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Driveshaft/yoke conversion u joints
 Moderated by: MaDMaXX, Mike69, NoPower
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 Posted: Thu May 9th, 2019 02:12 pm
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Wants A Torsen

Joined: Mon Sep 18th, 2017
Location: Grove City OhioUSA
Posts: 4127
Name: Jim
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While enduring a driveshaft conversion on a 5.0 Ranger, I learned a lot about U-joints.

Thanks to a company called Neapco we have options on conversion joints.

I started with a stock ranger driveshaft, 2WD, automatic. The 4R70W I put in turns out to be within 1/2" of the original transmission but the yoke was splined smaller and will not fit the 4r70w.

I had 2 4r70w yokes, one I bought on e-bay for the application and one from a crown vic thanks to black06xlt on this forum. Both fit the spline in the transmission just fine.
The e-bay yoke was an exact match for the Ranger U-joint, but the outside diameter was only 1.500 and was sloppy in the trans bushing. The Crown Vic fit snugly on both but has larger diameter U joints.

I quickly learned the terms OSR and ISR and lock-up, which is explained in the attached PDF.

The ranger shaft had 1.063 diameter cups and a lock up of 3.622 (I measured 3.615 but was squeezing, 3.622 seems to be the standard) and the crown vic yoke needed 1.187 diameter cups with a 3.622 lock up. There was a perfect conversion joint, the Neapco 2-3050 that I can just press in and it will work.

So my driveshaft was a little more complicated than I first thought but less complicated (and less expensive) than having it cut and balanced.

Attached is the Neapco PDF of all the joints they offer.

Attachment: neapco 2015_UJ_Dimensional_Reference_Guide_UJ2015D_9901018.pdf (Downloaded 2 times)

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 Posted: Thu May 9th, 2019 03:43 pm
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salvage auto dismantler

Joined: Sat Nov 25th, 2017
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Good info better save that

2006 ranger xlt ext cab 4x4 4.0 auto
1992 ranger xlt reg cab 2wd 2.3 5 spd (SOLD)
1996 explorer Eddie Bauer 5.0 AWD sold
1995 ranger splash reg cab 2wd 2.3 5 spd
2001 Explorer Sport Trac 4.0 4x4 auto
1998 Ranger XLT ext cab 4x4 4.0 auto
2000 Ranger XLT ext cab 4x4 4.0 5 speed
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