Just wondering what 5 speed manual transmissions are compatible for my 87 F250 6.9 4x4

I have the 4 speed manual and I want the overdrive. I dont like how hard she chooches going 70 down the highway. And I wouldnt mind the fuel economy benefit!

Thanks!

---AutoMerged DoublePost---

Also, what mods would have to be done to make this fit?

I found 2 older 7.3's at my local junkyard with 5- speeds. Will these mount up? Or will I need to make some mods?

 

I believe so, here's a post I found on another site on what he had to do:
It went pretty well, I did end up removing the starter and loosening off the exhaust on both manifolds to get the trans lined up. Redrilled for the trans crossmember, I used the ZF crossmember. Left the floor pan alone even tho I had the one from the ZF truck. It barely lifted and I had no need to modify the hole for the shifter. I used the T-19 stick/boot as I like it better and did use an extra sheet metal screw to hold it down snug where it lifted a bit. Used the slave that was on the truck....I hate compressing the rod with my hand and quickly trying to get it in place. So I used the hose clamp trick but that can be frustrating to. Driveshafts went back in no problem, the 1345 t-case bolted right up and I used the forward most mount on the ZF for the 1345 shifter. I left that hole in the floorpan alone also.
Only thing that I didn't get pack in was the darn flywheel dust cover/inspection plate. I will have to fight with it again tomorrow I guess.

So it sounds doable. Good luck.

 

You will need a ZF 5spd from any IDI or 1st gen OBS PSD. Do not get a transmission from a gas truck and don't get a 2wd ZF. While it's possible to make either one work, it requires A LOT of extra un-needed work.

 

Alright thank you. If I get a Zf off of an idi, will it require any mods?

And also would you trust a junkyard tranny?

They only want $200

 

I have driven both ... And I prefer the 4spd ... Everyone keeps saying the 5 gets better fuel eco .... I haven't seen it in the four I have driven ... Maybe with the right gear and tire choice it is entirely possible... Two of them were identical to my truck ... 88, 7.3, 3.55 35's ... Ext. Cab .... Mine was getting better mileage even spun up to a higher rpm and all

 

Junkyard units are risky, but they usually have a short warranty. My friend got a ZF from the yard for his 351 that was worse than the one he was replacing. He had a 30 day warranty though so he took it back.

If you have 3:55 gears, the 4spd is a great choice, but if you have 4:10's with a 4spd, the freeway is off limits. You will be running just shy of redline with stock tires.

 

Ill buy the 4 speed off of you

 

Im pretty sure my junk yard has a warranty. So thats good. And the 4 speed leaks fluid. Thats why I figured if I am pulling it off I might as well put the 5 speed in it. So yes I can sell you the 4 speed, but it leaks.

 

Thats fine man I have duct tape. haha but if you do wanna sell it just message me about it when you get around to it!

 

the PTO plates are real easy to get gaskets for .. and to seal the top loader is even easier ... ... these T-19's are damn near indestructible .. they use them in rock climbing for that reason ..