would a modern (90up) 4 spd automatic fit behind a 70's 351?

 

1. Which 351 as there are 3: 351 Windsor, 351 Cleveland, or 351M? The 351M uses the big-block 429/460 bell housing pattern, while the others use the small- block pattern.
2. There are available, the AOD non-electronic automatic, the AODE electronic-controlled transmission, the E4OD electronic-controlled automatic, and the 4R70W electronic-controlled transmission. For an electronic-controlled transmission to be used in a non-computer-controlled vehicle, an external electronic controller like a Baumann Engineering controller must be used.

 

A lot of 73-79 trucks came with a 460/EAOD combo. An AOD comes in Windsor bell housing & 429/460 pattern. Don't know about the Cleavlands

 

Really, NO! The AOD was brought out in 1980. The AODE came out in 1992 with no 460 hooked to it. The E4OD came out in 1989 developed from the C-6.

 

probably the 3512 winser out of a 1980 unless the aod will bolt up to an older winser out of the 70's

 

All 351w's use the same transmission bolt pattern. The same as the 302, and 351c. I believe the AOD uses the same 164 tooth flex plate as the C6.

 

For fitting the new with the old check out Bendtsen's Transmission Center in Ham Lake, Mn. Guy has some neat stuff including adapters for the Fe's and Y blocks. Has a adapters for a Ford 223 straight 6 to a AOD. Check him out and he is very helpful.

Bendtsen’s Transmission Center Inc. 763 767 4480
13603 Johnson St NE, Ham Lake, MN. 55304
bob@transmissionadapters.com

 

Any of the OD transmissions offered behind a "Windsor" 302, 5.0L, 351W, 5.8L, will bolt right up to the block, but one must be sure to have the correct flexplate for the trans being used, as the "offset" is different on some of the later ones.
But, be forewarned, with the exception of the AOD (which is an overdrive trans, but not electronically controlled), unless you are running an OEM EFI, (in which case the ECM also takes care of controlling the transmission), all the other OD automatic transmissions are electronically controlled (AODE, E4OD, 4R70W) and will require the use of an aftermarket stand alone transmission controller.......

James

 

The AODE, 4R70W and the E4OD can be run behind a either a carbureted or EFI engine with a stand-alone shift controller --such as a Baumann/U.S. Shift controller.

As an example, the Fox Mustang 5.0L EFI engines, '86-'93, did not have any PCM control of the transmissions. The ECM only controlled the engine but not the transmission. Transmission shift control was not integrated into the engine control modules on the Mustangs until 1994, when the AOD was replaced by the AODE. In '96, the AODE in the Mustangs were replaced by the much improved 4R70W.

The 4R70W from a 3.8L Mustang, 4.2L Ford truck or a 5.0L Explorer will all have the 'Windsor' bell pattern. The simple way to determine if a 4R70W is for a 'Windsor' bell patten o,r if it's for a 4.6L/5.4L engine, is to look at the number of bolt holes for the starter. If there are 3 bolt holes for the starter, the transmission is for a 4.6L/5.4L engine. If there are only two starter bolt holes, the 4R70W is for and engine with the 'Windesor' bell pattern.

The AOD came out in 1980 ('80-'93). the best versions of these are from 1988-1993.

The 4R70W came out in 1993. The best versions of it are from 1998-up.