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Old 07-06-2006, 03:18 PM   #1 (permalink)
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Pitman Spline - Toyota Box?

I'm thinking about doing a custom Pitman arm for my Isuzu box (installed, ready to rock) vs. installing a Toyota box and Toyota Pitman (would take more effort). The short story is that Isuzu uses a funky between-centers dimension that I have matched my steering arm to, but if I can swap a Toyota arm to get the drop I need, I could upgrade to high steer for about the same cash as paying a GOOD weldor (not me!) to fab up a custom Pitman arm from my old one.

It occurred to me that there is a *faint* chance that one might interchange with the other (sorta like Aisin trannies bolt up behind Toyota and Isuzu motors)... does anybody in the Sacramento area have a spare Toyota Pitman that I could try on my Isuzu box, or a spare Toyota box that I could try my Isuzu Pitman onto?

I know there are many ways to skin this cat, but help me rule THIS ONE out.

Randii
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Old 07-06-2006, 03:32 PM   #2 (permalink)
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Have you seen this in the FAQ....

Pitman Arms - Dimension of other arms

/forum/toyota-truck-4runner/101077-dimensions-other-pitman-arms.html
/forum/toyota-truck-4runner/294202-legend-daihatsu-rocky-pitman-arm.html
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Old 07-06-2006, 04:07 PM   #3 (permalink)
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I have a spare box!!!! It is apart, but that does not matter!!!
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Old 07-06-2006, 05:50 PM   #4 (permalink)
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I scanned the FAQ for 'spline' but had missed the Daihatsu interchange. That gives me even more hope for the Toyota splines... the actual drop and between-centers dimensions are somewhat secondary to identifying whether the splines match. I didn't see spline count anywhere in there, FWIW.

Dave... your phone will be ringing shortly!

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Old 07-06-2006, 08:55 PM   #5 (permalink)
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The Toyota IFS pitman arm / steering Sector shaft of teh steering box is a tapered spline that has 48 teeth and has a diameter of approximately 30MM.
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Old 07-06-2006, 10:41 PM   #6 (permalink)
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Quote:
Originally Posted by 4RnrRick
The Toyota IFS pitman arm / steering Sector shaft of teh steering box is a tapered spline that has 48 teeth and has a diameter of approximately 30MM.
That's what I got when David lent me a scribe to count the splines on his er.... well, shaft. I couldn't find that in the FAQ, can that be added?

FWIW, the Isuzu shaft is about the same size but uses a visibly more coarse shaft with a 40-spline regular pattern, -1 spline fo a doubled-key section, so that there are actually 39 splines, with one double-width.

No go. Looks like I'll have to ponder some other Frankenstein concoction.

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Old 07-07-2006, 08:43 AM   #7 (permalink)
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I already added it to one of the links I post from teh FAQ.....

http://www.pirate4x4.com/forum/showthread.php?t=101077
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