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I FINALLY was able to find a transmission shop near me that will touch a manual transmission, and surprisingly the guy used to be a ford tech in the early 2000s and was trained to work on ZF6's. He quoted me $600 for labor on a bench rebuild. He asked me to source the parts to save money. I am having a hard time finding out the difference between the high torque and low torque main shafts. There's ones that say NOT for 7.3 Diesel, and then one that says NOT for 7.3 Diesel High torque, and one that is for the high torque. I don't know if its just metallurgy differences between it or if the shaft is visibly different. I don't know if my trans the the high torque or not and according to the previous owner, he put a new transmission in it so I can't even check based off of VIN or anything. If its purely just a composition difference I'll get the high torque one but I would hate to order one and have it not fit right. Anybody know anything about this? Hopefully when I get home I can be able to read the tag and get some info but being a rusty michigan truck I don't know if the tag will even be there.
High torque stuff was 6.0+ Zf6 stuff. So unless it's been rebuilt with 6.0 internals previously it will not be high torque parts.
There's the high torque one for the 6.0 zf6 which is the s6-750 with the 34 spline count. But there's a non high torque 7.3 and high torque 7.3 for the zf s6-650 with the 24 spline count.
There's the high torque one for the 6.0 zf6 which is the s6-750 with the 34 spline count. But there's a non high torque 7.3 and high torque 7.3 for the zf s6-650 with the 24 spline count.
I got in contact with Scott Schleck at at midwest transmission center and there IS a dimensional difference. "The main shafts are different, the high torque m/s has longer 1/2 synchronizer spline and uses a different 1st gear and 1/2 hub."
He said they are NOT interchangable without replacing 1/2 hub and 1st gear.
from my research, the high torque transmissions were for the 01+ trucks (not 100% sure though). My problem still remains however, as the previous owner said they replaced the transmission because the syncros were bad. I don't know if he replaced it with a used one from 99/00 or 01/02 or if he got it rebuilt and misspoke saying replaced so I will need to find the 1319 tag number to confirm what internals there are. Luckily I have been able to find either shaft for about $250.
This is the photo he sent me showing the differences. You can see that the second set of splines from the top are different lengths. The one on the left is the high torque.
There is a good chance that I will probably be ordering one of each as my identification tag is unreadable.
I got in contact with Scott Schleck at at midwest transmission center and there IS a dimensional difference. "The main shafts are different, the high torque m/s has longer 1/2 synchronizer spline and uses a different 1st gear and 1/2 hub."
He said they are NOT interchangable without replacing 1/2 hub and 1st gear.
from my research, the high torque transmissions were for the 01+ trucks (not 100% sure though). My problem still remains however, as the previous owner said they replaced the transmission because the syncros were bad. I don't know if he replaced it with a used one from 99/00 or 01/02 or if he got it rebuilt and misspoke saying replaced so I will need to find the 1319 tag number to confirm what internals there are. Luckily I have been able to find either shaft for about $250.
Scott confirmed that without an ID tag it is impossible to know which interals are in it as both the high torque and non high torque were produced from 99-early 03. For anyone else that needs the info, anything late 03 and newer were all high torque.
Looks like I will be ordering both and trying to return one of them.
Scott confirmed that without an ID tag it is impossible to know which interals are in it as both the high torque and non high torque were produced from 99-early 03. For anyone else that needs the info, anything late 03 and newer were all high torque.
Looks like I will be ordering both and trying to return one of them.
Why not just let him take it apart, then order the proper one? Shouldn't add more than a week to the repair time.
Why not just let him take it apart, then order the proper one? Shouldn't add more than a week to the repair time.
It has been super difficult trying to find a shop that didn't shoot me down immediately as soon as the word "manual" came out of my mouth. For $250 that can be returned (one is free shipping returns) I am taking 0 chance of ticking this guy off and giving him a reason to not do the work for me. With my luck he would say that he doesn't want it to sit on a bench all torn apart for that long.
If I was doing the rebuild or there was multiple places I have quotes from I would do that but its just worth the peace of mind for me.
I’m in the process of removing the transmission and I can’t get the slave cylinder out. I know that I need to push it in and rotate counter clockwise but I’m either a weak child of a man or you gotta be Thor to push it in. Or mine is stuck for some reason. Any tips for removing this? This trans really doesn’t wanna come out. Gotta love rusty bolts and all sorts of other corrosion
