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Ryan, you will need the complete 2 wheel drive trans. It is a remote side shifting 5 speed trans with an aluminun bellhousing, cast iron front housing with a power take off option, then a cast iron center and finally a 10 bolt rear cast iron housing that has a land cruiser style e-brake drum on it. The trans is called R452 and when I build one, the complete gear set must be used. It was never made for a 4 wheel drive truck so I must use the housings, shift rods, and output shaft from a R150F or R151F core.It was used in Hino trucks and found behind the 2LT, and 3LT diesels. I have seen '88 thur '97 model trans.It is also found in Dyna 150 trucks with the 3L diesel engine.They also call it the R452 transmission.
The R150 and 151 both have the same cluster gear ratio which is 1.482 andboth have the same overdrive gear ratio of 0.565. So 1.482 x 0.565 = 0.83 =17% overdrive.But the R154 has a cluster ratio of 1.117 and an overdrive gear ratio of0.674. Therefore, 1.117 x 0.674 = 0.75 = 25% overdrive.But if I use either the R150 or 151 overdrive gears (0.565) in my R154 its1.117 x 0.565 = 0.63 overdrive.The R452 also has a different cluster of 1.769 but also a differentoverdrive gear ratio of 0.469 so 1.769 x 0.469 also = 0.83 = 17% overdrive.But if I use these gears in my R154 it becomes 1.117 x 0.469 = 0.52 = 48%overdrive.No point in using the R154 overdrive gears in a R150/151 as its 1.482 x0.674 = 0.99 !!!!!! You don't need another top gear.But what if you use the R452 overdrive gears (0.469) in a R150/151. Thismeans 1.482 x 0.469 = 0.69 = 31% overdrive. There you have it, LOL.
Does anyone know the following to be true. I am interested in throwing the R452 overdrive gear in place of the 5th gear in an R150F to bring down my cruising speed on the highway/freeway. I will have it coupled with a 1UZ and 5.29's in the rear. Would I simply be able to replace this single gear, or would I need much more (the whole cluster etc...)Also, has anyone been able to chase down a supplier/vendor for parts on these transmissions in the US?
Don't know but I'm trying to find out the exact same thing
I'm about 99% certain that you can, but I just have no idea how to get a hold of one. If you have info, please do share.
Marks Adaptors no longer do the kit with the R452 transmission because the core transmission was so difficult to get hold of
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