A couple of reasons,
1) My present tranny is on borrowed time (3- 4 gear slider)
2) I already have this tranny out of my (former) Syncro parts van
3) The Syncro trans has a locker diff for better traction and the low range can also be good in certain off-road situations.
4) Also the high reverse great on Vanagon 2WD trans is lower with this trans.
No this won't change my van into a "1/2 Syncro", but I got the trans and I hope to improve the real poor off-pavement traction of the van. I know a Limited Slip is better, but this is what I own and I can't afford or justify a LSD with tranny re-build.
Wish I had kept the rear gas tank from the syncro to use to add rear weight bias in hopes of trying to approach bay window van performance off road!
I think a change to 15" tires that you can lower the high tire pressure would help wonders off-road as well - but that's not happening anytime soon.
John