a difference to cooling. he was saying with it been alloy it will (disipates heat better)

 

thanks for any info

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Originally posted by migster

Top man if you can get this all done it wil be a seller for sure, keep it up:thumbs:

thanks was not expecting that

he can also modify the standard pan but i wanted an all new one making.

it wont be cheap for first one but it is including an electronic gauge which he said is more accurate.

 

dudes fitting my new TC at weekend so he should have an idea how much room we have to play with

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Originally posted by Terminator

You really need a stock car for this, mine is too low already, but if you want a measurement I am happy to oblige, and provide other measurements for reference points.

that would be cool if you have time. does the bottom of tranny pan have anything under it. my car is on stock jap springs and sits high off the ground like a 4x4 jeep.

 

wondering if 2" deeper pan will be enough or too much

 

thanks again

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Originally posted by Terminator

I'll have a look in the morning. too pissed right now:p

 

thanks phil

 

just got this off him in email

 

Hi,

 

We don't actually make a mold off the first sump, we always make each one from scratch, its just that after I have nutted out the first one, I then have templates etc so the future ones are always quicker to make.

 

When you measure for the sump, see how much wider we can go and also how much deeper, keep in mind that it is better to have cooling fins on the bottom of the pan.

 

I can't start assembling Lee's engine untill I have the clutch and front pulley (these need to be balanced on the crank)

 

I have a couple of pix I can show you of his exhaust manifold,

 

 

 

he has sent me some pics of the custom manifold he has made for lee`s skyline and it looks the biz with the garrett gt42. i will post some pics up tommorow of some of his welding work. it looks great. he also has made custom swirlpot systems for the skylines too.

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Originally posted by dangerous brain

My garage mate suggested pouring the fluid down the dipstick hole, but surely that would take forever?

 

there's no other way in. it does'nt take long. alternatively get a full flush done.

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Originally posted by eyefi

there's no other way in. it does'nt take long. alternatively get a full flush done.

 

Erm whats wrong with the fill point on the top of the gearbox??? Well apart from being a total sod to get anywhere near. How do you go about a flush?

 

 

And ref that big picture what the hell is that contraption?? Looks like an early edition dalek:( Workmanship looks great though.

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A full flush requires some hose to cut out the cooler, run one end of the hose into a container and the other into new fluid and run the system to pump the new stuff in and old stuff out. There was a big debate about this a few years ago and full flushes should not be carried out on boxes that at have had good regular normal drain and change carried out. Something to do with fluid the additive level getting too high and causing problems in the converter. I am not sure if the threads will still be here.

 

 

Monkey, I had a grovel under the auto sump first thing this morning. These measurements are a bit basic but may do for starters.

 

To bring the bottom of the sump level with the bottom of my decact pipe 30 mm is required. Obviously you could go lower and could gauge the limit by looking at any decat car.

 

The addition of 50 mm ether side would be fine possibly more on the OS. That would add at least a litre.

 

If you drop the bottom 50 you have plenty of space behind the box sump and you could start pushing two litres additional fluid.

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Originally posted by dangerous brain

Erm whats wrong with the fill point on the top of the gearbox??? Well apart from being a total sod to get anywhere near.

 

u answered yr own question. the dipstick method is sound and no hassle.

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thanks for helping out phil. have passed on the details and asked him to go with 50mm each side and 50mm deep

 

john was saying i could hold more fluid in 2 tranny coolers.

 

will let you know when he makes me one up

 

thanks

 

hope it will help out with running cooler

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Running an extra 50mm deep will put the bottom of the sump 20mm below the decat pipe, not sure how this compares with the lowest point on the car. I think you should have some room to play with though, it will certainly stick the sump in a better position for cooling.

 

So a check is in order, pause for quick trip to the garage.

 

 

 

 

 

Just some more numbers taken on level ground

 

Decat to ground 96 mm

 

Lowest point on the car which used to ground on speed bumps on stock JDM suspension is my Hiper elbow!!! 82mm above ground

 

 

So on my car your 50mm drop sump would only give 76 mm ground clearance. 6 mm lower than my flattened exhaust elbow.

 

The space bar on my lap top is bigger than that.:eek: That’s less than three 50p's stood on top of each other, less than 3 inches, less than the length of a credit card. All at static ride height and no suspension load at all.

 

That’s what I call low.

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what do you think will be best then. just got a top secret bumper on my car and they sit low. when i go over speed bumps i always keep the exhaust side away from the speed bumps drive over them on 2 wheels.

i could ask him to do it to 30mm instead to be on safeside.

 

he said it wont take long to make up. was going to get him to make up a seperate smallish tank for methanol/water mix for the water injection and maybe a oil catch can,

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