bull gear specs

Hi, I just discovered this forum, so I am new here. I didn't find what I needed by doing a search. I have a 1 ton truck T98 tranny (has the 6something to 1 low gear) that I am trying to mate to a Dana 20 transfer case. I already have the input shaft/bell housing problems solved. The transfer case adapter plate(texas style) will bolt up with the exception of a couple of holes that I need to drill and tap(no big deal). The only question that I have left to solve is the bull gear. All of the T18 and T19 bull gears that I have are 6 spline 1&3/8 in diam and the output shaft on the T98 is a 10 spline 1 3/8 diam. I have heard that the output shaft on a T14 3 spd is a 10 spline. Is this so and if so what is the diameter? Some of the Kaiser Jeeps used a T98 I understand. Did these have 6 or 10 spline output shafts? I would like to use this tranny because; I already have it, It only has 10 thousand miles on it before the truck was totaled in a mishap with a train and it has the granny low gear. This will go into a 73 CJ5. Will prolly install a Tera low kit at the same time. Thanks, Cam

 

what Lynn said
looked this up last night
as far as I can tell, the Jeep T98 gear is 6 spline

 

I have a T-14 bull gear for a Dana 20 t-case sitting on my bench. Will meassure it tonight and post its specs. If it will fit then you are welcome to it.

 

I've already tried this once....nadda! The output shaft on the t-98 fits only 2wd yokes. You will need to get the correct output shaft like Lynn mentioned. The adapter should fit like you said, but seems I remember drilling and tapping all six holes.

 

Re:ED, bull gear specs

Ed, do you mean that the Jeep T14 ten spline bull gear is not 1 3/8 diam? The stickout length is fine also. On this conversion I will be using a "Texas" pattern T-case adapter so I will only have to drill 3 holes, The 2 top (3/8 I think) holes and 1 smaller 5/16 hole. The rest line up fine. Unless I am really screwing up some where, as that has been known to happen in the past. How hard are T98 mainshafts to come by if I need to go that route? Thanks everyone for the help so far. :stout: :stout: Cam

 

Couldn't you also swap in a T18 mainshaft? You'd have to swap in the T18 gears that go on the mainshaft as the bearings are different, but that shouldn't be a big deal.

Kevo

 

Im sorry, got busy with work last night when I got home and this slipped my mind. Will try to remember when I get home today.

 

Again sorry for the long delay in getting back. Had an out of town trip and forgot to meassure before I left. It is 1 3/16 inches on the t-14 bull gear.

 

If it is at all helpful, I have a NOS gear that was for a FC-170 jeep. It was (or would have been if it had ever been installed) for a dana 20 transfer case. It is a six spline.

I don't need it.

Please send me an e-mail or PM if interested.

 

Hi, Thankyou very much for all the help and info. It looks like the only way to do the swap is to find a different mainshaft to use the 6 spline gear. Anyone have any favorite sources for T98 parts? I guess if I also was going to go the tera low. I would most likely need the 6 spline as I very much doubt that they would be interested in broaching a bull gear to a 10 spline. Thanks again everyone, Cam:stout: :stout: :stout: :stout:

 

There was one for sale on ebay the other day. It may be closed by now, but I don't think it sold.

I think that most of the older parts vendors have this part. None of them have the input shaft or bearing retainers, but this part seems to be fairly common.

I have a Hollander transmission manual and the part is unique to jeep.

T-98-2A is the part number.