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think we keep crushing crushtubes under full throttle power runs we killed another tonight

It's time to fit a solid spacer & shims, instead of the crush tube.

Must be making a mess of the pinion bearings if the crush tube is letting go!

yeah i agree, machine up a solid 'non-crush tube'

Yup solid tube and shims for sure. Might be worth looking into the bearings being used too - it must be making some hellish torque! Where do you find 3.89's this side of the ditch? Very interested - i have some 4.11's i robbed out of a VL wagon a mate wrecked but i fear they will have me leaning on my motor a bit much but 3.89's & third gear would be about ideal.

3.89s are typically ex-pintara gears

darcy wrote:3.89s are typically ex-pintara gears

Yeah mate and rare as rocking horse droppings in NZ.

The 3.91 (replaced the 3.89, some fault with whining or such) is available in the R31 Skyline six cylinder 3.7 manual and 3.91 auto if I recall correctly, the 4.11 is 4 cyl Pintara. Seen a few around and currently have a set in my Torana

I'm not directly disagreeing with the solid crush tube idea but if you only had axle problems with the diff before and now its suddenly got pinion issues it doesn't sound like its been set up correctly

next thing on the list to make horrible noises and die one T5 dead and buried no teeth left on either 3rd gear cog i lie there is 1 and a half teeth left LOL didnt like 3rd gear power runs while tuning its had a hard life though made it through maybe 2000km max of being turbocharged

Now the T5's the weak link eh? hate that buts always a sign your making plenty of power when you keep breaking shit behind it

Makes me think i'll stick with my 3.08:1 gears and 2nd