ZF6 Trans. - PowerStrokeNation : Ford Powerstroke Diesel Forum
 
LinkBack Thread Tools Display Modes
post #1 of 7 (permalink) Old 01-13-2010, 01:50 AM Thread Starter
PSN Local
 
Join Date: Jul 2009
Location: Ohio
Posts: 56
ZF6 Trans.

I have the six speed Zf6 tranny in my 05 F-250 and i have heard a few different numbers about what the tranny can take clutch aside. What numbers can the internals take before they give? also i was told there are no build kits for these trannys. no built gears or forged anything. any help would be great thanks!...also........ I was hoping someone has gone over 500 with their ZF6. My goal is 500 hp. My buddy with a 04 1/2 dirty with a zf6 has a PPE and a fass with a south bend dual disk and his is all messed up....we think its the fly wheel or somthin. its a beach and a half to get into gear. he heard from someone that the ZF6 can only hold up to 500 and his truck is roughly at 445 were guessing with his mods going by other ppl's dyno runs with the same set up. anyone else have any say on the subject? Thanks!
Reply With Quote...i had both these postes in the 6.0 aftermarket section but i didnt get a whole lot of help.
boyonblue52 is offline  
Sponsored Links
Advertisement
 
post #2 of 7 (permalink) Old 01-13-2010, 02:36 AM
PSN Veteran
 
moore20017.3's Avatar
 
Join Date: May 2008
Location: Chesapeake, OH
Posts: 2,897
Re: ZF6 Trans.

Most of the pullers in my area are running standards...dodges, chebbys and the few Fords. The last pull I went to there were only two autos out of ten trucks, most of which were Dodge and Chevy.

Mine has been over 500 for almost a year, and tows heavily.

2008 F-250 SCLB Larait.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
moore20017.3 is offline  
post #3 of 7 (permalink) Old 01-13-2010, 02:27 PM
PSN Local
 
12v Ford's Avatar
 
Join Date: Nov 2008
Location: Aztec, NM
Posts: 74
Re: ZF6 Trans.

They are tough trannys.

Mine has about 508-542 hp running through it, depending on the dyno. I've put 38k through it with that and it already had 110k on it from before. Some of the dmax guys have quite abit of hp going through theirs, and they are still alive.

My brother has a 99 with a zf6/cummins. He runs about 450 hp. He swapped the powerstroke out at 190k. Now he has 300k and the tranny is still great. He also tows alot and he has a single disk sb ofe.

Mine- 1995 Ford F-350 XLT CC 2wd DRW LB, ZF-6sp, '96 215 hp Cummins, SBDD, #10, SDX 5x14s, HE351cw/S475/1.10 twins, and other good stuff

My Newest-1995 Ford F-350 XLT CC 4x4 SRW LB, 460 gas, auto, Soon to be 12v Cummins, 4r100 and 700hp+

Wife- 2008 Ford F-350 Lariat CC SB 4x4 SRW, 20" factory wheels, navigation, sirius, all stock for now
12v Ford is offline  
 
post #4 of 7 (permalink) Old 01-13-2010, 03:57 PM
HRT Performance
 
HotRodTractor's Avatar
 
Join Date: Jul 2007
Location: Mingo, OH
Posts: 4,565
Re: ZF6 Trans.

The ZF6 is actually a pretty tough tranny. They have been known to hold pretty well in the pulling side of things with just a few exceptions once you really start putting the power to them. They don't like to shift fast and if you add in a dual disk clutch it takes longer to allow the synchros to mesh. If you just jam it into gear you trash the synchros and it makes it harder to shift. Some of the input shafts have been known to wear on the splines over time with some of the aftermarket clutches depending on what clutch disks are being used in the clutch. The first thing that actually breaks is the output shaft if you've got the power to do it. Usually this happens in sled pulling when we have the power to go to 4 high and can grip the track well. I've broken some, Bean has broken some, Jon Jon (a dmax in Indiana) has broken some, and Evan Davis ( a dmax here in Ohio) has broken some. There are likely others, but these are the ones I know about off the top of my head.

These trannys can take a whole lot more than 500Hp and be just fine.

2006 Dmax MPI compounds
2015 VW Jetta TDI
2006 VW Jetta TDI


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
HotRodTractor is offline  
post #5 of 7 (permalink) Old 01-13-2010, 04:57 PM
Cowboy Up
 
Join Date: Apr 2009
Location: Somerville, TN
Posts: 283
Re: ZF6 Trans.

At what point (hp) do you think they start breaking.

'96 F350 CCLB, Dually, 4wd, ZF6, 4.10's, 4" lift, Energy suspension and body bushings, Firestone airbags, 245/70R19.5, 3" DP, 4" MBRP straight pipe, Afe stage 2, TW 6 pos, Autometer gauges, Valair kevlar/ceramic clutch, Stage 1's, Shimmed FPR, Gutted EBPV, Welded pedestal, CCV mod, SD 7.3 intercooler, D66 Turbo, 17* HPOP
INTPSTROKE96 is offline  
post #6 of 7 (permalink) Old 01-13-2010, 05:21 PM
HRT Performance
 
HotRodTractor's Avatar
 
Join Date: Jul 2007
Location: Mingo, OH
Posts: 4,565
Re: ZF6 Trans.

Quote:
Originally Posted by INTPSTROKE96 View Post
At what point (hp) do you think they start breaking.
Bean was probably north of 750 when he started having trouble with his (maybe Ryan can confirm that since that is a WAG on my part). Jon Jon didn't start having trouble till he was north of that figure. Evan's truck is a NASTY 2.6 truck that I can honestly say is every bit of that figure. I can't say that mine was that powerful, because I also had a bounce at the same time, any figure I could throw out on my truck I can't back up so I'm not going to, but it was north of 500 HP for sure.

The synchros being shot have nothing to do with HP levels - that is a function of the driver and clutch setup.

2006 Dmax MPI compounds
2015 VW Jetta TDI
2006 VW Jetta TDI


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
HotRodTractor is offline  
post #7 of 7 (permalink) Old 01-13-2010, 11:11 PM
PSN Veteran
 
PSDnate's Avatar
 
Join Date: Dec 2007
Location: Ephrata, PA
Posts: 545
Re: ZF6 Trans.

I replaced mine in my 04 at about 70k. My synchros started going out. I went with midwest trans. I had them cyro some of the weaker parts(like synchros). They say it makes them 30% stronger I believe.

2004 f350 6.0L psd 4x4 6spd cc sb dark shadow gray, sct tuned by eric, 6" ICON 20x12 centerline, 35x13.5 mickey t atz
PSDnate is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the PowerStrokeNation : Ford Powerstroke Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome