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| ZF trans & gears https://coloradoclassicbroncos.com/viewtopic.php?f=4&t=7673 |
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| Author: | horseplay [ Mon Jul 27, 2015 6:29 pm ] |
| Post subject: | ZF trans & gears |
Curious how many of you are running ZF 5speed. What gear ratio & tire sizes are you running. |
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| Author: | landshark [ Mon Jul 27, 2015 8:01 pm ] |
| Post subject: | Re: ZF trans & gears |
35" tires and 4.56 gears |
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| Author: | horseplay [ Mon Jul 27, 2015 8:17 pm ] |
| Post subject: | Re: ZF trans & gears |
What RPM are you running at 55mph in 4th & 65-75 in 5th. Would you consider 4.88 ? |
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| Author: | sykanr0ng [ Mon Jul 27, 2015 10:48 pm ] |
| Post subject: | Re: ZF trans & gears |
You also need to ask what engine they have. A 5.0L / 302 has a different RPM range for best power than a 351 / 5.8L or a 400 and then there are the various strokers. I don't have it done yet but 34" to 35" tires (metric, next maybe?) and 4.88 is my plan. Engine? Explorer 5.0L or 5.0L based stroker. |
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| Author: | Digger [ Mon Jul 27, 2015 11:40 pm ] |
| Post subject: | Re: ZF trans & gears |
| Author: | Jesus_man [ Tue Jul 28, 2015 2:48 am ] |
| Post subject: | Re: ZF trans & gears |
351 EFI, 35's and 4.10's. That setup could cruise all day long on the Interstate with ease. But my rig is more of a crawler, and I want to go to a 37", so I may regear at some point. Or perhaps build more beefy axles in the gear ratio I need, while still maintaining the ability to travel 70+mph. |
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| Author: | landshark [ Tue Jul 28, 2015 8:58 pm ] |
| Post subject: | Re: ZF trans & gears |
I have a 400 (modified) runs about 2400 RPM at about 72MPH with 35" tires and 4.56 gears I can run it in 5th at 35mph - 55mph no problem, well under 1500rpm at those speeds but as mentioned because of the size of my engine it has plenty of grunt at those rpms. 4.56 seems perfect for me and my needs. If i went to 37's I would regear to 4.88. 33's I would move to 4.10's |
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| Author: | horseplay [ Wed Jul 29, 2015 10:51 am ] |
| Post subject: | Re: ZF trans & gears |
Thanks for the input sounds like 4.56 for a combination use is the way to go. |
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| Author: | Justin [ Wed Jul 29, 2015 12:51 pm ] |
| Post subject: | Re: ZF trans & gears |
That's what I'd do. I'll be running 4.56 with 37s, but am planning lower t-case gears. |
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| Author: | HIX [ Fri Aug 07, 2015 12:43 pm ] |
| Post subject: | Re: ZF trans & gears |
I am running 32s and stock gearing...doesn't help you out much but there it is. |
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