zf5 to zf6 question - PowerStrokeNation : Ford Powerstroke Diesel Forum
 
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post #1 of 4 (permalink) Old 12-26-2012, 06:04 AM Thread Starter
BIG_RED
 
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zf5 to zf6 question

anyone know the gear ratios for gears 1 through 5 and 1 through 6 on these transmissions?

1996 F250:
-5spd w/4.10's
-3" dp to 4" straight pipe
-SouthBend ConOFE clutch
-K&N cone filter
-EBPV brake
-ISSPRO Gauges
-Custom E-Fuel
-Dana 60
-And now a custom front right fender.......
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post #2 of 4 (permalink) Old 01-04-2013, 08:31 PM
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Re: zf5 to zf6 question

OD is actually HIGHER on the ZF5 than the ZF6


S42 ZF5
Close Ratio
1st Gear:
4.14
2nd Gear:
2.37
3rd Gear:
1.42
4th Gear:
1.00
5th Gear:
0.77
Rev Gear:
3.79

S47 ZF5
Close Ratio
1st Gear:
5.08
2nd Gear:
2.60
3rd Gear:
1.53
4th Gear:
1.00
5th Gear:
0.77
Rev Gear:
4.66

ZF6


Low:
5.79
1st Gear:
3.31
2ed Gear:
2.10
3rd Gear:
1.31
4th Gear:
1.00
5th Gear:
0.72
Rev Gear:
5.23

courtesy of diesel brad

TJ

1997 f-350 7.3 powerstroke zf-5 3:55s diamond eye 5" straight pipe and 250,000 miles and counting

1978 f-350 getting some form of diesel transplant
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post #3 of 4 (permalink) Old 01-05-2013, 05:31 AM
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Re: zf5 to zf6 question

Quote:
Originally Posted by 7.3L F-250 View Post
OD is actually HIGHER on the ZF5 than the ZF6


S42 ZF5
5th Gear:
0.77


S47 ZF5
5th Gear:
0.77


ZF6
5th Gear:
0.72
While you are correct the number is higher, it is less overdrive. a zf5 at the same speed with run a higher rpm than a zf6. The zf6 has MORE overdrive, thus runs lower rpms at higher speeds.

24v cummins swap into a superduty here:

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post #4 of 4 (permalink) Old 01-05-2013, 09:19 PM
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Re: zf5 to zf6 question

sorry i just copy and pasted from a post a few months back and didnt think to reread the whole thing

TJ

1997 f-350 7.3 powerstroke zf-5 3:55s diamond eye 5" straight pipe and 250,000 miles and counting

1978 f-350 getting some form of diesel transplant
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