80x pitman arm fabrication

[rockcrawler31]

Hi all

one thing i've noticed about using a 75x steering box with a 80x front axle housing is that the 75 pitman arm is shorter than the 80version. So i've found that the steering at full lock is less than what it used to be. I.E. with the steering box at full lock there is still room at the knuckles/stops to turn further.

1. Is it possible to fabricate a pitman arm with the spline and key spline to fit a 75 power steer box, the same length as an 80 arm? I'm guessin the original is cast steel. Who could do this - anyone in Oz? any overseas suppliers?

2. would it be legal (in queensland - the rest of the conversion has been blue plated)

3. I would probably have to move the steering box forwards about 25 mm for the draglink to clear the rest of the components, Is this as simple as re-drilling the holes and putting crush sleeves in? Again, would this need engineering? There should be enough spline on the slip shaft on the steering shaft to accomodate this.

[RUFF]

You cant just use an 80 arm? The splines are the same.

[rockcrawler31]

You cant just use an 80 arm? The splines are the same.

Really? i was sure someone said they were different. no matter.

do you know if it's been done? The 80 arm faces forwards, do you know if the key spline would be on the correct side? How would you go about grinding a keyway in the pitman arm on the correct side?

Interesting.

[RUFF]

You cant just use an 80 arm? The splines are the same.

Really? i was sure someone said they were different. no matter.

do you know if it's been done? The 80 arm faces forwards, do you know if the key spline would be on the correct side? How would you go about grinding a keyway in the pitman arm on the correct side?

Interesting.

Im not sure there is a keyed spline on the 80 pitman. The 80 pitman fits a Hilux box so i dont see any reason it wont fit the 75 box.

[rockcrawler31]

You cant just use an 80 arm? The splines are the same.

Really? i was sure someone said they were different. no matter.

do you know if it's been done? The 80 arm faces forwards, do you know if the key spline would be on the correct side? How would you go about grinding a keyway in the pitman arm on the correct side?

Interesting.

Im not sure there is a keyed spline on the 80 pitman. The 80 pitman fits a Hilux box so i dont see any reason it wont fit the 75 box.

Awesome, i'll give it a crack. on a similar note, i've tried getting the pitman off before with a tierod joint puller,and all it did was mangle the end of my puller. that bas*ard is on there good and proper. Any suggestions?

[Ice]

You cant just use an 80 arm? The splines are the same.

Really? i was sure someone said they were different. no matter.

do you know if it's been done? The 80 arm faces forwards, do you know if the key spline would be on the correct side? How would you go about grinding a keyway in the pitman arm on the correct side?

Interesting.

Im not sure there is a keyed spline on the 80 pitman. The 80 pitman fits a Hilux box so i dont see any reason it wont fit the 75 box.

Awesome, i'll give it a crack. on a similar note, i've tried getting the pitman off before with a tierod joint puller,and all it did was mangle the end of my puller. that bas*ard is on there good and proper. Any suggestions?

Heat

[rockcrawler31]

Heat

Noice mate. thanks.

would that render the pitman arm coming off rooted? As in annealed and buggered?

[bru21]

support the arm on one side against an anvil or vice so the shaft is under no load. Hit the side of the arm where the spline is. Works well for TRE's.

I have a leaking 80s box with pitman arm. Yours for $100

0402337734

[rockcrawler31]

support the arm on one side against an anvil or vice so the shaft is under no load. Hit the side of the arm where the spline is. Works well for TRE's.

I have a leaking 80s box with pitman arm. Yours for $100

0402337734

mate, depending on how the brother in law goes at getting prices today i might just take you up on that. Where in Brizzie are you?

[Ice]

Heat

Noice mate. thanks.

would that render the pitman arm coming off rooted? As in annealed and buggered?

If your heating it to red hot to remove it you deserve for it to be buggerd



if your concerned on temp get your self some heat crayons

[chunderlicious]

what bru said. hit the pitman arm where it is on the spline of the shaft. will take several hits with a big hammer but it will come off.

toyota have them for quite cheap ($120ish from memory brand new)

[Ice]

heat was the suggestion as he said he has a tie rod puller

personally i have a 30ton press which makes life easy

[rockcrawler31]

heat was the suggestion as he said he has a tie rod puller

personally i have a 30ton press which makes life easy

thanks for all the suggestions guys. I'm looking forward to no more 40 point turns

[bru21]

I'm in Buderim on the sunshine coast.

[80's_delirious]

If you dont want to heat it, you can get a pitman arm puller fairly cheap, like an oversized tierod puller. Put some tension on it with the puller then strike the arm on the side to dislodge it.

80s pitman arm has no keyway, splined only.

[pinkfloyddsotm]

be interesting how you go with this

[tiny80]

beware your shaft is not twisted as this has happed to me.
twists in the shaft brake when a a puller is used or the puller brakes
thats what could of happend so check shaft where seals into power steering box and heat should no be used as it will damage seals in box and pit arm to much to re use for safety sake broken box no steer

[Ice]

beware your shaft is not twisted as this has happed to me.
twists in the shaft brake when a a puller is used or the puller brakes
thats what could of happend so check shaft where seals into power steering box and heat should no be used as it will damage seals in box and pit arm to much to re use for safety sake broken box no steer

Mate if your putting that much heat into it to damage the seals, its not a process you should be using....

[rockcrawler31]

Well an update for all those interested.

I have found that the 80 series arm is in fact THE SAME LENGTH!!!

Sooooo....... Does anyone know if the 80 series box has a greater angle of sweep in the box itself???? It's the only thing i can think of. At full lock on the 75 box, the stops on the knuckles aren't touching. So with a similar size pitman arm it MUST be the angle which the box can turn to surely......

Any ideas?

[bru21]

sorry to hear that dude!

Maybe knuckle mount is different length?

[Z()LTAN]

you need longer swivel plane arms...

[DamTriton]

you need longer swivel plane arms...

Shorter, actually.

This will allow the available Pitman arm "throw" to reach more of the hub swivel's "arc".

[Z()LTAN]

lol right you are!

[bj on roids]

80 and 75 do interchange, so do hilux 40 and 60 series, BUT all the cone tapers (tie rod end) are different.... but an easy fix, just get the TRE you need and screw that to your rod.

[rockcrawler31]

80 and 75 do interchange, so do hilux 40 and 60 series, BUT all the cone tapers (tie rod end) are different.... but an easy fix, just get the TRE you need and screw that to your rod.

Still leaves me trying figure out how to get the 75 box to turn further. 75 and 80 arms being the same length. Apparently some hilux boxes have decent arc of turn and are as big as the 75 box.