C34 wesh plug mod

[whitenight27]

C34 wesh plug mod

Hi all. I know it might have been covered before i just don't have the time to look on all the pages.

I have a s1 c34 and am looking to do the wesh plug mod. The shop i am going to has done s2 but is unsure if s1 is the same.

I can't be with out a car if its different to do. 

So question is are they the same part and way to modd as s2?

[Duncan]

Is that for a drain at the back of the head back to the sump, or something else.  If it's a drain S1 is the same as r33 which I guess is the same as s2/r34 anyway.

[Trex]

As far as i am aware through extensive research, no one has done this to their s1. I contacted the two who have done the plug mod on their s2, one originally from aus, the other from the uk, and both boxes were still going strong.

 

Now.. I spoke to a local trans specialist who used to do work on the re4 and then grew his business and now works on amgs bmws porches etc . He was against doing these 'mods' like shift kits, plugs, these days as it puts too much strain on other components. Once you have fixed one problem, another will arise as it is now the weakest link. He went on to say that once it starts slipping with more power just buy new shift solenoids. From there you are better off buying a stronger transmission.

I had my car tuned around a year and a half ago, I'm not using the retard function on gear changes and the box has never slipped once from doing this. Box feels extremely tight and shifts a lot faster than standard. I wouldn't be surprised if it could handle 50+ more kw with no problems as a street car.

On std tune In 30 deg weather on throttle for about 30mins would cause the box to slip. I haven't been able to make my box slip since it's been tuned.

I posted all the information and lingo used in our conversation roughly a year ago along with his workshop number as he had great prices on the solenoids. I can't find it, but maybe with some clever searching you can  

 

I am far from a trans specialist, but i took his word for it as he has seen it all.

[Trex]

5 minutes ago, Duncan said:

Is that for a drain at the back of the head back to the sump, or something else.  If it's a drain S1 is the same as r33 which I guess is the same as s2/r34 anyway.

automatic valve body

[whitenight27]

Yeah its just the first to second i want to close the shift time on. Its not running a lot of power just first to second is so slow. 

[zoomzoom]

Its not too expensive to do the whole shift kit from MV (or equivalent) while you're at it. You have to remove the valve body anyways to put the welsh plugs in the accumulators.

1st to 2nd may be a little abrupt most of the time, but once you're on the move the downshifts are so much more satisfying. Easily beats many modern vehicles.

Id echo what Tom says, the gearbox in standard form can slip due to heat and even between different fluids. The valve body mods eliminate all those issues, assuming the material on the clutches are still in good condition