Sport Trac rear disc brakes on Ranger - Ranger-Forums - The Ultimate Ford Ranger Resource


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  #1  
Old 01-23-2011
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Sport Trac rear disc brakes on Ranger

Hi , Has anyone changed thier drum to disc on the rear of a Ranger ? Thanks Bud
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Old 01-23-2011
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Check out this thread, myself and several others are running cobra disc brakes.

https://www.ranger-forums.com/f59/ho...ear-end-95557/
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Old 01-23-2011
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If you have a 28 spline rear 8.8, you can't use the ST discs. They're a 31 spline axle, so the backing plates are different. Follow Michael's link.
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Old 01-24-2011
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you can use the whole axle though...
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Old 01-24-2011
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Yeah, you can but I don't think the OP was asking about the whole axle..
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Old 01-24-2011
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How do you find out how many splines your axle is?
Say like for example a 2003 FX4...
Thanks.
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Old 01-24-2011
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Quote:
Originally Posted by sprocket226 View Post
How do you find out how many splines your axle is?
Say like for example a 2003 FX4...
Thanks.
pull an axle shaft and start counting....
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Old 01-24-2011
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Quote:
Originally Posted by sprocket226
How do you find out how many splines your axle is?
Say like for example a 2003 FX4...
Thanks.
Look at the tag on your rear diff. It should have 5 digits on it. The first 3 are your FDR, the last two are your size (7 5 or 8 8).
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Old 01-24-2011
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Quote:
Originally Posted by Dangerranger01 View Post
pull an axle shaft and start counting....

I did a search, threre's a ton of info here, from what I gather an 03 FX4 has a 28 spline, and the FX4 Level II has the 31.
Going to start snagging the parts so when spring hits I can do the conversion.
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Old 01-24-2011
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Another way is measure the circumference of the axle tubing. Divide by pi and that will give you your axle tubing diameter, the level 2 31-spline is 3.25" IIRC.. The 28-spline is 3.00" or 2.75" IIRC. It's a pretty noticeable difference in diameter just looking at it though.
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Old 01-25-2011
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i think i read somewhere that the 28 spline in 2.75"

the mounting points on a ST 8.8 and a ranger 8.8 are the same?
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Old 01-25-2011
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i think i read somewhere that the 28 spline in 2.75"

the mounting points on a ST 8.8 and a ranger 8.8 are the same?
Same vertical axis... Except the ST's are SUA, and rangers are SOA...
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Old 01-25-2011
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ok, thanks.
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Old 01-25-2011
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another interesting tid bit: 2001 Sport Tracs came with 10 inch drums

02+ Came with the regular Expo disks.
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