t-19 to zf conversion question

[Shadetreemechanic]

I am in the process of putting a zf in an 85 f-350 cab and chassis. My donor is an 88 f-superduty. The superduty has the driveshaft emergency brake and a larger u-joint. Both trucks had the same wheelbase so I was hoping to take the superduty driveshaft and put it in the f-350, but the ujoints are much larger on the superduty driveshaft than my current axle pinion.
can I get a custom ujoint to join my superduty driveshaft to my dana 70 rear, or do I need to go to a driveling shop and have the yoke changed out on the driveshaft to match my pinon?
I don't really think I will use the driveshaft ebrake. How difficult is it to remove it and replace it with a standard tailshaft assembly off another zf? Then I might be able to use my old driveshaft. There is a pull a part nearby that has a couple of zfs.
Thanks

 

[flareside_thun]

Napa is usually pretty good about keeping ******* joints in stock. As for removing the driveline brake, the only difference between the Zf in your truck and the Zf in mine is yours has the brake where mine has a BW1356 xcase. I don't think you'll be able to find a tailshaft to put in place of the brake. Since your trans is essentially a 4wd trans.

 

[Shadetreemechanic]

******* u joint. Cool I was hoping something like that existed.
thanks

 

[bike-maker]

Do a lot of towing? I use the low range in my transfer case all the time just for moving my trailer around. Would be nice to have, even on a 2wd. And transfer cases are pretty cheap.

 

[flareside_thun]

I agree, it's a lot easier to fandangle trailers into tight or tricky spots with a xcase in low range.

 

[Shadetreemechanic]

I love using low range for trailer maneuvers, but this particular truck won't have a hitch. It is getting a 12 foot refrigerator box and will deliver for a wholesale farmers market.
I am 1/2 inch from having the transmission in. The truck has headers and the tubes are keeping the alignment pin on the passenger side from lining up. Tomorrow when things are open I am going to try to shorten the pin with a sawsall to get things to slide into place. I have never had a truck with headers that didn't leak, and these don't so I don't want to loosen them.

 

[84TD]

Is the f superduty zf any different from a regular f series one? stronger? different gear ratios etc?

 

[Shadetreemechanic]

I don't think so. The only difference I know of is the driveshaft e brake. The gear difference that caused me to scrap the superduty is the rear axle. It has 5.13 gears and the lowest available for that axle is 4.63. Becuase the superduty is 10 lug my axle choices are very limited. I am pulling all the stuff I want off the superduty (zf, hydroboost) and putting it on the f-350 that has 4.10 gears. If it revs higher than I want I also have a 3.73 axle to put under it.

 

[flareside_thun]

There is no difference between the two other than what I posted in post #2 of this thread.

 

[Silver Burner]

Do a lot of towing? I use the low range in my transfer case all the time just for moving my trailer around. Would be nice to have, even on a 2wd. And transfer cases are pretty cheap.

That's exactly what I did on my 86 2WD. Ran a 4X4 ZF5 with a 1356 T-case. It made it SO much easier to back the trailer up if there was even a little grade.

 

[84TD]

So what year did the ZF change to the later style with the deeper gears?

 

[rjjp]

So what year did the ZF change to the later style with the deeper gears?

The close ratio changed at the same time as the change from the ZF S5-42 to the ZF S5-47, I believe it's powerstroke engines only (for the 5.08 first). But 94 IDIs may have it, I'm not 100% sure.

 

[Shadetreemechanic]

The close ratio changed at the same time as the change from the ZF S5-42 to the ZF S5-47, I believe it's powerstroke engines only (for the 5.08 first). But 94 IDIs may have it, I'm not 100% sure.

94 IDI's definitely do not have the deep first gear of the s5-47, it was 95 or 96. if my 94 zf ever comes apart it will get one. My first is way too tall for towing with 3.55s.

 

[Agnem]

Don't cut the pin! Move the pipes instead.

 

[Shadetreemechanic]

Don't cut the pin! Move the pipes instead.

But the pipes don't leak. I've never had headers that didn't leak and I am afraid if I mess with them they will. I only need to cut half the length off the pin to give it room to slide.
I am going to bolt it up with longer trans to engine bolts first to see if wiggling it with tension on it will help it slide into place first.
If I loosen the headers won't i need to replace the gaskets?