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Unread 11-22-2008   #1 (permalink)
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Default what cluster will work in 1988 Mustang?

How can you tell what cluster the car came with? either the 85mph or the 140mph. the car is an 88' GT. any suggestions? thanks guys
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Unread 11-22-2008   #2 (permalink)
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also will the newer gauges work in the car? is the oil psi warn, gas, warn, and fluid warn up inside the cluster on the 90-up gauge? if the harness is the same then i'll just get a newer one
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Unread 11-22-2008   #3 (permalink)
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All '88 Mustangs came from Dearborn with an 85 MPH speedometer.

'90-'93 cluster harnesses are not wired the same as '87-'89
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Unread 11-22-2008   #4 (permalink)
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i have a 140 in there right now and i've seen a couple on ebay that are 140 also. i wanted to double check.
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Unread 11-22-2008   #5 (permalink)
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Let me amend that.....All non-Special Service Package ("police") '88 Mustangs came from Dearborn with an 85 MPH speedometer.

OEM speedometers
'82-early '89 SSP = 140 MPH
'84-'86 SVO = 140 MPH (numbers only to 85)
early '89-'93 non-SSP 5.0L = 140 MPH
early '89-'93 SSP = 160 MPH

Ford Motorsport (aftermarket) speedometers
'79-'93 = 140 MPH

everything else = 85 MPH

SSP = 2 MPH increments after 20 MPH and "Certified Calibration" on face
Ford Motorsport = Ford oval and "Motorsport" on face (not on '83-'86)
Attached Thumbnails
what cluster will work in 1988 Mustang?-79-82-ford-motorsport-speedometer.jpg  what cluster will work in 1988 Mustang?-82-severe-service-package-police-speedometer.jpg  what cluster will work in 1988 Mustang?-83-86-special-service-package-police-speedometer.jpg  what cluster will work in 1988 Mustang?-83-86-ford-motorsport-speedometer.jpg  what cluster will work in 1988 Mustang?-84-86-svo-speedometer.jpg  

what cluster will work in 1988 Mustang?-87-89-certified-calibration-police-speedometer.jpg  what cluster will work in 1988 Mustang?-87-89-ford-motorsport-speedometer-m-17255-j.jpg  what cluster will work in 1988 Mustang?-89-140-mph-oem-speedometer.jpg  what cluster will work in 1988 Mustang?-90-93-special-service-package-police-speedometer.jpg  
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Unread 11-22-2008   #6 (permalink)
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Then there are also 170 MPH and 200 MPH speedometers refaced and recalibrated by BBK and Saleen.
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Unread 11-22-2008   #7 (permalink)
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ok so i have to buy the new 85 style gauge then right? i have seen a couple that have had the 140's in them. how would i put one of the newer 140's in there and have it read right?
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Unread 11-23-2008   #8 (permalink)
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I don't understand what you're wanting/trying to do.

Are you trying to put a '90-'93 cluster in your '88? OR just a speedometer? Or what?

Please explain. Thanks.
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Unread 11-23-2008   #9 (permalink)
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well id like to put the 90-93 cluster in the car. i know the warning lights on the 87-89 are not integrated into the actual gauge package but it on the 90-93. if the wiring harness is the same on all the cars, then the newer cluster will work right? isnt it just the clusters that are different as in motherboards on the back and that cooper wirinf that goes around the cluster? if not, i and wanting to buy a good cluster off of ebay that has the 85mph and swap out the speedometer to the 140mph.this car also has gears in it and i want an actual speedometer back.
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Unread 11-23-2008   #10 (permalink)
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You can use the 140 speedo, it's the air bag that got in the way of the speedo panel. The 140 will have a notch to accommodate the air bag unit, since the 1988 doesn't have one, that'll be no problem for you to use it.
The oil, coolant, gas, warning lights were GT model only, LX models didn't have them so the harness is NOT the same. If you want those lights, you'll need the proper harness to have the light connectors. If yours is a GT model, you should have it then.
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Unread 11-23-2008   #11 (permalink)
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yeah, mine is the gt. i know on the 90-93 gauges lx and gt that they dont have the warning lights seperate like that. my 92 didnt at least and i bought it new.
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Unread 11-24-2008   #12 (permalink)
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There are three different OEM '87-'93 140 MPH speedometers:

'87-early '89 SSP
late '89 5.0L non-SSP
'90-'93 5.0L non-SSP

Yes, you can get a 90-'93 speedometer to fit in an '87-'89 cluster. But the mounting points are not the same. See the pictures posted above. Notice the placement of the holes at the top and bottom of each speedometer face. OR you could just get the proper late '89 non-SSP speedometer or cluster, or an '87-'89 SSP speedometer or cluster.

As I posted previously, the '90-'93 cluster harnesses are not wired the same as '87-'89. There are about a half-dozen wires that are in different locations bwteeen the two harnesses. If you want to put a '90-'93 cluster in an '87-'89, you have to moves wires from one harness to the other, and vice versa. You'll need wiring diagrams for both clusters to know which wires to switch between the two.
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Unread 11-24-2008   #13 (permalink)
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thanks fox for clearing that up. i was looking at a diagram of the connectors for both styles. a couple changes, nothing major. i appreciate it. thats why i wanted to ask the professionals on here, you guys are awesome. once again, i thank you
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