4.2 to 302

[morefried]

will a 302 bolt up to 4.2 tranny? and has any ever did one of these

[true4.2]

nope...aint gonna happen. I haven't even looked into it, but I seriously doubt any 302 will just bolt up to our tranny.

[morefried]

I was just woundirng cuz the long block looks a lot like a 302 with a couple pistons missing

[ratstang]

I heard that it will bolt up. Our motors are just a stroked 3.8. It might be more of a challenge to get the back of the 302 to fit.

[true4.2]

Our motors are a stroked 3.8 yes, but I don't think the transmission bost pattern or whatever matches the 302 bolt pattern.

[V6Mustang]

Originally Posted by true4.2

Our motors are a stroked 3.8 yes, but I don't think the transmission bost pattern or whatever matches the 302 bolt pattern.

The 3.8 (so I assume the 4.2 does too) has the same bellhousing bolt pattern as the SBF. I believe the input shaft length is different, or maybe the # of splines on the input shaft is different, or both. You'll also need to get the right flywheel/clutch combo.
From what I've read on this site about the Mazda transmissions in the 4.2's, even if you get it all to work properly the 302 torque will kill the tranny real quick anyway.

[k_krett]

Why don't you just get an M50D out of the truck your getting the engine out of and put that in there too. If the crossmember needs to be modified, modify it, you'll have a lot better truck in the end than a 4.2 truck.

[strick4.2]

From what I've read on this site about the Mazda transmissions in the 4.2's, even if you get it all to work properly the 302 torque will kill the tranny real quick anyway.


I cant remember any stock 302 truck engine that was a big torque monster???ive owner a couple early 90s models and they werent all that strong......modified yes, stock I think it could hold up...... am I wrong????

[homer4.2]

weve got one of the 302, all i know is it can ROAST EM!! that thing kicks and the tires wont b stoppin..its pretty beastly

weight in the bed / trailor does bog it down more than i thought though..

[V6Mustang]

Originally Posted by strick4.2

I cant remember any stock 302 truck engine that was a big torque monster???ive owner a couple early 90s models and they werent all that strong......modified yes, stock I think it could hold up...... am I wrong????

Depends if you're fond of dumping the clutch often
The 302 doesn't make a whole lot of torque in stock form, right around 300 ft-lbs, about 50 more than the 4.2 does. But who wants a stock engine

[homer4.2]

And the 4.2 has 10 more hp than those old 302's, the 5.0's....

[true4.2]

The 3.8 (so I assume the 4.2 does too) has the same bellhousing bolt pattern as the SBF. I believe the input shaft length is different, or maybe the # of splines on the input shaft is different, or both. You'll also need to get the right flywheel/clutch combo.

Ok, that's what it was then. See, if a 302 could just bolt right up to our tranny's...wouldn't there be a LOT more people with an F150 with a 302 on a M5OD. I've never even seen one personally although I haven't really checked.

[V6Mustang]

Originally Posted by homer4.2

And the 4.2 has 10 more hp than those old 302's, the 5.0's....

Tell me about it, I just picked up an '84 Mustang GT with a 5.0, 4-barrel carb. 165hp Oh well, hopefully next year some time I will be able to begin adding to that number

[homer4.2]

heh, yea its funny how a 5.0L is alot bigger than our engine AND its a v8 and we still put out 205 hp compared to 165.......technology does wonders

in 20 years a v6 (if they dont have hovercrafts) will put out like 500 hp stock

[true4.2]

No, in 20 years we will probably be running all electric vehicles due to gas prices being $321/gallon.

I'm thinking honestly, that gas vehicles will be considered 'classics' in the next 50 or so years.