Ok, I've been asking a lot of transmission related questions, and, no surprise, I have another one (or several). So, I have a 51 F-1 with the 4-spd, non-syncrho crashbox transmission. My 48-52 shop manual also shows that the F-4 and above came with, or had as an option, a 4 speed syncro-silent transmission. Of course, the transmissions being what they are, there's really no parts numbers or matching BW, or Warner numbers in the shop manual. So after further reaserch, I find some internet articles detailing the fact the BW (or maybe just W) made the T-98, which was used in variations on Ford trucks from 1948-1955 (T-98) and from 1955-1972 (T-98A). the T-98 is a heavy duty 4-speed with the same gear ratios as my 4-speed non-syncrho transmission (which I believe is a T9).

So, question #1, is the T-98 the 4-speed syncro-silent transmission used in F-4 and above models?

So, question #2, would a T-98 fit, with little modification, fit where my T-9 currently sits?

I know the transmission cross-member is in different palces on the F-2+ trucks than it was on my F-1, but all those models use the T-9... so, to me, logically, it seems that if the T-9 can be used easily enough with both coss-member palcements, than the T-98 (if that is the correct transmission) can be used easily enough with both cross-member placements?

The reason for all these questions is that I am having problems with my transmission. I still haven't perfectly diagnosed it yet (I've got another post on that somewheres), but I've been talking with the folks at Van Pelt's, and whatever is wrong is likely not going to be remedied without taking the transmission out and going through it. At that point, it might be nice to rebuild the whole thing, and if I am going to go through the trouble of doing that I might as well just stick a syncrhoed tranny in there for driving pleasure (and I happened to come across a guy selling a fully rebuilt T-98 at a fair price). Hence the above questions. Thank you guys again for your help.

 

[/IMG]Too question #2, the T-98, T-18 and T-19 are very similar in size as a matter of fact the T-18 guts can be stuffed into the T-98 case. You will need an adapter. For the T-98 I'm not sure of but the T-18 & 19 there are adapters. Here is a picture of the a stock crasher tranny and T-19.

 

Here's the crasher.[/IMG]

 

HD74. Thanks for the info and pictures... it looks like you had to cut out your crossmember to fit the T-19 in... is that right or am I seeing it wrong?

 

Your right, going to fabricate a new section of the crossmember next week. I'm hoping to incorperate the section I cut out. I will be posting pictures.

 

Out in my favorite local salvage yard is a severly rotten carcass of a '53. I'm not sure exactly what size truck it is, but it's an F-450 - F650 sized truck and it has a 2-speed axle. ANYWAYS, the point is that it has a partially disassembled flathead V-8 in it and still has the transmission. I've got to get back out there this spring and see what tranny it is. It's more than likely the elusive synchro-mesh 4-speed that everybody seems to be looking for for their Bonus Builts. Anybody know if that tranny carried forward to '53 in those big trucks? If it is, I need to liberate the thing from it's rusty grave. There seems to be too much demand for them to let it sit there until the truck gets crushed.

 

Here are a few facts I've found........

before '53, syncromesh 4 speeds were only available behind the 254 big six, in f5 and up.
Not sure if those are t98s or not........
T98s have no tranny mount....Y blocks used mounts on the bellhousing
Flathead V8s never had t98s behind them except for 53 when Ford changed trannys.

So you could put a t98 behind a flathead V8 or six IF you find the right bellhousing....but they are pretty scarce. And you would still have to change the cross member and fab new clutch linkage........t/m

 

Borg Warner T-98 4 Speed Manual Transmission

1948/51: F4/F6 226 I-6 & 239 V8.

1950/52: F6 254 I-6

1952: F4/F5 215 I-6 / F4/F6 239 V8.

1953 F100/700 all.

1954/64: F100/700 239/256/272/292.
------------------------------------
1948/52 F1/F3's used the Borg Warner T-9 4 Speed Manual Transmission.

 

I put a T-98 right behind my 239 flathead. bolted right up. had to shorten the driveshaft, bt thats it.
Reamer

 

Getting ready to rebuild the T98 in my 52 F6
Its got a flathead V8 with the T 98 its original as far as I know, as ND states they did come behind the 239's as well as the big six 254

The 53 up T98 trans I think are slightly longer than a 51 52 T98 ? And as Tinman states have a one year only bellhousing in 53 for the flathead with the mounts built in.

Ive actually got two T98's just in case I need any extra parts during rebuild.

Any tips or things to be looking for aside from the normal wear tear while taking it apart?

Thanks

 

The bell side of the T98 from a flathead, should locate the same whether a V8 or I6. The depth of the mount for the T98 to crossmember is good for F4-6. Some fab work, you could make it fit the F1-3 (cut and weld). Since yours is going into an F6, it should be a bolt in affair. The tranny-to-bell bolts on the flathead version are on the outside, where I think the '53 version would be on the inside of the bell. Different casting anyway, due to mounts.

AFAIK, a T98 is that, a T98. So anything internal should be interchangeable with another.

 

The input shaft length on all the '53-on trannies is an inch longer than Bonus Builts'. If the BB input shaft drops into a later case, and the front and rear bearing retainer/mount from a BB fits onto the later case with correct shaft protrusions, everything will work. That's a lot of "if's" tho...

 

I'm in the process of this right now -drive shafts are getting rebuilt,

Anyone know what type of bolts are for the T98? Looks like the mount up from bottom of the mount? Also seems the T98 mount is threade

 

48-52 T98 has rear flange mount for crossmember - avail as option only or stock behind big six -F4 up (as ND posted)

53-55 has ears in front of case and no rear mount

56 later has reversed cut gear teeth and is completely different

 

Anyone know what the bolt thread size on the T98 mount bracket?