I need a new clutch slav/master cylinder. While looking at parts, I've come to realize the local parts store only has an 11/16" bore. The slave I bought is a 15/16" however. Is this going to work?

It is a 5spd getrag. Thanks in advance

Reported earlier in PFF, clutch master cylinder bore for all Fieros is ø 11/16" or .6875"

BTW, I measured the bore of the master cylinder from a 1988 Coupe (4 cylinder) and it showed ø.700"

Slave cylinder diameters (reported earlier, here on Pennock's):
--Isuzu (used on 4-cylinder Fieros): ø 13/16" or .8125"
--Getrag (used on V6 Fieros): ø 15/16" or .9375"

Hope this info helps you

------------------

Can anyone verify the GM part # for the 88 Getrag V6 Master?

I have # 10079730... is this correct?

------------------

Profile? In 20 years... Auto Detailing, Auto Body, Classic & Antique Restorations, Mechanic, Engine Performance Specialist, Porsche-Jaguar Tech, Wholesaler, Sales, Independent Full Service Repair Shop, Vehicle Vinyl Graphic Design and hard-core auto / aviation enthusiast... now searching for a new career. What a ride!

quote Originally posted by Skybax: Can anyone verify the GM part # for the 88 Getrag V6 Master? I have # 10079730... is this correct?

According to the P-book, the clutch master is P/N 10079730 for all '87 and '88.

Thanks Mark.

Still available and just ordered one from GM parts direct.

I'm flushing the line and putting on a new GM master & GM slave.

After reading the horror stories over the years I'm not playing around.

Someone correct me if I'm wrong, but as I understand it:
- The brake system on 88's are unique to that year, including the master cylinder, rotors, and pads.
- The 88 master cylinder has a smaller bore (0.985") than the pre-88 units (1.0").

Also, can someong verify that the 10079730 number is valid for 88? What page of the "P-book" is that on?

Edit: The number I found in my P22 manual is 18014638.

[This message has been edited by Formula Owner (edited 02-18-2005).]

The AC Delco number is 385096 and they show it to be the same 85 thru 88.
Don

quote Originally posted by Formula Owner: Someone correct me if I'm wrong, but as I understand it: - The brake system on 88's are unique to that year, including the master cylinder, rotors, and pads. - The 88 master cylinder has a smaller bore (0.985") than the pre-88 units (1.0"). Also, can someong verify that the 10079730 number is valid for 88? What page of the "P-book" is that on? Edit: The number I found in my P22 manual is 18014638.

This thread is referring to CLUTCH master and slave cylinders, not brakes...