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post #1 of (permalink) Old 02-13-2001, 12:27 PM
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Jeep TF727 Lock-Up or Non-Lock-Up? HELP!

I am about to commit to picking up a TF727 from a bone yard. (I have found several from 80-83 Wagoneers.) My question is are these lock-up or non lock-up from the factory. I have a long time Mopar guy telling me that he has never seen a lock-up 727 but he also admits he deals with 60's and 70's models mostly.
I am trying to find the best boneyard pick for getting the 727, most say 80's waggy. If it is indeed lockup I am not sure what todo. I really want non-lock up. Is there a better donor for the 727 swap into a CJ? Thanks, for any help.


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post #2 of (permalink) Old 02-13-2001, 03:27 PM
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Re: Jeep TF727 Lock-Up or Non-Lock-Up? HELP!

Now I know someone out there is a 727 guru....Come AWN!


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post #3 of (permalink) Old 02-13-2001, 05:40 PM
 
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Re: Jeep TF727 Lock-Up or Non-Lock-Up? HELP!

the lock ups were available in some of the wags.cherokees J trucks, BUT not all.

it was usually deleted with the optional towing package.
the ONLY way to know for sure is to check the end of the input shaft.

if it has a smooth "nub" about 3/4 inch long then its a lockup, it will also have a hole in teh center of hte shaft that goes all the way thru the shaft.

the non lockup, has splines all the way to the end, and has a hole too, but the hole only goes an inch or so.

You can swap one to teh other, but it requires the input shaft, the reactionshaft/pump assembly, and valve body.

oh yeah, of course the converter is different too.




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post #4 of (permalink) Old 02-13-2001, 07:15 PM
 
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Re: Jeep TF727 Lock-Up or Non-Lock-Up? HELP!

What does a "lock-up" do for the tranny? What's it for?
I've never heard of this.
Fill me in...

'86 CJ-7, 360, T-176, Dana 44 rear w/Truetrac, Dana 30 w/Powertrax No-Slip, 4" Superlift, 4:11s, Warn HS9500i
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post #5 of (permalink) Old 02-13-2001, 07:21 PM
 
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Re: Jeep TF727 Lock-Up or Non-Lock-Up? HELP!

search for that subject the last week or so, its been covered pretty well.

basically it eliminates the slip in high gear at Highway speeds ( all autos without Lockup converters slip some) and makes it slightly more effecient.



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post #6 of (permalink) Old 02-13-2001, 07:50 PM
 
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Re: Jeep TF727 Lock-Up or Non-Lock-Up? HELP!

I'll do the search, but why would you NOT want one if it's more efficent?
Now I'm curious...

'86 CJ-7, 360, T-176, Dana 44 rear w/Truetrac, Dana 30 w/Powertrax No-Slip, 4" Superlift, 4:11s, Warn HS9500i
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post #7 of (permalink) Old 02-13-2001, 08:03 PM
 
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Re: Jeep TF727 Lock-Up or Non-Lock-Up? HELP!

some folks will say they arent as durable as non lockups. I think they are plenty strong myself.

its a clutch inside the torque converter, when it wears out it doesnt lock up any more, so its like a normal tranny then.
at least thats been my experience with them.

Ive never seen a failure blamed soley on the converter aspect.



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post #8 of (permalink) Old 02-13-2001, 08:08 PM
 
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Re: Jeep TF727 Lock-Up or Non-Lock-Up? HELP!

Thanks, Ozark! I just looked at mine. The splines go all the way to the end. (non-lockup?)

'86 CJ-7, 360, T-176, Dana 44 rear w/Truetrac, Dana 30 w/Powertrax No-Slip, 4" Superlift, 4:11s, Warn HS9500i
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post #9 of (permalink) Old 02-13-2001, 09:30 PM
 
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Re: Jeep TF727 Lock-Up or Non-Lock-Up? HELP!

yep, assuming your looking a the input shaft, and its all splined, its a non lockup.



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