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conversion bj40 1hz

Tech Talk for Cruiser owners.

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Location: williamstown

conversion bj40 1hz

Post by bejjal_fj40 »

Hey guys, I have done bj40, conversion with a 1hz out of a 100 series with the gearbox transfercase but i have the problem with my back tailshaft the angle is not right. It is hitting the universal joints what can I do to over come this problem I no I have to angle the diff but how much and what sort of tailshaft can I use if you could help would be much appreciated.

cheers Jacob
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Location: South Australia

Re: conversion bj40 1hz

Post by bad_religion_au »

cut the spring perches off your diff, weld new ones on with the diff pointed straight at the pumpkin with full weight on the springs. use a double cardin joint driveshaft.

i'm assuming your problem is because the drivetrain is too long, resulting in a stupidly short rear shaft. otherwise, ignore my advice
Spit my last breath
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Re: conversion bj40 1hz

Post by vk7ybi »

How do you point the diff at the pumkin?

What I think hes trying to say is point the rear pinion at the transfer case rear output.. If you did do this, then you might have to address outer pinion bearing oiling issues..
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Re: conversion bj40 1hz

Post by Frankenyota »

Have a read of the bellavista, get yourself a angle finder gauge and check your set up.
http://www.pirate4x4.com/tech/billavist ... x2.htmlion" onclick="window.open(this.href);return false;

If your shaft is too short, the driveshaft angles will be too steep for the uni joints. Going through this at the moment.
You can rotate the rear diff pinion to point at the transfer case and run a double cardan cv joint at the transfer case end.

Down side to the double cardan is the cost.
Maybe move the rear diff back and lower the transfer to improve angles?

Matt
'83 dual cab lux, v6 auto, duals, RUF, crossova steering, IFS rears, 35" MTRS
2000 HZJ105 turbo with extras
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Re: conversion bj40 1hz

Post by De-lux »

Put some pics up of this conversion mate... sounds interesting!!
indubitably
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Re: conversion bj40 1hz

Post by Dannyboy »

you could go 60 series or custom rear springs to move the diff back a bit as well then use a longer shaft.
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Re: conversion bj40 1hz

Post by bj on roids »

I would flip the rear springs around, and post up some pics. I think flip the rear springs, and you might be okay. If its just too short a drive shaft issue.
hands and mums dont count!!!
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