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Old 01-26-2020, 11:57 PM   #10
'63GENIII
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Join Date: Sep 2008
Location: San Carlos, Ca.
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Re: Rockwell t221 gear slop

Id say if it's not leaking, she should be ok. After doing seals, mine held oil for a while but I think it needed bearings as well which led to it leaking after a few months.

I do know that the 221s get a little hotter than say a 205 but I think as long as you're running good fluids and not overthinking it, it should run as it was designed. Long as it has fluid. They're always going to be loud though. Straight cut vs helical cut gears. My '57 Napco had a Spicer 23 or 24. When in 4wd, that thing made a 221 sound quiet.

Again, straight cut gears.
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'63 k15 long step
Vortec 7.4 - L29 Blackbear tune, Five 0 Motorsports injectors, Chris Straub Cam, NV4500, divorced 205
52" front and 63" rear spring swap
D44 / 14bff - disc axles
Milemarker 9K and 10.5K hydraulic winches

63" & B52 Spring Install http://67-72chevytrucks.com/vboard/s...ng+swap+thread


NV4500 Reverse Build Thread http://67-72chevytrucks.com/vboard/s...=reverse+build

L29 - 7.4 Vortec Build http://67-72chevytrucks.com/vboard/s...&highlight=L29
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