robertbartsch

OK so this has been a popular modification.

I just received my parts for a new clutch including a new master.

Upon inspection of the new unit, it appears the same as an old unit which has the restriction in the SS line where it meets the piston.

I'm planning to drill it out with a 1/8 inch drill.

Is everyone still doing this mod?

stoverz28

iTrader: (8)

http://www.installuniversity.com/ins...sity/index.htm

corvet786c

iTrader: (6)

if u have a manuel car u need to do this mod or u cannot shift at high rpms.

SuperSport4life

iTrader: (7)

really i take my car right to the limiter and i can speed shift just fine.

chromeplated500

iTrader: (10)

some ppl can... but ive been having that problem... that if im at high rpms i cant shift fast... (shifting faster than the fluid can go throught the small hole on the hydralic line.)

tasilver

iTrader: (2)

x2 for not being able to do high rpm shifts utill the drill mod was done. Night and day difference now it is a breeze. before the mod 1st to 2nd was a bitch maybe one out of 6 times it worked.

2QUIK4U

iTrader: (7)

I would definately do it before you put the new master cylinder in. It cant hurt anything and it helped my car alot.

robertbartsch

I used a 7/64 sized drill but is is very close to the 1/8th size.

_JB_

iTrader: (33)

I used 7/64s as well.

xBROKEx

iTrader: (7)

i did it and still have issues, im pretty sure a new clutch will fix it

Ericbigmac83

iTrader: (19)

i really need to get around to doing that mod....getting locked out bloooows

CranMaro99

iTrader: (10)

So why did GM think it was a good idea for the in line restriction?

Ericbigmac83

iTrader: (19)

helps keep the rear end in one piece......supposedly

Soul TKR

iTrader: (4)

DO IT! There really is a big difference...

robertbartsch

Apparently, GM knew the LSX engines produce lots of power and their 7 inch rears were not going to hold up.

I wonder if the masters on the Vettes have the restriction too?

Spiral04

I don't know if the vette has the restriction or not, but I was told by a local tuner not to do the drill mod on my vette.

Mr. Trick

iTrader: (19)

I dont really understand the instructions for the drill mod form install university. So what do you drill the master or the line? Sorry for the somewhat dumb question but I want to be sure I get the drill mod right.

_JB_

iTrader: (33)

The line. When you look into the end of the line that goes into the master, you will see almost a complete block in the line except there is a very, very tiny hole. You drill that out.

robertbartsch

Yeh, what he said^

Remove the master.

Take a small punch and push the pin out that holds the stainless line in the plastic master housing. Remove the line.

Now surround the line with a soft material and clamp it in a vice.

Drill the whole in the line out so it is able to flow more fluid - use a 7/64 or 1/8th size drill.

Pull the o-ring that is used at the end of the line and replace it at the tip of the line. Replace the line and drive the retention pin back into the housing to hold the line in the master.

Reinstall the master and bleed accordingly.

CranMaro99

iTrader: (10)

Dang it why didn't they put a stronger rear end on our cars... It's not like GM didn't know the 10 bolt is not strong enough.