Gibbo said:
Hi there
Though I am pretty damn happy with my gear box as shifts feel pretty great, though it can be a little to notchy particular in mornings and as the whole of the US seem to rave about how things improve so much when changing to a premium gear box fluid, I've gone with the fluid that seems to be an internet sensation.
I've also gone with diff fluid as well, I feel that on a new car and after a track day it is probably good practice to put fresh fluids in as quite a few reports of diff fluid in particular being black and full of metal shavings after 1000 miles.
As its easy to do and cost circa £125ish it just seems good practice and if I get half the improvement the US guys mention then great stuff if what already feels like a great shifting action improves further.
Here is the kit:
http://www.opmustang.com/store/p7/BG_PRODUCTS_COMBO_KIT_2015_AND_UP_MUSTANG.html
I shall report back on if the car feels different, positive or negative in any way after doing the fluid change in a couple of weeks.
So the kit arrived pretty quick, less than a week from DHL and there was £39 in custom charges which you have to pay online before they deliver with DHL but was pretty straight forward.
This is a complete kit so it comes with everything you need, pumps, dip stick, cup, oil, sealant tape, all you actually need is a bowl to drain into, rag and 3/8 ratchet.
As my drive is raised I decided to change the rear diff oil myself as the differential is easily accessible.
So I undid the fill plug and as instructions suggest no oil came out as the oil fill from factory is about 10mm below the fill hole, easily checked with dip stick provided. I then loosened lower bolt and put bowl in place and removed bolt. What came out was black:
So I pumped some fresh into, about two pumps until what drained out was also bright green in colour and no longer black. I also cleaned both diff bolts as they are magnetic and were filthy and full of metal fragments, so a good clean before re-install.
Then pumped until air, checked using dip stick and was low so as instructions suggest tilt bottle and pump more, did this until oil was upto level on provided dip stick.
When I go garage on Friday to do gear box oil change I shall double check diff level and top up as necessary.
One word of advise when putting the sealant tape onto the bolt threads only put a little on, I put quite a bit on which meant it took some good strength to tighten the bolts all the way back in, so less is more.
Instructions say to drive gentle for 100 miles to ensure the oil gets everywhere it should and then good to go.
Went for drive, car seemed fine, no changes but I suspect this is kind of thing is not noticeable and is just for differential longevity and reduced running temperatures.
The gear box oil is the one which according to the 100s in the US who have changed to this oil notice an instant improvement in gear changing quality so lets see.
But the kit from [MENTION=22413]Optimum Performance[/MENTION] is absolutely spot on and makes it a very easy job to do, any garage could do both the diff and gear box in less than an hour with ease, maybe even 30 minutes.
