I know that when you do a cummins conversion, they sell different adapter plates for the gas zf5 and the diesel zf5, so they have to be different.
The s5-42 tranny has different ratios than ths s5-47. The s5-47 was mostly used in the DI powerstroke and required a synthetic fluid. It was also rated for a little more torque
Got one of each here at the shop. Bellhousings are different for sure.
Not sure on gear ratios, but I havew swapped out the zf in a 95 powerstroke OBS rollback, and one from a 96 reg cab f-250 powerstroke.
The f-250 had the lower first gear. Both were factory trannies.
So, it may not be a gas vs diesel thing, might be just different build dates, or possibly just optional gearing, or maybe even different for trucks with different rear gears as the 350 rollback has 5.13 I think, and the 250 had 4.10
It is very easy to swap the case as long as you turn the right side up before slidng it apart! hahah
DONT ASK! :doh:
So, it may not be a gas vs diesel thing, might be just different build date
It is very easy to swap the case as long as you turn the right side up before slidng it apart! hahah
DONT ASK! :doh:[/quote]
:whs:The gearing is the same, but the build dates are what is different. They kept changing things inside the tranny's over the years, synchros, shafts, bearings, ect. When you order specific parts for these trannys like mentioned above they are serial# specific because of all the subtle changes made from one year to the next. The bell housings will not match up either, but yes you can take the guts from one tranny and put them into another. the cases are the same
I personally prefer the S5-42 transmission over the 47, I've had 2 trucks with 47's and 3 trucks with 42's. The 42's are much better shifting if they are in good condition. Although my '97 has a 47 with a dual disc infront of it and I've managed a 14.3 in the 1/4mi.
I believe the biggest difference is the year made and is it coming off a small block or big block.The small block zf5spd wont work with the diesels the housing is different (dowel pins etc)the 460 and diesels should interchange depending on the year made. I believe they changed things up after 94 so 87 to 94 . This info is from different things I have read for I am looking at the same thing.The gearing is preference they have them where they are close or wide apart.
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Related Threads
?
?
?
?
?
Ford Power Stroke Nation
2.5M posts
107.5K members
Since 2007
A forum community dedicated to Ford Power Stroke owners and enthusiasts. Come join the discussion about diesel performance, modifications, EGR deletes, troubleshooting, lift kits, tires, wheels, maintenance, and more!