4-pin diff: the truetrac alternative - Defender Source
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Old December 4th, 2013, 08:06 PM
Status: Offline
David Crall
1996 Discovery
Join Date: Feb 2009
Location: Pittsfield, MA
Posts: 75
4-pin diff: the truetrac alternative

This differential is a great alternative to the front Truetrac if you want a strong differential but not the front LSD steering/handling effects. Pair it with a TT, Detroit, or ARB for the rear.

I sold my truck and need to sell it. MoD Defenders and Camel Trophy Discoverys used this diff. because they are many times stronger than the stock 2-pinion carrier, which is known to explode on occassion. The older units are hard to come by, so I had a P38 4.6 rear diff (LR 4-pinion) machined to fit regular Rover diff. housings (D90, D1, D2, RRC). The machine work was done by a machine shop and the bearing journal was mic-ed for accuracy. Small but necessary changes made in order to fit as a factory part.

over $400 invested ...but will sell for $150 shipped including new carrier bearings.

***Also have 2 cleaned and painted diff. housings, two 4-bolt pinion flanges, two sets of very good pinion bearings, two sets of good 3.54 diff. gears, and some shims. Great parts for a diff build project while your truck is still on the road.
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