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Carrera RSR
Joined: 08 Jan 2010
Posts: 2312
Location: Somerset, UK
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 Posted: Sat Sep 27, 2014 4:21 am Post subject: G31 diff removal and refit |
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So once the diff cover is removed from the side of a G31, does the diff easily pull out and be replaced by a Quaife LSD without any other stripping of the box? Haynes and FSM are no help and couldn't find anything here via Google search. Thanks
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1980 931 - forged pistons, Piper cam, K27/26 3257 6.10 hybrid turbo, 951 FMIC, custom intake, Mittelmotor dizzy & cam pulley, H&S exhaust, GAZ Gold, Fuch'ed, Quaife
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jason c
Joined: 13 Jan 2014
Posts: 1018
Location: Nwi
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| Posted: Sat Sep 27, 2014 10:55 am Post subject: |
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| You'll have to strip the box. Because the diff must be shimmed sided to side and the main cluster with the pinion shaft will likely need to be shimmed in or out when replacing the diff or carrier bearings, the trans will have to come apart anyway. The diff is not plug & play. |
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v8carreragts
Joined: 05 Sep 2003
Posts: 665
Location: Tucson, AZ
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| Posted: Sat Oct 11, 2014 11:26 am Post subject: |
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You shouldn't have to do anything to the pinion shaft. The only time you would need to change this is if you replace the shaft bearings or, of coarse, change the ring and poinion. The diff center lines will be exactly the same. But you will need to adjust the position side to side with shims and adjust the bearing preload.
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jason c
Joined: 13 Jan 2014
Posts: 1018
Location: Nwi
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| Posted: Sat Oct 11, 2014 1:56 pm Post subject: |
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| v8carreragts wrote: | | You shouldn't have to do anything to the pinion shaft. The only time you would need to change this is if you replace the shaft bearings or, of coarse, change the ring and poinion. The diff center lines will be exactly the same. But you will need to adjust the position side to side with shims and adjust the bearing preload. |
Ideally yes but it always seems to need adjustment, that's why I said likely. Should have said possibly. It depends on how much wear it has.
The races will have to pressed out & in to adjust the shim size for the carrier bearings, the gearset will need to be removed to check the diff backlash and the pinion will have to be removed to check preload so trans removal will be necessary which was carrera's concern. Sorry I didn't explain it better the first time. |
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Carrera RSR
Joined: 08 Jan 2010
Posts: 2312
Location: Somerset, UK
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| Posted: Sat Oct 11, 2014 6:33 pm Post subject: |
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Don't have the inclination to do a strip and build. So the Quaife will stay in its current gearbox and I'll fit that complete and test. I now have four boxes. I'll collect some necessary rebuild parts and rebuild one next year. Think I'll road test each box and see how each performs. Should be able to build one good box out of four!!
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1980 931 - forged pistons, Piper cam, K27/26 3257 6.10 hybrid turbo, 951 FMIC, custom intake, Mittelmotor dizzy & cam pulley, H&S exhaust, GAZ Gold, Fuch'ed, Quaife
Now www.924board.org/viewtopic.php?t=34690
Then www.924board.org/viewtopic.php?t=31252 |
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