Power Steering Pump Types
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Post Fiend
Joined: Jan 2000
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From: Metro Detroit (Redford)
Power Steering Pump Types
These descriptions came off the Motorcraft site:
CIII Power Steering Pump
The CIII is a belt-driven, vane-type pump used on newer Ford, Lincoln and Mercury cars and trucks. Smaller and lighter vehicles use the low-displacement cam inserts while heavier vehicles use the high-displacement cam inserts. An identification tag is attached to the housing that indicates the basic production and part number.
CII Power Steering Pump
The CII is a belt-driven, slipper-type pump with a fiberglass reinforced nylon reservoir used on older Ford, Lincoln and Mercury vehicles. An identification tag is attached to the housing that indicates the basic production and part number.
So would I be correct in assuming the CIII pump takes Mercon ATF, where as the CII pump is the old Type F ATF?
If so, then the main difference is slipper vs vane. Still wondering why Mercon would be bad for a Type F system. Many have used Mercon in Type F pumps with no problem.
CIII Power Steering Pump
The CIII is a belt-driven, vane-type pump used on newer Ford, Lincoln and Mercury cars and trucks. Smaller and lighter vehicles use the low-displacement cam inserts while heavier vehicles use the high-displacement cam inserts. An identification tag is attached to the housing that indicates the basic production and part number.
CII Power Steering Pump
The CII is a belt-driven, slipper-type pump with a fiberglass reinforced nylon reservoir used on older Ford, Lincoln and Mercury vehicles. An identification tag is attached to the housing that indicates the basic production and part number.
So would I be correct in assuming the CIII pump takes Mercon ATF, where as the CII pump is the old Type F ATF?
If so, then the main difference is slipper vs vane. Still wondering why Mercon would be bad for a Type F system. Many have used Mercon in Type F pumps with no problem.
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 787
From: Simi Valley, CA
3A674's
Eaton: 1953/64 and some early 1965's, steel reservoir attaches to top of pump: Type F
Ford: 1965/79 pump & reservoir some have steel, most have composition reservoirs: Type F
Ford: 1980/ Mercon, Dextron II, etc.
All were tagged.
Have no idea why Mercon, Dextron, etc would be bad for the earlier pumps...but these later fluids weren't used....at least on Fords, prior to 1980.
Ford: 1965/79 pump & reservoir some have steel, most have composition reservoirs: Type F
Ford: 1980/ Mercon, Dextron II, etc.
All were tagged.
Have no idea why Mercon, Dextron, etc would be bad for the earlier pumps...but these later fluids weren't used....at least on Fords, prior to 1980.
Last edited by NumberDummy; Feb 9, 2007 at 08:27 AM.
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 787
From: Simi Valley, CA
Originally Posted by TallPaul
My '92 Aerostar and '95 F150 both spec Type F for the PS.
What is amusing is Ford was wishy-washy...specifing one model one year to use one type of fluid, but the next year to use another type of fluid on the same model. Trying to remember which was used and which wasn't, caused many a parts guy to loose their hair, as we didn't have any references...that was the service departments realm.
And Ford's practice inre to what fluid to use, also included both manual and automatic transmissions!
Last edited by NumberDummy; Feb 9, 2007 at 09:52 AM.
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