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Power Strokes
94-97 Tech
ZF6 Install
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[QUOTE="Big Bore, post: 49366, member: 760"] I disagree. 1st on the ZF5 was always a compound low, 1st on the ZF6 is just lower, which allowed for a lower 2nd (since they added another gear) which is now [I]renamed[/I] 1st. The ZF6 allows you to run a taller differential gear and still have closer ratios than the 5speed. The ratios for a ZF6 with 3:73 axle ratio are closer together than ZF5 with 4:10 ratio. So you have the advantage of lower rpms on the hiway, with the ability to more easily stay in the power band. The OD (6th) is slightly higher also, so in addition to being able to run taller axle ratio, you get even more advantage running a slightly higher OD through it, which combined is in fact significant. It also allows a better takeoff gear than the ZF5, where you were either using compound low which would wind out too quick, or 2nd which required a lot of clutch slipping in comparison to the new "1st" in the ZF6. The oil lines are easily managed with a remote cooler, or swap your radiator for one from an auto truck. The other issues like transfer case and clutch master/slave cylinder are significant hurdles but not insurmountable. Worth the effort IMO. [/QUOTE]
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