TD Hardcore User!
Join Date: Apr 2003
Location: San Antonio Texas
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Re: 3.3 upgrades
There is a 3 spd that bolts to the 2.4 and it is the same 3spd that was bolted to the 2.2, 2.5, and 3.0 with different bellhousing patterns. It can be built to be extremely strong but very few people have any experience doing it. The information is out there on the forums if you really dig.
In my opinion the easiest way to make a 3.3 quicker is to modify the transmission. Thats not to say there are no options to improve the 3.3.. just that you can make the van go much quicker with a completely stock motor by modifying the transmission.
The 604 has multiple ring and pinion and transfer gear sets which you can mix and match to get much lower gearing. The stock van will have a ~3.61:1 diff ratio. You can drop that to 4.28:1 to the best of my knowledge. You can also use a smaller diameter, higher stall torque converter from another application to add a lot of punch at launch and part throttle.
The downside is unless you have mechanic friends who are comfortable swapping out these parts, you would have to pay a trans shop a pretty large amount of money to get this done. So it really depends on who you know..