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I bought a used zf5-42 for my 1984 f-150

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Meadman
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I bought a used zf5-42 for my 1984 f-150

Post #1 by Meadman » Wed Jan 09, 2019 8:14 am

Hi I have just joined the forum. I picked up a used zf5-42 for my 1984 f-150 with a tod transmission I’m not in a big hurry to put it in. What other issues will I run into making this swap? Will I need a new drive shaft or shorten the old one? How does the hydraulics hook up to it. I think I have the zf with electronic speedo not the one that attaches with a cable. My first time dealing with a transmission. So am taking it slow. Any other info on making this swap would be appreciated. :D

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Shorty
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Re: I bought a used zf5-42 for my 1984 f-150

Post #2 by Shorty » Wed Jan 09, 2019 11:17 am

the tod is a slip yoke i believe, and the zf is fixed. you will likely need to have a slip spline in the drive shaft. The hydraulic is internal in the zf, rather than external in the tod and I think the holes on the fire wall may need to be re-drilled to clock/index the master to sit vertically. You may also need to move your cross member and drill a few new holes. This is based on my recent switch from the tod to a m5od. with that switch i had a gear driven speedo so that was plug and play, the drive shaft was the same spline on the slip yoke and length, I had the cross member from the doner truck and needed to drill two new holes and I had to clock the master (that came off the doner truck) on the firewall.
85 F150 on 78 bronco frame C6 np205 welded dana44 front, trussed posi nine inch rear. EFI exhaust manifolds into one 2 1/2" rolls on 35x12.5x15 Maxxis Trepador.

Meadman
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Re: I bought a used zf5-42 for my 1984 f-150

Post #3 by Meadman » Wed Jan 09, 2019 2:22 pm

Your right about the slip yoke on the tod. I have the cross member from the donor truck as well.

guhfluh
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Re: I bought a used zf5-42 for my 1984 f-150

Post #4 by guhfluh » Wed Jan 09, 2019 6:35 pm

Though it seems most info is posted here and those are transmissions behind 300 6cyls, it *is* the wrong forum section for it. I'm not sure if there is much traffic in the truck section on this site, but there does seem to be a decent amount on FordTruckEnthusiast website, if you want to try posting there as well.
1967 F-250 Crew Cab 2wd, 300 6cyl, T-170/RTS/TOD 4-speed overdrive
240 head, Offy C, EFI exhaust manifolds, Comp 268H, mandrel 2.5-3" exhaust, Edelbrock 500, Pertronix ignitor and coil, recurved dizzy. 200whp/300wtq

sdiesel
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Re: I bought a used zf5-42 for my 1984 f-150

Post #5 by sdiesel » Wed Jan 09, 2019 11:35 pm

stay put we'll work with you. but next time move this over to the trans section.
the zf, a fine trans, will need some working to get it to fit.
just minor stuff but more than u might expect.
we assume urs is 4x2.
if so, carefully check the ears on the mounting pad at the back.
they crack and to repair them u will have to remove the trans again.
will the master cyl you currently have work?
be sure u can remove the fill plug b4 installing trans.
I used redline atf on mine.
they are heavy be careful
a long love affair with the 300 six.
my lastest and final fling is a fresh 300 in an 88 ford f350 dually 4X flatbed

Meadman
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Re: I bought a used zf5-42 for my 1984 f-150

Post #6 by Meadman » Wed Jan 09, 2019 11:49 pm

Yes the truck is a 4x2. In the future I will try and get subjects in the right forum. All the ears look good. I will check the filler plug first. Should I look for a cylinder that comes off a 95 which is the same as the transmission. Thanks sdiesel.

sdiesel
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Re: I bought a used zf5-42 for my 1984 f-150

Post #7 by sdiesel » Thu Jan 10, 2019 9:16 pm

as for master cylinder,
I would try what u have first, if ur line will interface with the bearing.
see if they are parts sold seperately.
if so ur parts may fit the zf bearing actuator
a long love affair with the 300 six.
my lastest and final fling is a fresh 300 in an 88 ford f350 dually 4X flatbed

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Shorty
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Re: I bought a used zf5-42 for my 1984 f-150

Post #8 by Shorty » Thu Jan 10, 2019 10:12 pm

the tod was external slave I believe, the lines are different from the internal slave/release bearing used on the m5od and zf. on my truck i used a master from an 89 and had to drill the two small mounting holes in a slightly different spot to get it to sit horizontal on the firewall. The attachment of the pushrod to the pedal was the same.
85 F150 on 78 bronco frame C6 np205 welded dana44 front, trussed posi nine inch rear. EFI exhaust manifolds into one 2 1/2" rolls on 35x12.5x15 Maxxis Trepador.

Meadman
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Re: I bought a used zf5-42 for my 1984 f-150

Post #9 by Meadman » Thu Jan 10, 2019 10:34 pm

Your right about the external slave on the tod. Thanks for the input

sdiesel
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Re: I bought a used zf5-42 for my 1984 f-150

Post #10 by sdiesel » Fri Jan 11, 2019 8:18 am

yes, lines are different between the two transmissions, where they might interface is at the slave cylinder.
if ur master has a role pin holding the line in the tip of the cylinder, test fit the zf line at that location.

REMEMBER,
to install firewall support bracket, when in there to avoid tearing your firewall.
a long love affair with the 300 six.
my lastest and final fling is a fresh 300 in an 88 ford f350 dually 4X flatbed

Meadman
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Re: I bought a used zf5-42 for my 1984 f-150

Post #11 by Meadman » Fri Jan 11, 2019 10:47 am

Thanks s diesel. Where do you buy the firewall support bracket?

BigBlue94
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Re: I bought a used zf5-42 for my 1984 f-150

Post #12 by BigBlue94 » Fri Jan 11, 2019 11:21 am

Are you going to rebuild the trans? If so, check put Torque King 4x4 or Allstate gear for all the little parts.

You'll need to convert into to a 87 style tailhousing and output shaft for your speedometer I believe (im not up to snuff on 4x2 stuff).

Your master cylinder should work, but the line is indeed different. Also, buy a new slave cylinder. You dont want to have to pull it 6 months down the road, since it's in the bell housing.

Fullsize bronco dot com has some good threads on these swaps and rebuilds as well.

I believe you can get the firewall support bracket at broncograveyard.com

Remember! The zf5 takes ATF, not gear oil.
1985 Bronco. 309ci I6, NP435, 4.56 gears, Detroit locker and tru-trac, 4" lift, and 37" swamper tires. The 309 is 9.75:1 CR with a Schneider 140H cam, 4bbl, roller rockers, larger valves, and headers.

Meadman
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Re: I bought a used zf5-42 for my 1984 f-150

Post #13 by Meadman » Fri Jan 11, 2019 2:02 pm

Great information thanks

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MechRick
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Re: I bought a used zf5-42 for my 1984 f-150

Post #14 by MechRick » Fri Jan 11, 2019 3:09 pm

It may be possible to convert the hydraulics to use AN3 line. There are adapters to mate the 'o' ring/pin factory setup, something like Russell 640281 or similar.

When I converted my Bronco and F150 to the ZF5, I had to use the tunnel cover off a later truck and a C6 trans mount to get it to fit under the sheet metal.
1994 F150, 4.9L/ZF 5 speed, C-Vic police driveshaft
EFI head w/mild port work, 3 angle valve job
1996 long block, stock pistons, ARP rod bolts
Stock cam, aluminum cam gear
Hedman header, full mandrel bent duals, crossover, super turbos
http://fordsix.com/forum/viewtopic.php?f=2&t=73244
Bronco II with a 2.3L swap http://fordsix.com/forum/viewtopic.php?f=13&t=72863
1988 F250 2x4, 460 ZF 5 speed.

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Re: I bought a used zf5-42 for my 1984 f-150

Post #15 by BigBlue94 » Fri Jan 11, 2019 4:44 pm

Ditto on the 87+ trans tunnel cover. Its taller than the 80-86. User AbandonedBronco points out that the zf boot mounts to the tunnel cover differently than the old 4spd trannys. Its specific to the zf5/m5od. The M5od shifter design however, makes removal on those more difficult than the zf5 equipped trucks.

I'm slowly swapping my 96 f350 over to zf5 now
1985 Bronco. 309ci I6, NP435, 4.56 gears, Detroit locker and tru-trac, 4" lift, and 37" swamper tires. The 309 is 9.75:1 CR with a Schneider 140H cam, 4bbl, roller rockers, larger valves, and headers.

Meadman
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Re: I bought a used zf5-42 for my 1984 f-150

Post #16 by Meadman » Fri Jan 11, 2019 7:46 pm

Thanks for all the good info. This is great stuff.

sdiesel
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Re: I bought a used zf5-42 for my 1984 f-150

Post #17 by sdiesel » Fri Jan 11, 2019 11:43 pm

firewall support
terripinmfg.com

his is boss.
also the wimpy lititle ford fix-it-b4-it -breaks bracket comes up often on eBay. usually 10.00.
ford had an elaborate bracket like terripin, but it's long obsolete. it was designed to repair after it broke.
the tear starts at the edge of the reinforcing panel on firewall.
you tube will explain better than I can.

I've never had fun with ford crossmembers.
they all "almost"fit.
drives me nutz.
anecdote:
a hillbilly neighbor, leaning on my fender as I un button my 88 to change from 460/auto to 300/zf said ( he offered no help either, by the way)
"us know, everything u do on a ford like ur doin' is gonna be a half inch off".
truer words were never uttered.
when all finished, carefully check ur u-joint angles.
a different crossmembers with a different trans, may put ur output at a different angle.
a long love affair with the 300 six.
my lastest and final fling is a fresh 300 in an 88 ford f350 dually 4X flatbed

Meadman
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Re: I bought a used zf5-42 for my 1984 f-150

Post #18 by Meadman » Sat Jan 12, 2019 6:25 am

Many thanks s diesel. Y’all are wealth of knowledge.

BigBlue94
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Re: I bought a used zf5-42 for my 1984 f-150

Post #19 by BigBlue94 » Sat Jan 12, 2019 10:50 am

The zf5 crossmember is not straight. When looking from above, it has a U shape. Usually there are holes in the frame for most transmissions available then. Since this is crossing generations, you may need to drill your own. I know AbandonedBronco had the lower holes already in his 85 bronco, can't remember about the upper holes.
1985 Bronco. 309ci I6, NP435, 4.56 gears, Detroit locker and tru-trac, 4" lift, and 37" swamper tires. The 309 is 9.75:1 CR with a Schneider 140H cam, 4bbl, roller rockers, larger valves, and headers.

Meadman
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Re: I bought a used zf5-42 for my 1984 f-150

Post #20 by Meadman » Sat Jan 12, 2019 11:48 am

I have the cross member from the 95 along with the zf that came out of the f-250. Thanks I figured there would probably have to be some new holes drilled.

F-250 Restorer
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Re: I bought a used zf5-42 for my 1984 f-150

Post #21 by F-250 Restorer » Sat Jan 12, 2019 12:30 pm

I have a thread going on Ford Truck Enthusiasts forum, in the 73-79 section, about putting in a zf5, and all the small stuff that is needed. The thread is: C6 to zf5, and all the small stuff. Or, search posts by F250 Restorer. You might find it useful.

The first thing you need to do is determine whether that zf is good to drive, or if it needs work. There is a long section in my thread about how to do that.

All zf s542's with the small block bellhousing configuration, like the one you have to fit a 300 I6, were INTERNAL slave cylinder. It is quite common for the synchro rings to go out after a while (many miles). One simple test for your trans: Try taking hold of your pilot shaft, and see if you can move it vertically. If you can, you have wear in two sets of bearings that cause that. I would, at the extreme very least, replace the front and rear seal.

Good luck.

Meadman
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Re: I bought a used zf5-42 for my 1984 f-150

Post #22 by Meadman » Sat Jan 12, 2019 12:59 pm

Yes I was planning on letting a transmission shop look at it. Good thing to know about the pilot shaft.

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