I'm looking to replace the Powertrax differential in my 1936 Ford V8 rear end. I want a Torsen type differential and keeping with American brands makes finding drive shafts easier. The Detroit True Trac for a modern Ford 8.8 axle looks doable and it's made for 28 spline axles. However, in order to know if it will clear the pinion support bearing I would need to know the outside diameter of the differential housing. Anyone got access to one and willing to take some measurements? /Mikael Posted using the Full Custom H.A.M.B. App!
Sorry for the delay: Measuring-tape-grade measurements (within 1/8in) as follows: Gear case diameter: 5 inches Width between the insides of the bearing seating surfaces on each end: 6 inches Ring gear flange diameter 7 inches The plate in the center of the photo is an access hole, most 8.8s (not the IRS pumpkins or 8.8s with Moser 9in bearing conversions) use C-clips to retain the axle shafts, this plate covers the C-clip/spacer plug access and is held in with a snap-ring. I'll note that while Eaton may be an American brand, these things are now made in Taiwan... They're also made for Ford 7.5s and Dana 30/31s if the 8.8 unit's too large (the latter diffs are often used in 2xx/7xx RWD Volvos over here, so there might be someone in your area who's got one), or possibly the Torsen from a fourth-gen Camaro SS/Trans Am WS6 7.5in 10-bolt.
Thank you, My limiting diameter is 4.8503" so it looks like I would have to look for something else. /Mikael
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