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[rds]

Hello

has anyone on the forum done this successfully?

I've sourced spare sumps just in case and was thinking of putting a drain plug kit in each sump of the AR25 box.

Although the sumps seem to have provision in their sides for an OEM drain because of the shape (perhaps in previous incarnations of this box?) If I follow the two most obvious places on the rear of each sump, and use them for the drain location, the result would be one on each side of the car. I suppose this poses no practical difficulty if using a large enough container, unless anyone can suggest otherwise, and the filler is on one side of one sump anyway.

I've tried to insert a pic or two to this thread but without success! (doesn't bode well for the job does it???!)

cheers

RDS

[biggriffin]

Considering, the oil only needs dropping ever 80k, when you take the stumps off to weld in the bungs, you've all ready drained most of it out, then you need to remove the filter, so ask yourself, is it worth the aggro, of tigging  two bungs in the stumps, in my world, not worth the hassle.

[STEMO]

Considering, the oil only needs dropping ever 80k, when you take the stumps off to weld in the bungs, you've all ready drained most of it out, then you need to remove the filter, so ask yourself, is it worth the aggro, of tigging  two bungs in the stumps, in my world, not worth the hassle.

That seems logical, Mr Spock 

[amba]

Auto box is one of those things that if it aint bust and working properly best left alone.

Given that ATF is good for nearly 100k most Omegas will only ever see 2 changes in their life at best ,unless issues with box.

Agree with Mr.BG for the effort its not really a necessary mod although would of been a good idea at the original design stage by GM

[rds]

Points taken, thanks, but the kit requires a simple drill through and nut each wound over the end of a hollow bolt. The hollow shaft has its own drain bolt, so no welding necessary, washers of course are used!

Has anyone done it? If so where did they drill through?
What other incarnations of the AR25 box had the drain installed?
Can you drain using suction via the fill/level plug?

[Nick W]

Points taken, thanks, but the kit requires a simple drill through and nut each wound over the end of a hollow bolt. The hollow shaft has its own drain bolt, so no welding necessary, washers of course are used!

Has anyone done it? If so where did they drill through?

There isn't a lot of clearance inside the sump, so you would have to be very careful where you put the hollow bolt.
I've thought about this, and if I ever have to remove the main sump would weld an M14 boss to the vertical rear edge of the main sump. This would allow use of the same £1 drain plug as in the engine sump.


Not having a drain plug on the trans is inconvenient. Deleting the dipstick/filler as used on the earlier boxes that the 4L30 is based on was a truly stupid idea.

[VXL V6]

Sassanach did this mod on one of my cars. Does allow you to save yourself an ATF shower 

[Shackeng]

Points taken, thanks, but the kit requires a simple drill through and nut each wound over the end of a hollow bolt. The hollow shaft has its own drain bolt, so no welding necessary, washers of course are used!

Has anyone done it? If so where did they drill through?
What other incarnations of the AR25 box had the drain installed?
Can you drain using suction via the fill/level plug?

Yes

[cam.in.head]

Simple solution.i did mine by drilling an 8mm clearance hole in the bottom,near front away from any internals.then used an m8 x15 flanged bolt with copper washer through hole with an upside down castelated nut welded inside.

[rds]

There isn't a lot of clearance inside the sump, so you would have to be very careful where you put the hollow bolt.[/quote]

I had the same fear: I was planning to take the filter off and try to gauge how much clearance there is; the error for margin is quite small as to where the drain can go when you consider the diameter of the kit's washer.

From what you are saying, I assume that the edge of the filter is tight up against the inner surface of the sump all round the filter's perimeter?

[Marks DTM Calib]

I have done this on a few many moons ago.

In my case I braised a nut onto the inside of the sump pans and then added a few notches to it to aid draining.

[rds]

So drain not on the side but on the bottom of the sump?

[Webby the Bear]

This is just my opinion and how I do it.

Oil sucker with slightly bent tube to get right to the bottom of the pan. Refill using a Cuprinol fence sprayer as per the guide. Spot on.

I did mine few weeks back and got 3.5 litres out. I just repeat this at every service.

[Shackeng]

This is just my opinion and how I do it.

Oil sucker with slightly bent tube to get right to the bottom of the pan. Refill using a Cuprinol fence sprayer as per the guide. Spot on.

I did mine few weeks back and got 3.5 litres out. I just repeat this at every service.

Ditto

[rds]

cheers both, i'll give the suction draining a go, then drop the sump and change the filter. As for filling, i was going to use the same pump rather than buying yet another tool, although having read the guide, i can see the benefit.

I'll aim for 3.5L at least!