The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Who has a newer transmission on their 305 V6

slorio · 11-12-2015, 09:56 AM

WC:
I have the 3 speed with overdrive (T85N) behind my 351 V6. Overdrive drops RPM's 30%. It was a bolt in swap in place of my original 3 speed (SM318), but you would have to do some drive shaft work to replace your original 4 speed. See the current discussion on overdrive 3 speeds here:

http://67-72chevytrucks.com/vboard/s...d.php?t=313886

Regards,
Steve
New Orleans

11-12-2015, 09:56 AM	#6
slorio Registered User Join Date: Sep 2006 Location: Louisiana Posts: 375	Re: Who has a newer transmission on their 305 V6 WC: I have the 3 speed with overdrive (T85N) behind my 351 V6. Overdrive drops RPM's 30%. It was a bolt in swap in place of my original 3 speed (SM318), but you would have to do some drive shaft work to replace your original 4 speed. See the current discussion on overdrive 3 speeds here: http://67-72chevytrucks.com/vboard/s...d.php?t=313886 Regards, Steve New Orleans