Overdrive trans or change rearend/gears - The 1947 - Present Chevrolet & GMC Truck Message Board Network

cdowns · 01-25-2012, 11:45 AM

if you put a 308 rear in the truck will have to work very hard to move it's massiveness and probally result in worse gas mileage in the long run

mud.man.rj · 01-25-2012, 04:06 PM

Only problem if you regear is your still stuck with the old dated 3 speed that was never great in the first place.

fourspeedwagon · 01-25-2012, 04:35 PM

I don't do any severe duty type action with the 'burb. A t5 or nv4500 sounds good, anything else that I should be aware of in parts hunting for the swap?
Posted via Mobile Device

mud.man.rj · 01-25-2012, 04:37 PM

A friend of mine did the same swap and I think he had to change clutch disc for proper spline count and trans yoke, he did the T5 trans.

mud.man.rj · 01-25-2012, 04:39 PM

I think his trans tunnel hump was fine with the T5, larger for the Sm465 like in my truck.

01-25-2012, 11:45 AM	#1
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	Re: Overdrive trans or change rearend/gears if you put a 308 rear in the truck will have to work very hard to move it's massiveness and probally result in worse gas mileage in the long run __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

01-25-2012, 04:06 PM	#2
mud.man.rj Registered User Join Date: Dec 2011 Location: Creighton Sask. Canada Posts: 4,121	Re: Overdrive trans or change rearend/gears Only problem if you regear is your still stuck with the old dated 3 speed that was never great in the first place.

01-25-2012, 04:35 PM	#3
fourspeedwagon Registered User Join Date: Oct 2010 Location: Yakima Valley, Washington Posts: 580	Re: Overdrive trans or change rearend/gears I don't do any severe duty type action with the 'burb. A t5 or nv4500 sounds good, anything else that I should be aware of in parts hunting for the swap? Posted via Mobile Device

01-25-2012, 04:37 PM	#4
mud.man.rj Registered User Join Date: Dec 2011 Location: Creighton Sask. Canada Posts: 4,121	Re: Overdrive trans or change rearend/gears A friend of mine did the same swap and I think he had to change clutch disc for proper spline count and trans yoke, he did the T5 trans.

01-25-2012, 04:39 PM	#5
mud.man.rj Registered User Join Date: Dec 2011 Location: Creighton Sask. Canada Posts: 4,121	Re: Overdrive trans or change rearend/gears I think his trans tunnel hump was fine with the T5, larger for the Sm465 like in my truck.



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