4 Speeds and Gear Ratio's - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Hlindeen · 08-25-2011, 08:26 PM

I have been hamering around the idea of two choices.

One - Put a 4 speed in with a differant ring and pinion?
Two - Put in a 5 speed with differant ring and pinion or just differant axles.

Not for sure what i want to do just bought a brand new NP203 transfercase for my 350 turbo trans and new adapter it costed me around 1100 for it. But now wondering about what to do with putting a older redone 4 speed in or go with putting in a 5 speed, i have 4.56 gear ratio and a 355 motor so let me know i need some help with this one thanks!

b454rat · 08-25-2011, 10:00 PM

I'd go for the 5-speed.

67_SS396 · 08-25-2011, 11:36 PM

What is the truck primarily used for? IMO, I would go 5spd and keep the 4.56. I love my 4spd, doubler and 5.13's, but it doesn't get driven on the street much and not far when it does.
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Hlindeen · 09-03-2011, 10:37 AM

Its the only pickup i have at the moment. And i dont drive it to far ive only put 6000 miles on it and november 24th of this year will be the second year ive had it.

1malo68 · 09-06-2011, 04:30 AM

If you want to see where you'll be as far as Gear ratios / RPMs, check it out on this site http://www.grimmjeeper.com/gears.html You can answer all of you questions here

08-25-2011, 08:26 PM	#1
Hlindeen Registered User Join Date: Jan 2011 Location: Marysville, Kansas Posts: 82	4 Speeds and Gear Ratio's I have been hamering around the idea of two choices. One - Put a 4 speed in with a differant ring and pinion? Two - Put in a 5 speed with differant ring and pinion or just differant axles. Not for sure what i want to do just bought a brand new NP203 transfercase for my 350 turbo trans and new adapter it costed me around 1100 for it. But now wondering about what to do with putting a older redone 4 speed in or go with putting in a 5 speed, i have 4.56 gear ratio and a 355 motor so let me know i need some help with this one thanks! __________________ 67 Chevrolet K20 72 Chevrolet K20 13 2500HD Chevrolet Duramax 4x4 LTZ Z71

08-25-2011, 10:00 PM	#2
b454rat Senior Member Join Date: May 2004 Location: Binghamton, NY Posts: 3,469	Re: 4 Speeds and Gear Ratio's I'd go for the 5-speed. __________________ 2000 GMC CCSB 454/4L80 6” lift SAS 1999 Chevy CCSB 454/NV4500 4” SAS 1999 GMC Yukon 350/4L60 6" SAS

08-25-2011, 11:36 PM	#3
67_SS396 Registered User Join Date: Mar 2000 Location: Blue Ridge, Tx Posts: 1,172	Re: 4 Speeds and Gear Ratio's What is the truck primarily used for? IMO, I would go 5spd and keep the 4.56. I love my 4spd, doubler and 5.13's, but it doesn't get driven on the street much and not far when it does. Posted via Mobile Device __________________ Fawker Fab three seater rock crawler buggy 498 BBC/SM465/203/205 doubler, propane, 5.13's, 42" PB Rockers '66 C10 - The new hot rod '77 3+3 Dually - 12 valve 4wd conversion tow rig project '28 Ford 2 door sedan street rod RevLimit Offroad "Hang on beer, we can do this."

09-03-2011, 10:37 AM	#4
Hlindeen Registered User Join Date: Jan 2011 Location: Marysville, Kansas Posts: 82	Re: 4 Speeds and Gear Ratio's Its the only pickup i have at the moment. And i dont drive it to far ive only put 6000 miles on it and november 24th of this year will be the second year ive had it. __________________ 67 Chevrolet K20 72 Chevrolet K20 13 2500HD Chevrolet Duramax 4x4 LTZ Z71

09-06-2011, 04:30 AM	#5
1malo68 Registered User Join Date: Aug 2010 Location: Lost Wages, NV Posts: 201	Re: 4 Speeds and Gear Ratio's If you want to see where you'll be as far as Gear ratios / RPMs, check it out on this site http://www.grimmjeeper.com/gears.html You can answer all of you questions here



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