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4L60E or 700R4 behind a 69 390??? |
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SCRAGTOP 
AMC Nut 
Joined: Jul/03/2007 Location: Chesapeake, VA Status: Offline Points: 367 |
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 Topic: 4L60E or 700R4 behind a 69 390???Posted: Aug/21/2016 at 5:30pm |
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Would like to install a 4L60E or TH700R4 behind a 1969 or 1970 390 Engine. I know that Advance and Novak make adapters for 1972 and up AMC V-8s. What can be adapted for the PRE-72 engines? I remember reading in my "Performance American Style" about machining the back of the crank and using an adapter to mate the post 72 transmissions to the 71 and back motors. So, is machining the back of the 69 390 crank the only option or does somebody make a "bolt in" adapter (I know...its never bolt in). If someone makes the kit, where do I get one? Thanx, Jon
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1970390amx
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Joined: Jul/11/2008 Location: colorado Status: Offline Points: 3314 |
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Posted: Aug/21/2016 at 5:38pm |
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The kit includes a spacer that fits in the back of the crank shaft. A spacer is needed because the adapter is 1/2 inch thick. I think 1/2 maybe slightly thicker. So it should be fairly easy to make a spacer to fit the pilot in the back of the crank and fits the GM torque converter pilot.
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1970 390 4speed Bittersweet shadow mask AMX
1970 Amx missing most everything, or in a box |
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304-dude
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Joined: Sep/29/2008 Location: Central Illinoi Status: Offline Points: 9082 |
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Posted: Aug/21/2016 at 5:40pm |
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There once was a thread on a 727 mated to a 71 engine. They machined the snout of the converter to fit inside the existing pilot bushing on the crank. So, I would think the Novak crank spacer could be machined to fit properly to the crank without machining crank flange or converter snout.
I would choose the 700R4 over the big and heavy 4L60E. |
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71 Javelin SST body
390 69 crank, 70 block & heads NASCAR SB2 rods & pistons 78 Jeep TH400 w/ 2.76 Low 50/50 Ford-AMC Suspension 79 F150 rear & 8.8 axles Ford Racing 3.25 gears & 9" /w Detroit locker |
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uncljohn
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Joined: Jan/03/2013 Location: Peoria AZ Status: Offline Points: 5394 |
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Posted: Aug/21/2016 at 8:15pm |
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It would make sense to me that if there is an adapter to make a 71 and earlier AMC V8 fit a 72 MOPAR based automatic transmission once that adapter is installed, the adapter to use a 700 R4 would work by bolting it to the now converted engine.
Where is the flaw in that logic? And my preference leans towards the 700R4 |
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70 390 5spd Donohue
74 Hornet In restoration 76 Hornet, 5.7L Mercury Marine Power 80 Fuel Injected I6 Spirit 74 232 I-6, 4bbl, 270HL Isky Cam |
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Brad
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Joined: Aug/07/2016 Location: Canada Status: Offline Points: 433 |
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Posted: Aug/21/2016 at 8:44pm |
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I have a 4L60 behind a 451 stroker Big block in my 70 Challenger. Works really well. I'm using this to control the shifts https://www.powertraincontrolsolutions.com/Performance_Aftermarket/Products/Control_Modules/Simple_Shift_Transmission_Controller/TCM-5310/
I can control how hard it shifts under both hard and light pedal and at what rpms it shifts and when the lock up occurs. Much better than a 700R in my opinion. That and the bell housing unbolts on a 4L60 not a solid casting like on a 700R . A 4L60 is basically an electronic controlled 700R with a removable bellhousing. I'd check with quicktime to see if they could make you an adapter bellhousing. I looked but didn't see one listed? They make them for Mopars so they could just as easily make one for a AMC
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1970390amx
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Joined: Jul/11/2008 Location: colorado Status: Offline Points: 3314 |
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Posted: Aug/21/2016 at 9:16pm |
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Not that anybody cares but 700r4 and 4l60 are two names for the same transmission. In 1993 the changed the valve body and controls and started calling it the 4l60e. The e designation meaning its computer controlled. The early 4l60e had an integral bell housing just like the 700r4 until about 1996
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1970 390 4speed Bittersweet shadow mask AMX
1970 Amx missing most everything, or in a box |
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purple72Gremlin
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Posted: Aug/21/2016 at 9:28pm |
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SC/3.00
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Joined: Aug/13/2016 Location: Texas Status: Offline Points: 62 |
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Posted: Aug/21/2016 at 9:31pm |
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The 4L60E is the smaller transmission GM used in the S10's/Blazers and 1500 series trucks/vans/suburban/tahoes/etc. (As well as the GMC variants) IIRC, the 4L60E is smaller than the 700r. The 4L80E is the heavy duty trans that was used in the 2500/3500 vechicles and actually shares a number of parts with the 700r. In fact the 4L80E bands are often/usually labeled as 700r parts in the rebuild kit.
I believe the 4L60E is available in a non-computerized model (4L60) that was available on TBI vehicles, but don't quote me on that without verifying. On edit: I appear to have had the 700r and the TH400 conflated. The TH400 is actually the transmission that shares parts with the 4L80E. (I have the old bands from my 4L80E on a shelf) Edited by SC/3.00 - Aug/21/2016 at 9:44pm |
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6768rogues
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Posted: Aug/21/2016 at 10:01pm |
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I have read that the 4L60E transmission can handle up to 360 ft.lb. of torque. Of course, it could be beefed up if necessary. The transmissions have a fairly low first gear, so it should be a terror off the line.
Edited by 6768rogues - Aug/22/2016 at 1:15pm |
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SCRAGTOP
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Joined: Jul/03/2007 Location: Chesapeake, VA Status: Offline Points: 367 |
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Posted: Aug/22/2016 at 9:01am |
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Guys,
While the pros and cons of the two trannies listed are debatable, the question is still... How do you adapt them to pre 72 engines? Can we shift focus back to that question please? Just trying to get this thread back on track... Thanx, Jon |
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1970390amx wrote: