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Old 10-02-2010, 08:14 PM   #1
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NV 3550 in 87 Wrangler

I need help identifying the clutch master cylinder I have in my wrangler. It has the NV 3550 conversion, but does not have the stock clutch master cylinder. The name on the side of the master cylinder says Girling. I looked all over the net but I have been unable to find out where this one came from.

My bottom line is I need to replace the clutch master cylinder. Will a master cylinder from a 91 Wrangler work? Or should I buy a new OEM replacement. Will the OEM replacement be sufficent for the external slave cylinder?

Any help is much appreciated.

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Old 10-02-2010, 08:47 PM   #2
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Post up a pic of it, would make it alot easier to identify... In a perfect world the master cylinder piston/bore size should match the slave cylinders piston/bore size so it stays a 1 to 1 ratio.. Just using any master may ended up costing you in the long run...

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91 YJ, SBC V8, 5 speed, 8.8, 4" spring, SOA, 35" MT/R ............ Sadly I have sold my Jeep.
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Old 10-02-2010, 10:38 PM   #3
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Attached are some pics of the current clutch master cylinder.
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Old 10-02-2010, 11:11 PM   #4
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Hmmm, Nothing that i can remember coming across but it does share smiliarities with a standard 3/4 Girling master which a standard Clutch master for say a 91 YJ with a ax-15 has.. I know because i went through it when i converted to a retrofit system for my V8 swap....... If you want to be absolutely positive just pull the master, remove the piston and measure the inner bore..Should be a 3/4.. If you can take the stock Jeep master route and need a fitting to adapt your hydraulic line to (which looks threaded) use this adapter. Scroll to the bottom of this link to see the adapter for stock YJ/TJ master o-ring to threaded line.
Hydraulic Slave Cylinder Retrofit for Chevrolet Engines

Here's a master on ebay that work for you as well.
NEW GIRLING-TYPE ALUMINUM CLUTCH MASTER CYLINDER,3/4": eBay Motors (item 250337268239 end time Oct-25-10 08:52:08 PDT)

I hope some if any of this helps you..
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91 YJ, SBC V8, 5 speed, 8.8, 4" spring, SOA, 35" MT/R ............ Sadly I have sold my Jeep.
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Old 10-03-2010, 12:31 AM   #5
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Hi johnnrhonda7508. Nice clutchmaster cylinder. But I think you should clean it everyday. There is a dust on it. If you don't want to be broke easily just clean it everyday.
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