T15 for 66CJ

Will a T15 fit 66 CJ5 with Dauntless V6 with D18 Transfer case. What adaptors and changes would be needed?

 

I put a T14 in back of the V6 and only needed to change the input shaft and bearing retainer.

 

It should bolt to the transfer case if you have the right output gear. You'll need an adapter on the transmission side. http://www.novak-adapt.com/catalog/adapters/engine_to_transmission/kit_1415.htm

The case pattern is the same as the T-14, but the stickout for the AMC bell is different, so you need to make that up somehow.

 

Duplicate

 

I can't offer any advice on the T15...I CAN offer you a little advice I seen posted in your 4 speed thread... SLOW DOWN ...

DISCLAIMER... At BEST I'd be considered a SEMI competent shade tree mechanic...
Have you checked to see if your axles are geared the same...I know it sounds lame, but all anybody knows about your jeep is that it's a 66 V6 with a D18 that the guy said was "correct for the year" ...Do you have the drive shafts? Original bellhousing (unmodified)??? Since the transmission was gone & the transfer case loose, there's no telling exactly what you have as the PO...or maybe two or three PO's might have had "intentions" of going different directions...& even the work they (or any shops) did should be highly suspect until you take everything apart & do (at a minimum) a visual inspection. I was in a similar situation earlier this year when I bought mine except mine was running with the drive train intact & I actually needed it to get to & from work. It ran great but had a few electrical issues that I figured would be easy to sort out (which they were, but that's a thread all in itself) but about a month or two after I bought it, I blew first gear...after taking off the shift hat & looking at the guts, it was obvious that my tranny was toast... first gear was chewed up real bad & how it was even working escapes me...the "ear" that is cast into the T86/90 case for the idler was broken & the "shop" that had "rebuilt" the T86 had used some sort of epoxy to try to repair it...I still have the receipt the PO gave me for the repair...$2,008.00 give or take a penny or two...my wheel hubs? I'm not even gonna go there....
In a futile effort to get it back on the road, I figured "Herm" was the best route... ...when I finally was able to find a case suitable for a rebuild, I sent it to him along with a postal money order (because he doesn't take plastic) Two weeks later I emailed him asking WTF was up...because I hadn't had any updates...he replied that he'd just gotten everything & would have it shipped by the following Monday...
When I finally got the transmission, it was locked up...after a call to him, he had me hammering & prying on the synchros to free it up...

Once that was done, I discovered that the pilot bushing wouldn't fit... Again I called Herm & he tried to tell me that the pilot bushing for the T90 & T86 are the same...they are NOT... I'll give him credit for sending me one that would work priority mail, but all told, I'd have to give Herm a two thumbs down... (I still think I probably have a needle bearing problem)

EVERYTHING on my jeep (I have a prioritized list) that I have taken apart or looked at has been boogered or screwed up in one way or another...As much as I know you want to get the new jeep rolling, (I can't stress enough) TAKE YOUR TIME There is nothing worse than throwing good money after bad. If I were you & didn't need the jeep for transportation, I'd probably go R&P all the way...T18 & brakes. So far, all of R&P's stuff has worked for me...

IIRC, in one of your first posts, you mentioned that you wanted to teach your grandson mechanics...I don't know how old he is, but it's never too young to start...teach him right...do it once & do it right...NEVER substitute quality for quantity...It'll stick... Are you planning on passing it down to him? If so, & if he's old enough, involve him in the research/decision making process & don't work on it unless he's there so you can show him how the parts work/interact...if it's eventually gonna be his, you might as well build it to suit HIM You've got a lot to consider before you go rushing to stick a transmission in...like what you're gonna use it for....if strictly off road, you might want different ratios on the axles than you would if it's gonna be a dual purpose (highway/off road) type rig....same with tires. If you have a good idea of what you want for the finished product, Novak has a pretty good calculator... http://www.novak-adapt.com/knowledge/gearing.htm

Another good hint is to buy good tools...your grandson will not only know how to use them, but will appreciate them too...

 

Yes with some modifications.
Primarily you want to start with the correct Jeep T15.
The T15 must have the shorter of the two available Jeep maindrive gears (input shafts)
The flywheel bushing will need to be changed to accept the T15 maindrive gear pilot.

Installation requires that you attain a special bellhousing adapter.
The correct Jeep T15 to GM bellhousing adapter is 1-5/8" thick.
I recommend the Trans Dapt.
I forget the Trans Dapt part number but can look for that if need be.

Both T86AA and T15 bolt directly onto a D18 or D20 and no difference is noted.
The T15 is 10" OAL vs 8" OAL for the T86AA.
T86 AA requires 2-5/8" bellhousing adapter vs 1-5/8 " adapter.
That directly implies you must either move the engine foreward by 1" or else you must move the transfer case rear ward by 1".

That decision will effect the exact position of the shift tower under the tower cover plate.

 

Just to elaborate a little on what Ken wrote -

You, the OP (original poster), apparently have nothing right now but a body and chassis.

The T-15 would be a good transmission to use if your funds are limited. They are strong (significantly stronger than the T-90 you ask about in your other post), and will take V8 power. Most of them out there will have the short input shaft that Ken mentions. The long input shaft examples were only used in V8 Wagoneers and J-trucks. Everything else, including CJs and Commandos, and six-cylinder wagons and trucks, will be short shaft.

You will still need to buy a transfer case. Does your chassis have axles?

 

T-90 in-put shaft at pilot bushing is .629
T-86 in-put shaft at pilot bushing is .590