Mike Rowe Posted March 25, 2008 Share Posted March 25, 2008 Hi can any one advise on what they have done when using the RB20 sump for the zed regards the gearbox bottom mounting bolts? IE The standard RB26 4wd sump has provision for bolting the gearbox bottom bolts into the sump. When you fit the RB20 sump as required to clear the crossmember in the Z, this does not have the bolt holes at the back for the bottom gearbox bolts. I purchased the two side plates that bolt between the gearbox and the side of the RB20 & 25 block but the RB26 does not have the side block mounting points. Hence the RB25 gearbox can only bolt to the RB26 by the top bolts leaving the bottom unsecured. I am concerned this will allow movement between the motor and gearbox and the consequent problems? Anyone got anu suggestions? Quote Link to comment Share on other sites More sharing options...
240Z_Master Posted March 25, 2008 Share Posted March 25, 2008 Hi can any one advise on what they have done when using the RB20 sump for the zed regards the gearbox bottom mounting bolts?IE The standard RB26 4wd sump has provision for bolting the gearbox bottom bolts into the sump. When you fit the RB20 sump as required to clear the crossmember in the Z, this does not have the bolt holes at the back for the bottom gearbox bolts. I purchased the two side plates that bolt between the gearbox and the side of the RB20 & 25 block but the RB26 does not have the side block mounting points. Hence the RB25 gearbox can only bolt to the RB26 by the top bolts leaving the bottom unsecured. I am concerned this will allow movement between the motor and gearbox and the consequent problems? Anyone got anu suggestions? I forgot if you could tap the block or not for the bolt holes. Some of the other 26'ers will have to chime in on this. Quote Link to comment Share on other sites More sharing options...
fast-datsun Posted March 30, 2008 Share Posted March 30, 2008 it make no problems at all.. the gear box will stll be bolted on fine.... Quote Link to comment Share on other sites More sharing options...
Bob_H Posted March 30, 2008 Share Posted March 30, 2008 Stony ran low 11's with no issues using only the top 4 bolts. You won't have any issues. Quote Link to comment Share on other sites More sharing options...
stony Posted March 30, 2008 Share Posted March 30, 2008 I'm going into the low 9s and i anticipate no problems. It does add some rigidity to the block but from what i understand not having the 26 oil pan on it is no problem. Quote Link to comment Share on other sites More sharing options...
240Z_Master Posted March 30, 2008 Share Posted March 30, 2008 obviously just torque them to spec and you should be good Quote Link to comment Share on other sites More sharing options...
Mike Rowe Posted March 30, 2008 Author Share Posted March 30, 2008 thanks all for your comments, makes me feel a lot better about it. Cheers Quote Link to comment Share on other sites More sharing options...
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