Ive got a 258 6cyl, and Im wanting to get rid of my Ax15, I want to run an auto that will bolt up with no adapter to my 258, I can either choose from a TF999, or a TF727, I want to run a Dana 300 behind either tranny, do I need a clocking ring or any other parts to do this swap? Im kinda lost on what to do I need some help here, Ive got a clocking ring for a Ax15 to a Dana 300, will this ring work from a auto to a Dana 300? or are the rings different do I even need the ring?:confused:

A 999 is half as beefy as a 727. Why go to all the trouble and swap in something weak? Just get a 727 out of a 80's waggy/FS and go.

There are driveshaft clearance issues with a 727 you need to be aware of. The pan is big and may interfere with the shaft.

Re: Swapping in a 727 - With a lift you should not have any problems but with out one your front drive shaft will hit the pan.

You will also need a lokar kick down cable for the 727

For a most people, a 999 will hold up just find and it's a direct bolt on.

Sounds like you have big tires so you should probably get the 727 - it is one of the finest automatics ever made.

Do a search on off-road.com and jeeptech. There is a page on there somewhere about doing this...

-Stumbaugh

Originally posted by landuseorc
There are driveshaft clearance issues with a 727 you need to be aware of. The pan is big and may interfere with the shaft.

It's a easy fix (http://www.gryphinracing.com/CV.html)

yes the pan is a prob if you are still SUA...God i hope not. if you are cool (SOA) than you will have no problems with the DS. well if you ran a RC front like it did it might smak it at full stuff but build some bump stops and you will be fine.

O and go with the 727 easy swap. REAL beefy tranny, got a bud witha 525HP 440 in front of his TF727 and hasnot had a single prob w/ it.

make sure you get a REAL BIG tranny cooler and the lokar kick down cable as said B4. the stock linkage is a PITA.


Chris G.

I have a 94 YJ 4.0/999/300 with full width 60/70 and 40" TSL's. I have the deep pan and extra cooling assistance. I have the Go2Guy clocking ring.

Sure the 727 is a better trans but the 999 has done GREAT. I say get the 999 because it will bolt right in.

Originally posted by Old Scout


It's a easy fix (http://www.gryphinracing.com/CV.html)

Those pictures aren't of the area which causes most clearance problems. They are of the tranny pan corner near the transfer case. The area where most people have problems is directly ahead of that corner where there's a big bumpout at the front of the pan. Most people don't use a CV on the front, so there's rarely clearance problems on that back corner. The front bumpout is easily cleared as long as you have 4" of suspension lift. It doesn't have to be spring over either. Also with wider axles if the pinion centerline is out far enough more clearance is created between the driveshaft and that bumpout.

When I was running just a 4 inch lift, I had to "clearance" the pan a little with a hammer on that bump. I always kept a little grease on that spot. At FULL stuff, my DS would rub there just enough to keep that spot shiny on the ds, but not enough to cause any problems. Now with SOA, I don have any clearance problems. I have had this for about 4 years or so

I see posts about using the 999 because its bolt in. Isn't the 727 bolt in as well

arndog

Originally posted by arndog
I see posts about using the 999 because its bolt in. Isn't the 727 bolt in as well

arndog

No you will have the imposable task if making a cross member!:( :p :p

On my CJ7, I was able to use the stock crossmember