3x3 & Type 2/4 Stub Axle Issues

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CBDZ
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Joined: Mon Jun 01, 2009 9:22 am

3x3 & Type 2/4 Stub Axle Issues

Post by CBDZ »

Hello All,

Its been a long time since I have been active here. I miss all the good conversation and banter.

I recently purchased a set of (assumed) EMPI 3x3 rear arms. Previously I had installed and have been using, with out any issue, stub axles to use larger Type 2/4 CV joints, on stock arms.

I have swapped all the bearings and spacers from the old to the new, and now have clearance issues with the back of the bearing housing, hitting the back of the axle stub CV flange. From my point of view, the bearing is too far in the housing, letting the axle to push into the back-side too far.

Has anybody heard of a similar issue?
My Car Details:
Fiberglass Buggy on 1973 Chassis.
1904 cc
Megasquirt (MS1 with 3.57 board) Fuel Injection: German Intake Plenum, CB Performance End-Castings, Ford Escort Throttle Body with custom Adapter, MS controls Wasted Spark Coil Pack
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Leatherneck
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Re: 3x3 & Type 2/4 Stub Axle Issues

Post by Leatherneck »

Did you measure the old and new parts to see if any difference? BTW, good to have you back. Don’t be a stranger this time.
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CBDZ
Posts: 183
Joined: Mon Jun 01, 2009 9:22 am

Re: 3x3 & Type 2/4 Stub Axle Issues

Post by CBDZ »

Was hoping to not take the entire bearing assembly apart to deal with this. Was hoping that somebody had a similar issue, and could give me a simple suggestion to remedy the problem.

I was never a stranger before. Life got in the way, and there wasn't much activity over the past few years.
My Car Details:
Fiberglass Buggy on 1973 Chassis.
1904 cc
Megasquirt (MS1 with 3.57 board) Fuel Injection: German Intake Plenum, CB Performance End-Castings, Ford Escort Throttle Body with custom Adapter, MS controls Wasted Spark Coil Pack
Ol'fogasaurus
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Joined: Mon Nov 13, 2006 10:17 pm

Re: 3x3 & Type 2/4 Stub Axle Issues

Post by Ol'fogasaurus »

viewtopic.php?f=28&t=148615&p=1234489&h ... s#p1234489

This is the stack up for the three spacers in the rear. Installing them wrong is often a problem like you described.

Lee
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CBDZ
Posts: 183
Joined: Mon Jun 01, 2009 9:22 am

Re: 3x3 & Type 2/4 Stub Axle Issues

Post by CBDZ »

Update: I swapped the stub axle with a stock unit that I have. No Issue. So apparently the shape of the stub axle was just convex enough to cause interference. I ground the back side of the flange just enough to provide clearance.

Problem solved, even though nobody has ever seen this issue in previously.
My Car Details:
Fiberglass Buggy on 1973 Chassis.
1904 cc
Megasquirt (MS1 with 3.57 board) Fuel Injection: German Intake Plenum, CB Performance End-Castings, Ford Escort Throttle Body with custom Adapter, MS controls Wasted Spark Coil Pack
Ol'fogasaurus
Posts: 17881
Joined: Mon Nov 13, 2006 10:17 pm

Re: 3x3 & Type 2/4 Stub Axle Issues

Post by Ol'fogasaurus »

CBDZ wrote: Tue Jul 02, 2019 2:07 pm Update: I swapped the stub axle with a stock unit that I have. No Issue. So apparently the shape of the stub axle was just convex enough to cause interference. I ground the back side of the flange just enough to provide clearance.

Problem solved, even though nobody has ever seen this issue in previously.
Something I don't remember have had heard of before. I have heard of guys having to slightly shorten the half-shaft before (don't remember a reason given though) and others not having any problems with the swap. Could be a couple of things causing the incident such as tolerance problems with the arms and maybe the stub shafts adding up together.

Glad you got it solved so easily.

Lee
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Leatherneck
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Re: 3x3 & Type 2/4 Stub Axle Issues

Post by Leatherneck »

Thanks for the update with fix. Good info to have.
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