Hi guys, I am finally putting my new clutch in and have some transmission questions. After pulling mine out I discovered it has a s5-42 transmission in it, which doesn't make any sense to me. I thought all powerstrokes had the s5-47 tranny in it. So I walked over to a spare tranny and transfer case I got off of a 96 truck and that tranny was a 47, with a larger transfer case. Anybody know why my transfer case in my 95 would be different than the one out of the 96. Also, my gear ratio's on the side of the 42 say 4.14-.77 while the 47 says 5.08-.76. So I am assuming the 47 tranny has a lower first gear?

 

"96 and '97 were the only two years that came with the S5-47 and 4407 t-case. All the '95 and back had the S5-42 and 1356 t-case. The 47 does have lower 1rst, 2nd, and third gears. 4th and OD are the same. Reverse is a little lower in the 47 too.

 

Ahh,

Why is the 4407 so much bigger? Must be a heavier duty transfer case?

Well I decided to put the 47 in it cause mine has been hard shifting in second and third gears for a couple years now. I took a peak in the 47 and saw it had a little surface rust on a few gears but I think i am going to just see what happens. I will change the fluid after 50 miles or so and see what comes out.

 

The S5-47 and 4407 t-case combo are rated for a little more torque. If the '96 trans and t-case came out of an F350, the front yoke on the t-case will not work on the F250 front drive shaft. It has to be from an F250. If it was from an F350 and you need that yoke, PM me and I will trade you a F250 yoke for the F350 yoke.

 

Thanks, but I am not swapping the transfer case. Ill just reuse mine. The newer one has a totally different rear yoke set up on it. I don't want to mess around with changing drive shafts and u joints.

 

Yeah, I forgot about the companion flange on the rear. Do you know if the 4407 was from a F350 or F250. If it was from a F350 I'll trade you yokes anyway. I need one for a 4407 from a 350.

 

I have no idea what it was from. I got a motor, tranny and transfer case from somebody several years ago. I just know the motor had a 96 date on it. I recently got rid of that. I hope I don't regret that. Although i did rob quite a few parts off of it, including a LuK solid flywheel.

Im impressed with the ZF information on the ZF website, they have a full service manual I downloaded for free, and several other docs. Although I have read several different times now that the 42 is not interchangeable with the 47. So far they seem the same to me.

 

They are interchangeable. Parts are different, but the trans itself can be swapped in place of a 42. I've done it many times. Don't get rid of that yoke. I'm gonna check and see if there are any numbers on them to see which one you have. If it is from a 350, would you wanna trade it for a 250 one so if you ever decide to use that t-case?

 

Yeah I would do that. I don't have any plans to use the transfer case, but if it helps you out.

 

Cool. I'll PM you my phone #

 

Anybody know what fluid goes in the transfer case. Smelled like atf when it came out.

 

Yes atf .......

 

Mercon ATF in the trans and t-case.

 

Just a FYI, that Front F350 yoke is worth $150 and no longer available from Ford

 

SYNTHETIC ATF in the diesel trans