t18 swap

hi does a t18 4spd have the same front bolt pattern as a t98 and will a d18 bolt to the back thanks

 

Unfortunately, it is not always that easy. This is always a hot topic here. Run a search and you will find out. Good luck. CJ

 

I purchased my jeep with the swap already done. Novak makes an adapter to mate the t-18 and the d18 t-case. The older model t-18 is supposed to be able to mount better to a chevy bell housing (buick V6) than the newer versions. My t-18 is from a Ford. Several companies used the t-18 including Ford, International, and Dodge. I didn't do the swap so I don't know that much. I hope that helps you some.

 

In a word, maybe, and no, not unless it already has a Dana 18 or 20 attached to it. Re the T-98, there's more to it than bolt pattern. What do you want to do? More specifics please.

 

hi , timgr i have a t98 in a 1968 cj5 with 134f & d18 problem is i need an input shaft and front bearing retainer and cant find parts ive called all over the country so my next thought was to swap a t18 in any thoughts thanks for the help

 

Pm Jason Hawkes (Hawkes62cj5) he knew where there were 6 input shafts for the 4 cylinder model, that were NOS.

 

So I take it you have the T-98 already bolted to your D18, and the plate adapter, but you are missing the input shaft and retainer? Take a look at this thread. http://www.earlycj5.com/forums/showthread.php?t=30480
With the help of a machinist, you may be able to make a retainer from another T-98 retainer, or keep looking... with perseverance and enough money, you'll find what you need.

We've discussed the T-18-to-F143 swap before, and there's no easy way to do it. I'd think the easiest path might be to get a Jeep truck T-18, with a really long input shaft, and machine the input shaft, an adapter, and bearing retainer to fit. Likely as expensive as the obvious alternatives that involve replacing one of the other key drivetrain components though...

 

yes i need the input shaft and retainer i have the bell adapter to t case already any help with parts will be appreciated thanks

 

I think that you could use the V-6 kit from advance adapters which includes pilot bearing, retainer, adapter plate, and main drive gear.

Couple that with a 9.5 inch clutch from a mid 80's Ford Ranger and a little machining of the flywheel, and I think that one could make it work.

Because the mdg is shorter for the t-18 than the stock f-134 t-98 mdg, you'd have to come up with a thinner adapter, or perhaps no adapter at all if you drilled and tapped holes into the trans case through the bell housing similar to the way International mounted their transmissions.

If you are interested in doing the math you can use the Advance Adapters catalog to get most of the information you'll need.

All you are trying to do is to replicate the stickout length of the t-18 MDG to the t-90 MDG.

T-18 main drive gear will work in a t-98 or t-18. The difference is the number and size of roller bearings, but that problem has already been researched and solved by AA.

As an alternative to ALL of that, I have a t-98/F-134 main drive gear sitting next to my computer on my desk. I'm looking at it right now.

If Sparky would be interested, I would be willing to take measurements from it and send them to him. He could then post 'em on the site.

The MDG I have next to the computer is NOT for sale.

I don't know of any shop that has made one from a larger t-98 MDG, but I suspect some racing or extreme custom machine shop would do it. Now, the price may be $$$$$$$$...

T-98 MDG for a 6 cyl 230 engine is readily available and be had for less than 100 bucks - it is larger and longer than the f-134 and if one of these things can be cut down, that would be a good one to start with.

kamel

 

Supposedly the MDG (main drive gear?) from a J-truck or Wagon with a 258 and a T-18 uses an approximately 1" thick spacer between the T-15 bell and the WR T-18. May be useful if it's longer than the F134 bell depth (I suspect it would be). You may as well use the whole T-18 rather than put the drive gear into the T98, I'd think.

 

Sticking with the entire T-18 would be a good idea if you can do it....it is usually easier to deal with the longer shaft than the shorter shaft. However the J series shaft is quite long and uses some very long adapters. The MDG is also 1 1/8 inch diameter, and I don't know of a 9.5 inch clutch that fits with the 1 1/8 inch diameter.

The t-18 (AA v-6 app) is 1 1/16 inch diameter, and the only clutch I know of is the Ford Ranger / Thunderbird from mid 80's.

Stock f-134 mdg diameter was 15/16 inches

If I recall correctly the f-134 bellhousing adapter is 7/8 inch thick. I may be wrong in my memory, but I know for sure it is less than one inch. I could measure one if anyone wants am exact number.

 

No, that's the V8 application you are thinking of that has about a 5" spacer and a very long shaft. The I6 uses a shorter shaft to accomodate the longer engine. I would think that all the Jeep T18s would have the same diameter shaft - I presume you are referring to the Ford shaft at 1.0625"?

 

The AA mdg that I think could possibly be used is from a late 70's jeep mdg that is 1.0625 inches in diameter. I have the Warner part number around here somewhere..

I thought that the prior post suggested a j series truck transmission and mdg. That would be way too long for a cj5 application.

I have a T-18 from a J series truck sitting in the shop and the mdg is very long.

 

There are two lengths for J-trucks: the V8 version is very long, but the one for the 232 or 258 inline 6 uses a smaller spacer and is about 4" shrorter.

 

thanks for the input im going to keep looking and maybe fabricate what i need for now ill drive the m38a1