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Author
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Topic: 390 block and 86 AOD Tranny
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sci
Journeyman Posts: 4
From: Chciago
Registered: Oct 2004
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posted 04-15-2005 12:32 PM
   
Will these to items bolt together...I have a 86 AOD out of a murcury Grand Marquis and I have a chance to get a 390 that has been bored out to 428...will this tranny bolt up...I know the flex plate is way different...and I know the tranny will need to be rebuilt to take that kind of punishment...but is it possible?
Thanks
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Fastback68
Gearhead Posts: 3332
From: Sucat, Paranaque, Philippines
Registered: Jul 99
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posted 04-15-2005 12:44 PM
Sorry ... not answering your question ... but are you sure the 390 has been bored out to a 428? It's not a change in crankshaft?
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Scott H
Gearhead Posts: 281
From: Chicago area
Registered: Mar 2005
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posted 04-15-2005 01:04 PM
The bellhousing on your 86 AOD is not compatible with the 390/428 family of engines.
There IS a company making a bellhousing to adapt a c4 to a 390/428, race-quality stuff, means it ain't gonna be inexpensive.
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sci
Journeyman Posts: 4
From: Chciago
Registered: Oct 2004
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posted 04-15-2005 02:14 PM
3.980" stroke nodular iron crank = 10 to 1 compression...What are my options in the original style trannies? Meanning What do origianl trannies cost for an aplication like this...Nothing crazy, just somthing able to withstand 490 hp. As long as it is automatic.
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Thud
Gearhead Posts: 1296
From: Cumming,Ga.,USofA
Registered: Jun 99
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posted 04-15-2005 02:54 PM
Lentech is supposed to make a setup for AOD-to-FE. Bet it ain't cheap though.http://www.lentechautomatics.com/ ------------------
"I only drink to steady my nerves. Sometimes I'm so steady I don't move for months." - W.C. Fields - "I don't care where I sit, as long as I get fed." - Calvin Trillin - Dwayne M&M Member #18
Son of Smurf
'94 Lightning #942 of 4007
'67 Mustang Coupe
'70 Mach1
'75 Cougar
'65 Galaxie 500 + parts car
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74merc
Gearhead Posts: 1159
From: Demopolis AL
Registered: Jun 99
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posted 04-17-2005 01:22 AM
You'd be better off financially to swap to a manual and get a Tremec.86 AOD is a very weak starting point, take it from experience... Its to the point, I'm looking at my tranny as a core charge on a better tranny rather than building it. I'm still working the numbers to see which way will work out better. Bottom line, an original stock 74 302 with bolt ons doesn't do well with the stock freshly rebuilt 86 AOD. The engine is more than it can handle reliably.
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68 S-code GT
Gearhead Posts: 2746
From: Sayreville, NJ, US
Registered: Mar 2000
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posted 04-18-2005 08:45 AM
C6 transmissions are very tuff but they don?t have overdrive.------------------
Ed S. 68 S-code FB GT 4spd(now C6)/3.25 PS PDB
68 J-code(now 289) Cp Sprint"B" C4/3L00-9" PDB PS AC Bla-Bla-Bla
99 F150 XLT Ext/cab, 4X4, 5.4L, 3L55
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Thud
Gearhead Posts: 1296
From: Cumming,Ga.,USofA
Registered: Jun 99
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posted 04-18-2005 08:46 AM
A C6 with a Gear Vendors unit is nice... but costly.------------------
"I only drink to steady my nerves. Sometimes I'm so steady I don't move for months." - W.C. Fields - "I don't care where I sit, as long as I get fed." - Calvin Trillin - Dwayne M&M Member #18
Son of Smurf
'94 Lightning #942 of 4007
'67 Mustang Coupe
'70 Mach1
'75 Cougar
'65 Galaxie 500 + parts car
IP: Logged |
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