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Thank you for the link to the OD 5th gear.
Man, I wish the USA got the later-model Hilux. They are so badass.
Question. Are the output shafts interchangeable between early and late R's? Could one source a late shaft, and the Dyna gear, and transplant into the early R-series?
I'd probably also CSI your usage requirements ensuring you'll actually need 10.7 total low range..... dual 2.28's at 5.2 is pretty low! 2.28 and 4.7 at 10.7 is like....holy low and slow.
I'd get the total spline 23 spline input shaft from Marlin for the rear box. And I'd put the 4.7 gears in the rear box and 2.28's in the crawler box. If you put the 4.7's in the crawler box then the multiplication torque is going into the input shaft of the rear box. Not really ideal when you can just put them at the last chain of output.
I'd probably also CSI your usage requirements ensuring you'll actually need 10.7 total low range..... dual 2.28's at 5.2 is pretty low! 2.28 and 4.7 at 10.7 is like....holy low and slow. Major rock crawling trails all day kind of low. Might save yourself the money and keep er dual 2.28's? Although I suppose having 10.7 at the t-case could make up for a high geared diff if that was the intention.
4x4wire review of the 4.7 gear set suggests there's more slop in the gears... A reason I wouldn't bother going with 4.7's for sh*ts n gigs.
Food for thought, anyhow.
This. I have dual 2.28 and have never needed more. IMHO, 2.28 + 4.7 is marketing hype and a conspiracy to separate you from your money. It's also something you can brag about to your buddies. I guess under extreme rock crawling it might be useful, but I just can image where 2.28 + 4.7 + 1st gear could be practical.
Why? The H55F, which I believe came behind the 1HZ, is a stronger tranny.I need a pickup. Maybe this R151F should go in a 75 series or 79 series? Can you mate a 1HZ to an R151F out of a mini-truck?