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Driveway Dreams · 04-09-2010, 11:46 PM

Currently I have the wonderful (for a 4x4

) SM465 behind a 350 that I know is sloppy. When I have it in neutral or have the clutch in, I can rev the motor nicely. I can blip it to over 4g with no issue. But while driving I can not, in any gear, get it to rev past about 3g. I am replacing the motor soon. And have the intent to swap to an NV3500 tranny in due time. But I wonder why the RPM differences?
Is it the motor?
Is it just the gearing of the dang tranny?

04-09-2010, 11:46 PM	#1
Driveway Dreams I have car A.D.D. Join Date: Feb 2009 Location: Greeley, Northern Colorado Posts: 4,147	SM465 behind 350 RPM ?? Currently I have the wonderful (for a 4x4 ) SM465 behind a 350 that I know is sloppy. When I have it in neutral or have the clutch in, I can rev the motor nicely. I can blip it to over 4g with no issue. But while driving I can not, in any gear, get it to rev past about 3g. I am replacing the motor soon. And have the intent to swap to an NV3500 tranny in due time. But I wonder why the RPM differences? Is it the motor? Is it just the gearing of the dang tranny? __________________ -Gerald Building vehicles in memory of the first "car guy" I ever knew, my Grandpa. Bob Dunham 1935-2009. Rest in peace. 61 GMC Suburban SOLD The 86 build thread SOLD Are you a Colorado member?Click here.