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  #21  
Old 04-09-2010, 07:24 PM
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reece146 reece146 is offline
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Quote:
Originally Posted by getlost4x4
is it possible to use the adapter from a 71 th400 to bolt up a 4 speed auto from a chevy?

i just found a stock adapter and was hoping i could use the adapter to install a 4 speed auto.

IIRC the patterns are completely different. I think the spline counts may be off too (27 vs 32?).

I've completely dumped all Chev knowledge out of my brain pan since getting rid of the last of the Chev stuff I have. I may have the information muddled.
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  #22  
Old 04-09-2010, 09:47 PM
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Casey Casey is offline
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Quote:
Originally Posted by getlost4x4
is it possible to use the adapter from a 71 th400 to bolt up a 4 speed auto from a chevy?

i just found a stock adapter and was hoping i could use the adapter to install a 4 speed auto.
Engine to trans adapter should be the same bolt pattern.
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  #23  
Old 04-09-2010, 09:58 PM
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Hankrod Hankrod is offline
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What pattern did the AMC adaptor, adapt to? Chevy or BOP. The 700r4 is a chevy pattern. Hankrod
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  #24  
Old 04-09-2010, 10:29 PM
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getlost4x4 getlost4x4 is offline
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i thought the adapters were to mate the GM pattern tranny to the AMC block??

look at the bottom of the page. AMC engine compatibility.

http://www.novak-adapt.com/knowledge/th400.htm
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78' Jeep Wagoneer (Tank), Built 360, 330 Miles, QT
360 V8 (fresh rebuild), Summit Racing 8600 cam, GM TBI Conversion (in progress), 31" tires no lift, 2.5" exhaust system,dual batteries, T-Max 9000 lbs winch, many plans empty pockets
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  #25  
Old 04-10-2010, 06:31 AM
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Hankrod Hankrod is offline
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I was responding to the question - will a 71 adaptor for a th400 work with a 700r4? A: I dont know, does a 71 adaptor, adapt to a chevy or BOP trans?

now I will say that all chevy's (straight 6, v6, and all v8's) from mid 60's to about 2001 have the same trans bolt pattern. BOP are different. Hope this helps, Hankrod
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  #26  
Old 04-10-2010, 08:24 AM
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jaber jaber is offline
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Quote:
Originally Posted by getlost4x4
i thought the adapters were to mate the GM pattern tranny to the AMC block??


I have 2 of the factory adapters here.
1 is from a '71 J?. It is Buick Nailhead tranny to BOP engine. Worked great for the Caddy engine.
The second is a Nailhead tranny to an AMC engine.
I dont think there was a factory adapter to a GM tranny, just the Buick.

I think I got that right....
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  #27  
Old 04-10-2010, 08:33 AM
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getlost4x4 getlost4x4 is offline
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my friend has the 304 v8, not sure of the year. but it clearly has an adapter on the back of the engine.

i plan on snagging it from him and i'll check it to the front of a gm tranny.
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  #28  
Old 04-10-2010, 08:44 AM
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tgreese tgreese is offline
 
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Just a contrarian opinion ...

What do you expect to gain from the 700R4 swap? Is it because you want the automatic, or because you think it will give you better mileage?

If it's the first, I suggest that you look around for a J-truck that already has an automatic. There were a lot more of them built than with manual transmissions, and you should be able to find a replacement truck with an automatic for much less time and money than you'd spend on a swap.

The T-15 3-speed transmission in your truck is a good transmission - strong for a 3-speed, and fairly easy shifting. The Borg-Warner 3-speeds are easy to rebuild, too. From the factory, the clutch pedal force is not particularly truck-like ... but if you put a stiff performance clutch set in, pedal force will go up a lot.

Re mileage, I think you will be disappointed on any mileage gains. The main economy problem with these trucks is aerodynamics, not gearing IMO. You'll likely gain a few mpg, but it will take years to make back the money you spend on the automatic swap. A manual transmission is more efficient than an automatic, even an efficient overdrive automatic with a locking converter. It takes power to move all the stuff to shift the gears - no way around that - and gearing up with an overdrive takes energy too.

So, what do you really want to accomplish? If all you want is an interesting project that you can spend your money on, then go to it. But I don't see any way you can justify it for practical reasons.
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Last edited by tgreese : 04-10-2010 at 08:50 AM.
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  #29  
Old 04-10-2010, 09:47 AM
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Hankrod Hankrod is offline
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tgress is correct. I have a 700r4 in my wagoneer. It has 3.90 gears and 31" tires, so it works out real good. I like the low 1st gear. It was quite costly to convert and was not -in any way - worth any fuel savings. Also the adaptor kits cannot take 500+ hp from a turbocharged 401, the torque converter bolts with spacers will rip right through the flexplate. I know because it happened twice to me. Hankrod
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  #30  
Old 04-10-2010, 11:25 AM
Wagoneerlover Wagoneerlover is offline
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tgress and hankrod are both correct. I was able to save substantially by doing all of the work myself on both a trans swap and a TBI install. This helped me to gain extra mileage but the cost did not become exceptionally high. If you get a shop to do all or part of the work the cost start to outweigh the benefits of the potential gains from these upgrades/swaps. I know one guy who had his corvette outfitted with a new trans and engine. A shop did it and the cost start to near the 8,000 dollar mark. (Of course they did all the work, including wiring etc) The aw-4 swap was very inexpensive for me as I did all of the work and it required no adapters (This also depends on what trans case you use as you may need an adapter for that). The tbi install was also cheap because I went the DIY route. (Complete DIY no shop or outside source did any of the work.)

But think carefully about what you plan to do with your rig and how much of the work you can do and what the cost of supplies etc will run you or how much the shark (ummm I mean shop will charge you to do the task you cannot do yourself or the entire job if necessary). If the cost are too high then you will be wasting effort, time and money.
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  #31  
Old 04-10-2010, 12:51 PM
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getlost4x4 getlost4x4 is offline
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i'd just like a 4 speed auto over the 3 speed th400. i know the th400 is built proof.

i would just like to have an overdrive for the highway.

i have plans to add TBI to my rebuilt 360, i think the 700r4 and TBI would make the jeep perfect for me.
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  #32  
Old 04-10-2010, 01:20 PM
joe joe is offline
 
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Why not just replace the clutch?
On a side note if your truck is stock the tcase is a D20.
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  #33  
Old 04-10-2010, 06:04 PM
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Jacksons Hole Jacksons Hole is offline
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If you guys are asking me "why," I just asked the q to make sure I kept all my options open. If I didn't ask, I wouldn't have found out I could do the AW4 swap instead.


As I said, I'm just in research mode. I want to learn about this thing before I do anything to it. I will start digging into it eventually and learn what's wrong. I want a backup in case the 3-spd is shot or close to shot.

I'm going to ask other dumb questions in additional posts that I may or may not do, based on others opinions, and how I feel when the rebuild starts.

ie...do I try to add power steering, do I buy a BJ's disc brake conversion or just follow JP mag's instructions, do I add power brakes, can I fit 4 speakers, do I need an additional fuse panel, can I fit Waggy buckets inside, how do I mount the spare to the bed, what's the best sound deadening, are there leafs that swap in, how big tires can I fit, how do I retrofit XJ bushwacker fender flares

etc etc etc

Will I do everything above? No....but will I kick myself if I don't ask (or search)? Yes.

For now the 3-spd is staying and maybe it does just need a new clutch. I'll find out soon enough.

But I'll keep asking pre-emptive q's!
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  #34  
Old 05-02-2010, 08:21 AM
recycledj10
 
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If I can figure out how to post pictures on here, I will show everybody what the xj aw4 shifter looks inside my j10.

Also you can get the jeep np208 behind the aw4, just need to get ahold of a 1/4 inch spacer are even less then that and RTV the crap out of it on both sides.

And as Wagoneerlover stated the swap was very cheap. I already had the trans from an xj, my np208 out of my j10, and sourced afew parts from junkyards like the xj shifter, starter and little ods and ends. But I probaly put less then 200 bucks in the swap.

The most expensive thing out my swap was getting the 4.0 flexplate balanced to AMC 360 specs. And my aw4 is shifted manualy right now with a rotary switch( in process of rebuilding the 360) and when I am done I will take the time to put the computer in.
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  #35  
Old 05-02-2010, 08:50 AM
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reece146 reece146 is offline
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I would love to see the shifter in the J10.
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  #36  
Old 05-02-2010, 08:57 AM
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Songman Songman is offline
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Quote:
Originally Posted by getlost4x4
i'd just like a 4 speed auto over the 3 speed th400. i know the th400 is built proof.

i would just like to have an overdrive for the highway.

i have plans to add TBI to my rebuilt 360, i think the 700r4 and TBI would make the jeep perfect for me.

That's my thought too. It has to be a lot nicer to drive on the highway with the overdrive transmission.
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  #37  
Old 05-03-2010, 10:07 AM
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Jacksons Hole Jacksons Hole is offline
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Quote:
Originally Posted by reece146
I would love to see the shifter in the J10.

Ditto.
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1971 J2000 Gladiator - "Bertha"
AMC 360 - 2bbl Motorcraft Carb - T-15A 3spd - D20 T-Case - 11" Clutch - D44 front and rear - 4.09 axle ratio
** Status - Scrapped **
1990 Grand Wagoneer
** New - Just learning about her **
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  #38  
Old 05-03-2010, 02:19 PM
recycledj10
 
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How do you post pictures on the website?
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  #39  
Old 05-03-2010, 02:23 PM
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Jacksons Hole Jacksons Hole is offline
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Quote:
Originally Posted by recycledj10
How do you post pictures on the website?

Host them somewhere (I use webshots) and then copy the link to post the particular pic in a forum. Click the yellow mountain with sun icon when responding to a post (2 to the right of the hyperlink) and paste the link in.
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1971 J2000 Gladiator - "Bertha"
AMC 360 - 2bbl Motorcraft Carb - T-15A 3spd - D20 T-Case - 11" Clutch - D44 front and rear - 4.09 axle ratio
** Status - Scrapped **
1990 Grand Wagoneer
** New - Just learning about her **

Last edited by Jacksons Hole : 05-03-2010 at 02:28 PM.
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  #40  
Old 05-16-2010, 09:05 AM
recycledj10
 
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http://s996.photobucket.com/albums/a...t=100_0581.jpg

I think this works, this is a picture of my cherokee shifter inside my j10.
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