Gearbox oil matters
Author
Discussion

Munter

Original Poster:

31,330 posts

264 months

Tuesday 4th January 2011
quotequote all
On these cold morning the old gearbox was a bit "picky" about what gear it would allow you to use.

As it was time for the MOT (passed again, no advisories....not even the ones I didn't fix last year...), I got them to change the gearbox oil as well as the service (10,000 miles late for the gearbox).

A world of difference. You don't notice it slowly get worse but the difference now is brilliant.

Had to have new Aux belts as well as the front calliper unsticking...(a yearly feature...). But less than £300 and no minutes spent under the car on the drive in January, and a reborn gearbox. I think that's not a bad result.

tuttle

3,427 posts

260 months

Tuesday 4th January 2011
quotequote all
Did you use any fancy synth oil or anything?

Munter

Original Poster:

31,330 posts

264 months

Tuesday 4th January 2011
quotequote all
tuttle said:
Did you use any fancy synth oil or anything?
I don't think so. 75/90 "Synthetic" is on the bill. But the cost was ~£8.50. So if it was fancy that's a steal!

The stuff (time expired) it replaced was Silkolene Silktran SYN 5 75W-90 I think. Which was doing fine until last year, and must have been 6 years old and 60,000 miles on it at least.

Edit: As the Garage I use uses Castrol for everything else unless I supply it. I believe it's Castrol Syntrax Universal 75w-90.

Edited by Munter on Tuesday 4th January 16:44

DannyGi11

37 posts

218 months

Tuesday 4th January 2011
quotequote all
Jesus, mine's picky now and its only 18 month old, not even 14k miles under its belt!

Might see if my local garage could do this for me, I'm not entrusting to JCT600 again shoot

LukeBird

17,170 posts

232 months

Tuesday 4th January 2011
quotequote all
Mine's overdue as well, I will be getting it done come service time (around 4k miles I think).
I haven't noticed mine is overly sticky, but my car had done a lot of miles when I bought it and I assume it's never been done.

piefacemate

592 posts

194 months

Tuesday 4th January 2011
quotequote all
Is this doable as a driveway DIY job?

Odie

4,187 posts

205 months

Wednesday 5th January 2011
quotequote all
Yeah its easy, I used a 1mtrish length of plastic pipe run from the engine bay with a funnel in it to do mine.

You just need to make sure you take out the right bolt smile


I still haven't done the diff or the petrol filter...

MX-5 Lazza

7,954 posts

242 months

Wednesday 5th January 2011
quotequote all
And remove the fill plug BEFORE you remove the drain plug. You don't want to drain it and then find you can't get the fill plug out!

gdaybruce

763 posts

248 months

Wednesday 5th January 2011
quotequote all
Refilling the box is made a lot easier if you have a large syringe. I bought one of these a while back from a motor sports specialist on the web (I forget which one). It holds about a half litre of oil and it means you can just insert the plastic tube in the fill hole and then depress the plunger - no trying to squeeze the oil out of the bottle uphill or manoeuvering the bottle to get it above the filler hole. Not essential but it does make life easier!

youngsyr

14,742 posts

215 months

Wednesday 5th January 2011
quotequote all
gdaybruce said:
Refilling the box is made a lot easier if you have a large syringe. I bought one of these a while back from a motor sports specialist on the web (I forget which one). It holds about a half litre of oil and it means you can just insert the plastic tube in the fill hole and then depress the plunger - no trying to squeeze the oil out of the bottle uphill or manoeuvering the bottle to get it above the filler hole. Not essential but it does make life easier!
You can get large syringes on Ebay for not much money. Not sure if they go up to 500ml, but you can definitely get 100ml ones. Pretty easy to refill the syringe.

MX-5 Lazza

7,954 posts

242 months

Wednesday 5th January 2011
quotequote all
I've done a gearbox oil change with one of those syringes but never again. You end up with more oil on the floor than in the gearbox!
I have a simple in-line bulb-pump which I think is actually for syphoning fuel but it worked perfectly when changing the gearbox & dif oils on my car.

Edited by MX-5 Lazza on Wednesday 5th January 14:37

JFReturns

3,783 posts

194 months

Wednesday 5th January 2011
quotequote all
Made a slight difference to mine.

However, I replaced the upper and lower boots and that made a huge difference! Did it myself too - if anyone is interested, I took some pictures and did a bit of a guide in my Project thread