T19 to ZF5 1986 F250

[the86s]

I have been reading up on doing a zf5 swap in my 1986 F250 6.9 IDI 2wd. Has the T19 and I can feel the clutch is getting a little tired so i figured if I have the trans out I may as well do a swap and get overdrive since I do a lot of highway miles. I was also able to find a good deal on a 2wd 1988 F350 with the 7.3 IDI that has a zf5 behind it for a donor truck from a buddy of mine. Hard to pass up a mostly together parts truck for around the same price as a good zf5, also gets me closer to having everything I need, a lot of transmissions I was seeing didn't have everything included.
Now on to the swap, I am planning to get a new clutch kit regardless and know that the donor probably has a DMF that could cause me some issues. I have no problem with some of the rollover noise that is discussed with the SMF conversion. Would I be able to use the SMF from my truck and get a clutch kit that would work with the zf5? If not what are my best options for a conversion kit to stick with a SMF? I know LUK kits are pretty commonly used but others may work just as good if anyone has other experiences. I can't say I'm sold on the LUK price tag just yet, especially since most don't trust LUK bearings. Trying to stay within a tight budget if possible but I want it to work well for me too. Any other info you guys have on doing this swap would be appreciated. Really appreciate this forum, it's helped me diagnose/fix a lot since I got the truck.

 

[miked]

Hello
I did this swap also, over 20 years ago.
I got my trany out of an 87 f350 c&c parts truck I bought. It came with a 6.9 - zf5 drive train, still have that motor sitting under a bench
I remember it as a stright forward job. although I can't remember if I was able to keep the 4 speed master and slave or if I swaped in the zf master and slave.
I have the truck in my barn and can check this out if that info would be helpful

cheers

 

[the86s]

That would actually be super helpful, the donor truck I have access to is also a c&c truck so whatever you did would likely be the same thing I need to do. Both trucks have clutch slave and master that look to be in good shape so I'm sure I could get something to work. Do you remember how you did the clutch setup for that swap? Were you able to keep the SMF from the T19? If I knew I could trust the clutch and flywheel from the donor truck this would be super easy, but for my sanity I'd like to go with a new clutch kit at a minimum and stay away from the DMF if possible.

 

[miked]

I put the clutch and flywheel from the 87 into it.
I will take a look tomorrow about the master and slave

 

[Old Goat]

I have not done this swap, but here is another thread with same
title as yours.

4 speed to ZF5 swap

1986 6.9 idi 2wd F350 dually. This swap should be as straightforward as they get, but I still need help before I dive in. I currently have the factory manual 4 speed and it does run flawlessly. But I do need that overdrive to help with rpm's at highway speeds. I am installing a zf5. I do have a...

www.oilburners.net

At the bottom of each Thread is 4 or 5 related threads.
This link is actually at the bottom of this Thread.

Iam using a LUK Clutch, but in my 86 with the T-19 Trans.
No complaints about it, it`s a 12" Clutch.
Iam using the Throw Out bearing from O`Really`s, all metal one.
So far so good. Been in 1 1/2 yrs so far.

I had the Clutch fail quite a few years ago, I was 25 miles from home, and had a shop replace it.
Couple years later I had this squeek, squeek, squeek sound, took a while and figured it was the TO bearing. replaced it with an O`Really one, (all metal) and couple yrs later it did the same thing. The Bearing was all floppy and loose.
Replaced with another O`R one and ran a long time till I put in the current one.

They are a sealed bearing, maybe they all come down the same China assembly line and don`t put in enough grease.
Too bad there isn`t a way to squirt in a bit more grease.

Happy wrenching on your ZF-5.


Goat

 

[IDI-IKE]

I haven't done it but read multiple times the 87 6.9 could come with a zf5 and they used a smf still same as the t19 flywheel. So if you buy a 87 6.9 zf5 clutch it should work. I put a LUK in my bullnose with the zf5 and I love it has a easy pedal and engages smoothly. The hydraulics will swap no problem the t19 slave pops right onto the zf5. I'm not sure on driveshafts but on a 4x4 t19 to zf5 they swap right over. If I had to guess the LUK smf is just aftermarket copy of the 87 6.9 zf5 flywheel and clutch excluding the idi-t engines.

 

[miked]

Sorry never got out to my shed today. We have been getting snow squalls from off of lake huron all day and it just felt too nice sitting by my wood stove and watching the snow whip by to want to go outside. but it looks like the previous posters already gave you the info you needed from me.
Oh and I was able to use my original drive shafts.

 

[IDIBRONCO]

it just felt too nice sitting by my wood stove and watching the snow whip by to want to go outside.

I can perfectly understand that feeling.

Oh and I was able to use my original drive shafts.

I did too when I did the swap.

 

[franklin2]

You cannot use the T19 flywheel with the zf. The distance is different, I think the zf bell is deeper. That is why they make the zf 5 speed SMF conversion flywheels. The SMF T19 flywheels will not work with the zf.

 

[the86s]

Thanks for the help guys, looks like I will be getting a conversion kit. Not necessarily a bad thing since I am sure the flywheels in both trucks are not in the best shape anyway. Thinking about trying the Perfection clutch (part no: MU19891SK)
from rockauto given the price is very competitive. Have any of you tried that one or heard of it before? Trying to stay on a budget for now and throw some quality stuff at it further down the road.

 

[u2slow]

I believe Perfection is a rockauto house brand.

Mine was a clone of the OEM Sachs 13" (89-93 dodge diesel) part # MU871. It has worked every bit as good as the one I took out.

 

[MechRick]

Watch Rockauto flywheels. I've gotten two in a row that the balance was off. One of them was a 460/ZF5. Both were LUK flywheels, but I just avoid flywheels from them now.

Also, the 6.9 and 7.3 have slightly different balance specs. There are many who use the 7.3 flywheel on the 6.9, but I would cart the 6.9 and 7.3 flywheels to the machinist to have the 7.3 flywheel balanced to the 6.9's specs (which eliminates the possible balance issue from Rockauto).

 

[u2slow]

Watch Rockauto flywheels. I've gotten two in a row that the balance was off. One of them was a 460/ZF5. Both were LUK flywheels, but I just avoid flywheels from them now.

Also, the 6.9 and 7.3 have slightly different balance specs.

Sounds like a LuK problem, not the vendor.

If the balance is different like you say, beware that the MU19891SK says it fits 87-94 inclusive. The 7.3 wasn't available in '87.

 

[miked]

Hi old goat
I had trouble finding a new throw out bearing for my current project through the local parts stores.
It was suggested to try a heavy truck repair center and this is what they found for me.

An SKF bearing with a much larger bearing. It fits the forks and the transmission. the distance from the back face to bearing face is within .010. I think I am good to go

I only post this as there have been many complaints about only finding chinese knockoffs and this may be an better option.

 

[Old Goat]

Thank You for posting this.
I was doing a Google search on the part #, and this
E-Bay listing is the cheapest I found.
$30.00 and free shipping.

Pardon Our Interruption...

Prices seem to range between, $40.97 - $99.99
Saw a Timken on E-Bay $45.00, says used but is new,
box is a bit scrunched. Made in U.S.A.
Here is a cross reference on related part numbers.
Not all are made in the U.S.A.

Part Interchanges​

• Green Ball CB1697C
• LuK N1753
• Sachs SN1753SA
• SKF N4062
• Timken 614062
• BorgWarner N1753SA
• Sealed Power C6224S
• Autospecialty CB-81013
• Chicago Rawhide N4062
• A-1 Clutch B49840
• APRA BA1063
• Ford E7TA-7548AA
• Ford E7TZ-7548A
• Ford E9TZ-7548A
• Ford F0TZ-7548A
• Ford F1TA-7548AA
• Ford F1TZ-7548A
• PERFECTION ST1753SA
• PERFECTION ST2000
• Pioneer N4062SC

Goat