Borg Warner 1356 oil pump modification

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MechRick
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Borg Warner 1356 oil pump modification

Post #1 by MechRick » Thu Jul 19, 2018 9:56 pm

Since this is a common transfer case in Fords, and the failure can be catastrophic, I thought I would outline the problem and a workable fix.
My 1994's case had ~ 200,000 miles on it, including some recent trips to Sacramento CA and Dallas TX. I figured I was on borrowed time.

The (engineering) failure involves the oil pump locating tang, and a cast slot in the magnesium case. The tang wears through the case slot, allowing the pump to spin on the output shaft and not lube the case. It's a failure that gives no outward sign of trouble and will leave you stranded.

bw1356_2.jpg


A welder and a short section of 5/16" brake line will spread the load over the entire slot.

bw1356_3.jpg


bw1356_1.jpg


I'll clean the case up and give it some paint before I bolt it back in.
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1994 F150, 4.9L/ZF 5 speed, C-Vic police driveshaft
EFI head w/mild port work, 3 angle valve job
1996 long block, stock pistons, ARP rod bolts
Stock cam, aluminum cam gear
Hedman header, full mandrel bent duals, crossover, super turbos
http://fordsix.com/forum/viewtopic.php?f=2&t=73244
Bronco II with a 2.3L swap http://fordsix.com/forum/viewtopic.php?f=13&t=72863
1988 F250 2x4, 460 ZF 5 speed.

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