F450 Going from 4r100 to zf5 or zf6 with 4.88 - Ford Powerstroke Diesel Forum
 
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post #1 of 6 Old 11-19-2012, 08:25 PM Thread Starter
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F450 Going from 4r100 to zf5 or zf6 with 4.88

Here is a question for a friend of mine with a F450 dually and he just wants to know which manual trans would have a better final drive with the 4.88 gears he has and what would be need for the swap a basic list of parts main concerns are axels and yokes transfer case and comfortable cruising speeds and decently low rpms when cruising thanks I know this is a tall order and any info is appreciated!

1997 F250 7.3 powerstroke SCLB HD XLT
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Future mods: ??? 1.5 Sticks T500

1996 ECLB XLT SOLD
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post #2 of 6 Old 11-20-2012, 06:48 AM
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a donor truck will eliminate all your parts needs, as far as gear ratio go to randys ring and pinion they have a calculator that will tell you what the rpm's will be.

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post #3 of 6 Old 11-20-2012, 06:58 AM Thread Starter
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His truck is the crew cab custom flat bed style Superduty what would be a good donor truck for that and I think the final drives for the two manual Trannys are about identical in final drives how does the auto 4r100 final drive compare to the manual zf6 tranny he tows a 35ft goose often hauling tractors and dozers thanks for the response

1997 F250 7.3 powerstroke SCLB HD XLT
340,000 Mi.
Blown Tranny Mod
D60 Swap
4:10's
DIY E-FUEL
PHP 6 pos.
S&B CAI w/Prefilter
EBPV Delete
3" DP
Kitty Delete
Cat Back 5"
Aeroturbine 5050XL Muffler
6" Vented Tip
S.S. HPX
17"X10" Pacers
4" Rough Country Susp. Lift
KW 17 LED CabLights
35"X12" BFG KM2's
Tint 20%
Magnum CB 104" Whip
Quad A-PillarPod
GlowShift Digital Gauges

Future mods: ??? 1.5 Sticks T500

1996 ECLB XLT SOLD
1997 ECLB HD SOLD


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post #4 of 6 Old 11-20-2012, 07:27 AM
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any manual truck is a good donor, provided you can get one with the tranny still in it, as far as gear ratios, look at randys ring and pinion website, and yes it is better to tow with a manual than an auto especially when your talking about dozers and what not, but thats my personal opinion

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post #5 of 6 Old 11-20-2012, 01:50 PM
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I love towing with my man trans truck... wish my dually was a stick too.

The ZF-6 is a better choice, it has the same or simular final drive ratio, but the added low gear is great.

Greg

'99 E350 DRW Stahl 11' util box van, 7.3 PSD, stock. 138k SOLD

'00 F350 extcab, 9' utility bed, dually 221k

E'99 F250 extcab, S/Bed 211k

'00 Excursion Limited, 7.3PSD 281k

'84 Chevy K-30, 6.2L TD, woods/trail beater. 141k

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post #6 of 6 Old 11-20-2012, 07:36 PM
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From what I've heard, the 6 is stronger, too. But as far as final RPM is concerned, with 4.88s, that motor is going to pretty wound up at speed, even in high gear.

2001 F250, 7.3, Automatic, 4x4, 33's, Leveled, Cobra 29 CB Radio, Single Firestick anteanna, Pioneer Head Unit, Riffraff 6637 Intake Kit, 4" turbo-back straight pipe, Dual Alternator Upper Radiator Hose, AutoMeter Boost, Pyro, Trans Temp, Delta Toolbox, Gooseneck Hitch and a heavy right footed driver...

Wishlist: 160cc single shots, GT38r, BTS, SRP 1.1

REAL TRUCKS DON'T NEED SPARKPLUGS!!

Lord, please take care of this drivin' fool...
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