Building an adapter to go from 1989 350 to TF727.

[larboc@hotmail.com]

Ok, I can get a complete TBI 350 for 200 from the salvage yard. Has anybody ever succesfully made an adapter in their shop to make this work? Advance adapters only has a kit to fit 86 and down and its $435. I am comfortable making a bellhousing adapter, or taking it to the cnc plasma man and having him do it. But what happens with the torque converter? The picture doesnt show up on their site so I dont know what is involved.

It may come down to just buying a conversion and making it fit the 89 engine, but I would like some imput from somebody who has made this conversion.

I got a free IH 727 4wd that is brand new rebuilt so I would like to keep this all in place with the d20. I plan on doing the lockup TC swap before it goes in.

From the searching I have done on BB and P4x4 I see that people have done it and are happy with the kit, but I'd like to do it myself.

Flame on.

[larboc@hotmail.com]

ok, just talked to AA and it appears that the 87+ wont work because it has the one pieace rear main seal. a friend of mine said that they had an adapter featured an adapter tha converts a 1 to 2 piece. been googling for it. Anybody know whats going on here?

[Binder]

I have this adapter. Sounds like your on the right track. I have a older engine so it works fine but from what I understand the problem for you would be the adapter piece that goes between the crank and the TC. Seems it's the end of the crank shaft that is different. I don't know how hard it would be to make it work.

[CrossedUp]

weird. I had the same convo with someone at AA today too. Trying to go cheap for now by adapting the 8.1 vortec to the 727. (same pattern as a SB chevy 350 86+)

[Bill usn-1]

I got a free IH 727 4wd that is brand new rebuilt so I would like to keep this all in place with the d20. I plan on doing the lockup TC swap before it goes in.

This might be a little more involved then you think!!

Just in case you didn't read any/everything...you will need to change the:
torque converter
The input shaft
the front pump
the valve body.

This will require a partial disassembly of your just rebuilt 727.
You will gain about a 2-300 rpm drop with it engaged on the highway.
It is strickly pressure driven therefore is not selectable.
You would need to change to a deep sump pan and install an electric solenoid in the fluid tube on the valve body to make it able to turn on and off.

The lock up converter was only used AFAIK in light duty applications so don't expect the converter to hold up for long going in and out of overdrive.

Now if you are building a mall cruiser then your fine but then I have to ask ...

Why are you asking on this board?

[larboc@hotmail.com]

More maul than mall.

no, this rig is strictly buisness. I had read back in the archives of BB that the swap was do able. What overdrive are you talking about? I am just going to grab a 727 from a junker and only put in the lockup T/C. I read someplace, can't remember where, that you can ID the lockup vs. non-lok 727's by the input shaft. If there is a smooth bearing like surface on the last .5 inch or so of the spline, it's a lockup.

I do rember seeing some stuff about OD 727's but it seemed that it wasn't possible to do to the scout version.

The adapter would be first in order, then work on the tranny. I may just leave it as is. I doubt the lockup would really help with milage that much.

[Mechanos]

What bill is saying is that you can't just slap a lock up TC on the 727 and call it good. The fluid passages that convey the pressurized fluid to the lockup clutch are in the input shaft so you have to swap in the corrent input shaft. Now the IH 727 pump doesn't have the ports to feed those new fluid passages, you have to change the pump assembly as well. Then control it all, you need to modify the VB.

[Bill usn-1]

Exactly Torc. Then if it is to live, you need to make it selectable with the addition of a solenoid and a switch on the dash to turn it on and off.(or go EFI and let the computer do it) It should be like a highway mode that is only turned on above a certain speed under light loads on the highway to conserve fuel.

[ih4ever]

WTF... everybody is confusing me... i have a 90 350tbi, will i be able to adapt it to my ih 727???

[reuben]

why not just run a 350 tranny, or a 700r4 to a 208 or something. save your money from trying to basterdize it and do it right.

[troutbum]

why not just run a 350 tranny, or a 700r4 to a 208 or something. save your money from trying to basterdize it and do it right.
I agree, you have a lot of options with the SBC TH400, th350, 700r4 with an overdrive... why would you fuck with the IH727

[ih4ever]

cause the truck i have doesnt have a tranny. its a 3/4 ton 2wd, and i already have a 727 sitting around the house

[troutbum]

:rolleyes: PnP

[reuben]

cause the truck i have doesnt have a tranny. its a 3/4 ton 2wd, and i already have a 727 sitting around the house

so you are going to spend more $ trying to put a 727 behind a chevy then you would just going and getting a tranny and t-case for pnp. hell, I am picking up my 400 and 203 combo for $100, I know there is not any adapter that cheap

[ih4ever]

alright... here it is i already have a klune v 32 spline female input, and a np 205... so that right there limits my search to a th400 which around here arnt the cheapest and easiest things to find at pnp. then im gonna need an adapter to go from the th400 to the klune which is a couple hundred from klune or aa... so either i pay for 1 adapter for the 350-727 (727 is already rebuilt in truck) setup or i pay for a new tranny, rebuild it, and buy an adapter

[larboc@hotmail.com]

what he said.

[larboc@hotmail.com]

ok, thumbing through my AA catalog, they have an adapter for converting an sbc of any year, including 400 sbc and vortec's to the tf 727 that went behind 258's and amc V8's. 500 bucks. I assume this is the same belhousing as chrystler's 360? anyway, tid bit for ya'll.

[CrossedUp]

I think the problem lies in the scout TC. IF I understood the AA rep.

[larboc@hotmail.com]

the scout was available with the 727 in both an amc and an IH belhousing. I know where there is a salvage yard scout with the 258 in it and auto tranny, but its not worth it to still have to spend 500 for the adapter.

[ih4ever]

I think the problem lies in the scout TC. IF I understood the AA rep.

why the hell would the problem be in the TC? for a sbc to mate to a tf727? the TC has nothing to do with the engine bolting into the tranny. maybe the aa rep mis understood you...

the amc 258 and a dodge 360 would have different bolt patterns b/c of different engines. the internals are the same in what ever 727 you have, i can put my scout 727 into a dodge/jeep 727 no problem same manufacture, but the pattern of the scout 304-727 is a completly different pattern then the one from the jeep/dodge, plus the starter is on the oppisite side of the tranny also.