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| stockstandard |
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It is not quite as simple as just shimming the pinion either. Here is some info that was sent to me a while ago (hope the person doesnt mind me posting it here)
Quote: Ok Ive got some info for you. As previously stated, the crown wheel and ring gear on my 75 series 3.7:1 gears are approx ¼" smaller than the 78 series gears that are found in E series falcons. I pulled several diffs apart at a wrecker up here and found that no series of skyline or pintara ran the 78 series stuff. I spoke to a couple of reputable diff workshops within an hours drive of where I am, and both of them said the same thing "the differences and how to make them work are trade secrets, however we will install it for you"...
OK so here is what you have to do. The pinion on both series is indexed to the hemisphere in the same spot, otherwise the mesh would never have been able to work. Due to the smaller pinion dia, the pinion has a tapered shoulder as the pinion forms from the back of the bearing cone, unlike the 78's which seem to come up parallel to the back of the cone. This offset is approx ¼", which I thought was designed in to the gears to make it work. There is the catch however, you still need to move your pinion in a bit further. My pinion took 0.098" and I achieved perfect tooth contact. I need to make some other shims for the side bearings as I have a touch too much backlash, and this has effected tooth contact slightly, making the contact area slightly heel bound, but not by much.
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| gogetta |
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falconkid wrote: my EL 3.08 diff is a 75 series. i fit 3.9's in it fine.
JIM what was the number on the 3.9s? did u fit them yourself or take it to a shop... EF/EL 3.08 diffs do seem to use 0575 gears, but why dont the 4.11s fit it then?
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| gogetta |
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falcon_3512003 wrote: got the 4.11 pintara center all is good with the crown fiting on my center but the pinion seems to bit by about 7mm it wont tighten up anyone had this problem and what did they do aparently there are two tipes of diff housings for the ef's ??
maybe its not the diff, maybe its something your doing.. not actually sure i understand what the problem is..
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| falcon_3512003 |
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good info stockstanded think im guna give up on this and put my 3.08 back in for now to i find somthing thats going to work i only wanted theses 4.11 gears in for the easternats and im runing out of time lol
_________________ now have a series 1 au starting the mods slowly |
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| falcon_3512003 |
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nar iv done diffs be for gogetta
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| stockstandard |
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I wouldnt be surprised if the 4.11 pintara gears are different to the 3.7/3.9 R31 skyline gears.
Besides the obvious difference in ratios...
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| falcon_3512003 |
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i was going to go for the skyline gears yesterday wen i got the pintara one but the skyline was on the bottom of a load of cars and the pintara was easy to get to so maby i stuft up in my chose
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| NUTZEF |
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i got told that el diffs wont fit in ef cause top arms and mounting points are different
_________________ WOLF V500, t66(ar70 compressor), rochester 550cc injectors, borgg 265l fuel pump, 48mm turbosmart gate, turbosmart plumb back bov, 600x300x100 cooler, 3 inch zorst , 3.45 lsd, xr6 head, wade 1604 cam, adjustable cam gear, K&N pod filter, on 10psi and manual convertion exedy button clutch. 285.6rwkw |
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| falcon_3512003 |
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ok guys got it all sorted out today cost me 80 buks to have it fitted to my housing and its all good just finished takeing it for a test drive and it has no noises or anything all it was is the pinion bearing was smaller witch made up the 1/4 slack now all i have to do is sort out the speedo lol it still cut when it hit 180
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| stockstandard |
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So there are 2 sizes of pinion bearings?
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| falcon_3512003 |
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yep the pintara one is smaller and all he done was put a new bearing on thats the same as the 3.08 pinion bearing he said skyline are same to have to change them aswell to fit
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| falcon_3512003 |
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when the speedo cuts out at 180 what determins this the speedo or the gear box and whats the best way to get it back to normal reading for my gears now ?
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| falcon_3512003 |
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bump
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| Steady ED |
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Gearbox, fairly sure it goes speedo sender > ECU > dash.
Best bet is a speedo corrector between the ECU and dash.
_________________ ED XR8 Sprint - S-Trim, V500, 249rwkw |
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| falcon_3512003 |
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ok cool can you buy the right gearing for the auto insted of the device if so were can i get one
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