A450/A440 similarity rumors started with me...the A450 is a development of A440/A442, as documented by something I found Googling. I wondered if bolt patterns on front and rear of A440 and A450 cases might be the same, ASTR measured/photographed/traced his A450 which I compared to my A440, and the bolt patterns are the same. 4HE1 bellhousing will bolt to front of A440 case. A440 transfer case adapter will bolt to back of A450. Input and output shafts (length, spline count, diameter), torque converter (stall, size) and flexplate are all different between 4HE1's A450 and cruiser A440. Who knows how similar they are inside. ASTR is looking at whether it's possible to swap A440 output shaft into A450 to allow a 4HE1/A450 from a '98 up (I think) NPR to bolt into an FJ62 with motor mounts and a shaft swap. No telling if that's possible yet. Stock A440 shift points and torque converter would be a poor match to torque and RPM range of 4HE1 (or 4BD1/2 for that matter) without a rebuild, Aussie valve body and low stall torque converter, IMHO...not to mention that used A440 output shafts are often knackered. Since 4HE1 bellhousing bolt pattern is apparently different (I have no first-hand knowledge), it looks like 4HE1 and 4DB1/2 swaps are headed in two different directions. 4BD1/2's auto is totally different, so that bellhousing won't help us get to a cruiser tranny. What I've described might get a 4HE1/auto in an FJ60/62/FJ80, but doesn't help get a 4HE1 in front of a manual tranny that has a transfer case on the back. Isuzudieselswapper's adapter looks like it'll make a 4BD1/2 look like a GM block. To get a 4HE1 in front of a 4WD manual tranny, you would use a 4HE1 auto or manual bellhousing (think clutch throwout here!) modified or used as basis for an adapter to some tranny, OR you could find an Isuzu NPS (4wd version never sold here) 5 speed OD tranny/transfer IF they're passenger drop.
Does that help?
Steve
Quote:
Originally Posted by 68raisin
I think I answered most of my ?'s by rereading posts 40,45,82.
*The 4HE definitely has different block bolt pattern than 4BD series.
*The 4HE definitely has the aw450.
*The aw450 and a440/442 are similar transmissions, but to what extent?
Now I want to know if the aw450 and a440 share the same case. Possibly the a440 would mount up to the 4HE bellhousing, or the aw450 would mount up to the toy tranfercase after output shaft swap.
I think I've seen these ?'s posed already. Does anyone know if there are any answers yet?
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