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Hi , I need a little help on my T98 swap. putting a T98 in a 50 F5 flat head 6 that came with a 4 speed crash box. the problem is i have the T98 but it didn't come with the bell housing, half bell or rear trans / frame mount. can i use my old bell housing. I know the old half bell and rear mount wont fit, Anyone have the half bell and mount for sale or know where I can locate them. Thanks for any help
The front half of the half bell will be the same. The rear half is unique to the 48-52 T98. Are you sure you have the correct transmission? The rear bearing retainer is also the rear trans mount of the F6 T98 (7085), so if you have the correct 48-52 T98 it should be there, or you have a parted out trans. A 53+ T98 would have a different bearing retainer without a mount foot. I don't know if the bearing retainers are interchangeable between the 48-52 and the 53+ T98's. The parts catalog shows a different part number for the main case, but the output shaft and the bearing retainer gasket is the same at least through '55, which is as far as my catalog serves.
The insulator is the same for all F2-6 trucks no matter which trans was used.
The '53 and later case is different. The halfbell for the '48-'52 transmission bolts to the case inside the halfbell whereas the '53 and later cases bolt directly to a full bellhousing externally thru ears along each side the front of the case The halfbell is different on the T98 than the T9. The hole that fits around the front bearing retainer is larger on the T98 halfbell. I have an extra T98 halfbell that I would sell, but I don't have a spare rear bearing retainer/foot.
Mark
I have this available. Pretty sure it is for the T-98. There is also the driveshaft flange and a bag of misc. bolts. For the driveshaft flange: U-joint cap diameter holes are 1 1/8" for a 4" wide U-joint. Mount hole is 2.5" by 2 7/8"
The carrier mount has no apparent cracks or damage but is used of course. Can take more measurements of each, if needed.
Tom
Tom, that's the crashbox bearing retainer. It's easily identified by the foot facing rearward from the trans. The T98 gearbox is longer, so the foot faces forward. You can see the difference in the parts book drawings I posted. The T98 exploded view shows a good look at the foot of the retainer with the bolt holes ahead of the retainer. The mount view below it shows the orientation of the foot, with bolt holes behind the mounting face, as is all the other trans designs. The T98 retainer may also be marked with the part number prefix, 8MTH. Markings on a crashbox part may be 01T if for a F4-6, or 01Y or 8 D if for a F2-3.
Oh, thanks Wayne - I see the difference now. You are right - what I have here is not for the T-98. Well, that mount is still free if anyone could use it. Tom
my T98 has these numbers on the side T98-1R W.G. DIV N-2 not sure what it all means but the trans has the mounting ears on the outside of the trans , 4 of them so I'm not sure what year trans I have
my T98 has these numbers on the side T98-1R W.G. DIV N-2 not sure what it all means but the trans has the mounting ears on the outside of the trans , 4 of them so I'm not sure what year trans I have
The mounting ears on the outside are on the '53 and newer T98. That transmission will not work for your truck, even with the half bell that I have and the rear bearing retainer/mount. The input shaft is longer and in some models is smaller in diameter than the '48-'52 T98. In '56 the helix direction on the internal gears was reversed, so you couldn't even use any of the internal parts as spares if you found the correct transmission. Besides Ford, Jeep and other makers used the T98 also up until the mid 60s when it was modified and the designation changed to T18.
Mark
The mounting ears on the outside are on the '53 and newer T98. That transmission will not work for your truck, even with the half bell that I have and the rear bearing retainer/mount. The input shaft is longer and in some models is smaller in diameter than the '48-'52 T98. In '56 the helix direction on the internal gears was reversed, so you couldn't even use any of the internal parts as spares if you found the correct transmission. Besides Ford, Jeep and other makers used the T98 also up until the mid 60s when it was modified and the designation changed to T18.
Mark
Mark, do you know how much longer the input shaft is on the later version of the T98? I'm just thinking out loud here but if one could build an adapter plate the thickness of the difference to mate the 53+ T98 to the 48-52 bell, that could be a game changer for us early truckers who would like a synchro'd transmission. Obviously, it wouldn't be just that simple, there would be some other fab work and fitment considerations necessary to complete the install, but it could be a step in the right direction.
Wayne, I am trying to remember where I had that info. My computer died about two months ago and I lost everything. It may have been on the old computer. IIRC, there were several different input shafts from '53 up into the 60s when the T18 replaced it. There were a couple of different lengths, all longer than in the '48-'52 transmission, and one or two had smaller splines for the clutch. I will keep trying to figure out where I had that info and post it when I find it.
Mark
