Are not 76-78 axles longer than the rest? AFAIK the mini truck hub bodies are all the same length, solid axle or IFS. Maybe you need the silver faced hubs from a Pig?
Also the clip in the end of your axle on my truck is right up against the inner sleeve of the hub (what a PITA to get that on, I have to use a cheater bar). That seems to me to indicate the hub is too short, right?
'91 Pickup - Imelda
'08 Tacoma TRD - Donna
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