R2 slave to '87 master cylinder


Daniel Black

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I used a 90 ranger 7/8 bore master, 90 f150 slave which has the same part number as a ranger for luk on rock auto. And a 11 inch luk clutch from a f150 and 90 f150 flywheel. The way I bled it was with my friends hand pump from snap on.
I have an external slave cylinder. I think by '90 an F150 had switched to internal. My pedal has gotten softer now after putting a few miles on it. Basically the same pressure as the old style linkage and Z-bar type clutch, not terrible. Maybe it just needed time for the new PP to seat in or something.
 


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Shran

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What part number are you finding for the 90 Ranger that has a 7/8 bore? Everything on RockAuto says either 3/4 or nothing at all
 

Shran

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FWIW, the F150 would have had an EXTERNAL slave IF it had a 4 speed and an internal slave if it had a 5 speed. This applies to all years after 1982.

One exception to that is the F250 and larger 460 gas or 5 speed diesel transmissions that also had an external slave cylinder (the ZF 5 speed.) BUT, the 4.9/5.0/5.8 ZF 5 speeds had an internal slave cylinder, similar to the Mazda 5 speed that is in the F150s.
 

Mac

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I used a 90 ranger 7/8 bore master, 90 f150 slave which has the same part number as a ranger for luk on rock auto. And a 11 inch luk clutch from a f150 and 90 f150 flywheel. The way I bled it was with my friends hand pump from snap on.
You may think you have a 7/8" bore cylinder but bet it's only a 3/4". Took couple apart that were listed as 7/8" but only measured 3/4" Part was CMS39896..
 

Ramcharger90

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You may think you have a 7/8" bore cylinder but bet it's only a 3/4". Took couple apart that were listed as 7/8" but only measured 3/4" Part was CMS39896..
Idk maybe. Im Going by the RA listing it works so im not concerned.
 

Ramcharger90

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I have an external slave cylinder. I think by '90 an F150 had switched to internal. My pedal has gotten softer now after putting a few miles on it. Basically the same pressure as the old style linkage and Z-bar type clutch, not terrible. Maybe it just needed time for the new PP to seat in or something.
🤷‍♂️ maybe if it isn't slipping or not disengaging. Run it
 


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