Amc 360 4l60e and np241c

[chappys4life]

On my stock 84 Wagoneer 360/727/np229 I’m starting to have transmission slipping issues and I believe the chain in the np229 is starting to be a issue (metal chain sound from the tc while accelerating) but the amc 360 runs strong. I’m not ready to do a motor swap, leaning to do not a LS but traditional 350.

What I’m thinking is swapping in a 4l60e & np241c as the motor runs strong. I see bjs sells an adapter that allows you to use a 4l60e or th350. I have found multiple 4l60e/np241c locally. What I’m wondering what’s involved with the swap? I understand I would need the trans adapter, floor shifter for trans but what about carb kick down, trans/tc mounts, and driveshafts?

[rocklaurence]

You'll need a Controller box for the Electronic Trans. Most controllers cost approx' $300-$400. You'll need to modify the trans cross-member mount and modify the drive shafts to compensate for the added length. My guess is a rebuilt trans will cost $3000, $400 for the controller, $300 for modified drive shafts, $400 for the adapter. However, this will provide you with a nice OD setup.

[tgreese]

I understood that the transmission controller is integral to the MPI computer on these trucks. If you don't use the engine, you might instead go with a non-electronic 4L60 or the earlier 700R4 rather than buy a stand-alone aftermarket controller. Novak has some information about these transmissions on their site: https://www.novak-adapt.com/knowledge/t ... automatic/ They also sell an adapter to the AMC engines, but I'm pretty sure they sell them direct purchase only. There's a good chance the adapter at the BJ's store comes from Advance Adapters, since they sell to retail sellers. Not to take anything away from BJ's, but if you do some more homework and determine the Advance Adapters product number, I'm sure you can shop around and find a better price. I've found Summit Racing to have the lowest retail prices on similar products, and I'm sure there are other sellers who will compete on price.

[dbx11]

The tf727 has adjustable bands you should check them they are pretty easy to adjust. Also the kickdown linkage has small bushings that wear out, replacements can be found but I used a completely new cable linkage from lokar If you haven’t checked those yet you should and might get away using the old stuff vs swapping in a new setup

[chappys4life]

The tf727 has adjustable bands you should check them they are pretty easy to adjust. Also the kickdown linkage has small bushings that wear out, replacements can be found but I used a completely new cable linkage from lokar If you haven’t checked those yet you should and might get away using the old stuff vs swapping in a new setup

I’m pretty sure the bands need adjusted, And the torque converter I think is also in its way out. It’s when the trans is cold it slips after driving around and warming up it gets ok. The problem for me is keep the 727 going, I cannot get it rebuilt easily and no OD. With the my transfer case needing work and again cannot get a rebuild easily (1200 for a rebuild locally) I am looking at options as money and dropping the transmission is needed. Also I hate all the vacuum lines. I thought I would change the seals and torque convert then swap my 229 for a 208. I cannot find a np208 in a 4 hour radius. If I go eBay it’s 500 used and now I need a rear driveshaft. I can get both a 4l60 and np241c used for 600-800 all day. If it’s a controller (300), adapter (500), and driveshafts modified (200-500) Why not go this route and set me up to use a abc 350 when my 360 dies (no one rebuilds them so crate motor for 2800) and have a better running Jeep?

[rocklaurence]

Would you install a used 4L60 without rebuilding it? I suppose you could roll the dice--it could run another 10 years or be bad on the installation..

[dbx11]

It’s worth it to keep it on the road to invest time to figure out if the parts you have are worth keeping. They work good in stock form and not hard to do. Slipping trans can be from the tv valve that the linkage operates. And if the bands are loose it won’t grab the drums. I have heard the tf727 is about as Easy to rebuild as the th400. I have done a th400 and it was easier to me than re-engineering/retrofitting an entirely new setup

[chappys4life]

Would you install a used 4L60 without rebuilding it? I suppose you could roll the dice--it could run another 10 years or be bad on the installation..

Yes I would. Mainly because it’s easy to get them rebuilt. Once I have the swap done to it’s easy to replace versus a hard to get fixed 727

[chappys4life]

It’s worth it to keep it on the road to invest time to figure out if the parts you have are worth keeping. They work good in stock form and not hard to do. Slipping trans can be from the tv valve that the linkage operates. And if the bands are loose it won’t grab the drums. I have heard the tf727 is about as Easy to rebuild as the th400. I have done a th400 and it was easier to me than re-engineering/retrofitting an entirely new setup

To you yes. To me it makes me want to burn down the Jeep. I have no intentions on rebuilding the transmission myself. I understand it is not that hard but to me my time is worth way more then messing with rebuilding it. I travel for work 70% so shop time to rebuild it is too much. I tried doing that on my old 53 f100 worst mistake and I got rid of it because I tried doing that. Tired of messing with harder to find parts.

[fulsizjeep]

I don't get it. Everything you have described wrong with the Jeep is speculation. I would just get the tranny and transfer case serviced and go from there. All this talk about changing stuff over. For what? That is the path to your Jeep sitting on cinder blocks. For months or eternity.