Buhundred

A 1KZ? Stuff a Cummins 12 valve in that thing!

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96' 4Runner SR5

Bone Stock, 100K as of 7-9-09

ChristianJS

... Id rather use that as a ground anchor, the cummins that is!

I have been trying every possible route to find out what the difference is between the Dyna R451 and the R452. Yesterday I spend 1½ hours at Toyota looking at numbers and applications but that did not make me any wiser.
But falling asleep I might have had a small epiphany, I think the R451 is R151F gears in a Dyna box, the gearing are all the same!

• R150F 3.830 2.062 1.436 1.000 0.838 4.22
• R151F 4.313 2.330 1.436 1.000 0.838 4.843
• R452 5.146 2.780 1.509 1.000 0.838 5.035
• R451 4.313 2.330 1.436 1.000 0.838

So my thought is, just buy the R451 because it has cable operation. Wait untill a set of R452 5th sprockets turn up, and install the then. Then we will have essentially a R151F with a 30% overdrive in a cast iron casing.
Does it sound correct to you all?

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