6 speed conversion in obs? - Ford Powerstroke Diesel Forum

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post #1 of 3 Old 09-25-2009, 09:28 AM Thread Starter
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6 speed conversion in obs?

Has anyone done a 5 to 6 speed swap in an obs before? What all would have to be changed? I know the 6 has an internal slave cylinder and the 5 is external, what about driveshafts, will they need shortened or lengthened? any comments or pictures are appreciated.

Nater
1995 f-250 rclb
7.3~317k miles & countin
3" Downpipe
Superduty 10.5" 3 pinion Trac-Lok rear
Dana 60 s.a.s

1997 ccsb , 353,500 miles
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Dana 60 swap, zf5 swap.
rosewood 180/100's, t500 hpop, php hydra, e fuel.
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post #2 of 3 Old 09-25-2009, 09:38 AM
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I know for a fact there is a thread on here somewhere, probably last spring. I'm pretty sure the verdict was no, guys feel free to chime in. Search function helps too...

2000 F250 7.3 ZF6 4x4 EC/LB 5" TBE
2003 Chevrolet LB7 Allison 1000 4"TB
2004 F450 6.0 5R110 9' MM2
2004 F350 6.8 5R110 8' MM2
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post #3 of 3 Old 09-25-2009, 11:08 AM
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It can be done. The question is why. The final drive ratios are the same and it just adds one more shift. You really have to be pulling some heavy stuff to make the narrower power band that important.

Brad
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