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Misc Electrical & Gauges Post your speedometer, gauges, interior and non audio/video questions here.

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Old 02-18-2019, 05:02 PM   #21

4x4junkie's Avatar
Join Date: Aug 2001
Location: So. Calif (SFV)
Posts: 10,055
Vehicle Year: 1990,1994
Vehicle Make: Ford
Vehicle Model: Bronco II, Ranger
I use this vehicle for: Crawling over things
Rep Power: 10
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I put a 95A 3G alternator from a '95 F-150 (300 I6 engine) on my '90 2.9L... The alternator itself bolts up exactly to the 2.9L mounts, other than I recall having to use a different upper bolt or something very minor (I've since removed it to swap to an on-board welder setup, which I had to modify the upper mounting bracket for).

There are some slight electrical modifications that are needed for the 3G unit (which is for the better anyway, this gets rid of that crappy shit plastic plug that likes to burn up on the 2G units), and you'll need to swap the V-belt pulley from your old 2G alt onto it.

This was the best mod I did before I changed to the onboard welder (before that I had tried a 2G unit that was "modified" to be 100A, but even with everything in good order, it couldn't maintain voltage at an idle, which I later found out this is common with such modified alts). The 95A 3G unit however worked flawless.
'90 Bronco II XLT
5" lift (Skyjacker Jeep coils), D35 & 8.8" w/5.13s (locked), 1354 dual T-case, 35x12.50s

'94 Ranger XLT
6" Skyjacker, ARB D44 front, Detroit 8.8" rear, Atlas 4.3, 33s
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