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#1 |
Registered User
Join Date: Jun 2006
Location: Utah
Posts: 1,562
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Gearing options needed
So, I'm really trying to decide how I want to gear my beast. Currently, it has a 4 speed, NP205 (I think), 4:10 rear (not orig), 4:56 front (orig). I am planning on going with a 4" lift and 35's.
So, I'm going to stick with the 4:10 ratio but I'm not sure about the tranny. I've thought about swapping in a NV4500, or another option may just add a GV Overdrive unit. It seems like the GV option would be easier, and would probably be about the same costs but I wanted to see if you all had an opinion. |
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#2 |
Windy Corner of a Dirty Street
Join Date: Jun 2003
Location: Pueblo West, Colorado
Posts: 2,926
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Re: Gearing options needed
4:56 with a NV4500 on 35-37’s is a great combination. GV has great products but they tend to work better on 2wd trucks more than 4wd. That is just me .02 cents.
__________________
Current vehicle collection: 1978 Chevrolet K10, 8.1L, NV4500, NP205 1989 Chevrolet Suburban, 8.1L, NV4500, NP241 1993 Chevrolet C1500 Sportside, TBI 7.4L, 4L60E 2001 Chevrolet K2500HD, Ext Cab, SWB, 8.1L, ZF 6 speed 2014 Chevrolet Impala LTZ 3.6L Vortec 8.1L because life is too short to tolerate underpowered vehicles
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#3 |
Registered User
Join Date: Jun 2006
Location: Utah
Posts: 1,562
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Re: Gearing options needed
Well, after seeing what you've accomplished I would gladly take your two cents
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#4 |
Registered User
Join Date: Dec 1999
Location: Austin, TX, USA
Posts: 7,738
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Re: Gearing options needed
I don't have any issues keeping up with traffic with 4.10 and 35's with my SM465. It runs about 2800-2900 at 70 mph, which is not too bad with a carburetor on a small block. Certainly not bad enough for a $3-$4 THOUSAND dollar investment unless you were planning a bunch of high speed cross country trips. Put it together and drive it before making that decision. Then see what adding 37" tires would do.
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44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax |
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#5 |
Registered User
Join Date: Jun 2006
Location: Utah
Posts: 1,562
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Re: Gearing options needed
Thanks Mike...I like your logic. I think I'll just find me a 4.10 front to match and get it back together as is.
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#6 |
Registered User
Join Date: Jul 2011
Location: Marietta, Ga
Posts: 32
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Re: Gearing options needed
seems like adding the GV unit would make for a really steep rear drive shaft angle. does anyone know how much length it adds to the transfer case? the GV website doesn't appear to give the dimensions of the unit. ..just pictures.
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#7 |
Registered User
Join Date: Jan 2009
Location: Louisville,Ky
Posts: 5,811
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Re: Gearing options needed
Why the gear vendors are you trying to make it easier on gas on ?
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#8 |
Registered User
Join Date: Dec 2010
Location: freeburg, illinois
Posts: 885
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Re: Gearing options needed
Why not some extreme low range like a StaK transfer case and a gear vendors underdrive? lol real rock crawling ratios and also good for no gas mileage =-p
__________________
1987 Chevy V30 - http://67-72chevytrucks.com/vboard/s...d.php?t=573854 1988 IROC-Z Camaro - 305/T5 T-Top 1989 GMC V35 - Marbolo Express http://67-72chevytrucks.com/vboard/s...d.php?t=596850 1991 V2500 Suburban Silverado - Sold 1991 V2500 Suburban Scottsdale - Big Nasty http://67-72chevytrucks.com/vboard/s...d.php?t=497423 2001 Ram 3500 5.9 H.O NV56 EC DRW - Sold 2003 1500 Silverado 2004 Ram 3500 5.9 H.O NV56 CC DRW - Sold 2005 Silverado 2500HD 6.6/ZF6 CC LWB |
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#9 |
Registered User
Join Date: Jun 2006
Location: Utah
Posts: 1,562
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Re: Gearing options needed
I was really wanting to get an overdrive for the amount of freeway cruising I will be doing. I really don't want to go through all the trouble of doing the tranny swap right now. I think a GV unit is really out of the question for this build.
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#10 |
Senior Member
![]() Join Date: Mar 2003
Location: Colfax-California
Posts: 8,713
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Re: Gearing options needed
If you really want to help your SM465, jump over to the Advance Adapter website and take a look at their overdrive unit...Ranger. It bolts in front of your trans, it is 7.5'' long. It essentially gives you an 8 speed trans and with the t-case 16 speeds. If you are towing in any kind of mountainous situations 2nd and 3rd gear overdrive are awesome. With a 4'' lift it will also help your front driveline angle
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#11 | |
Registered User
Join Date: Jun 2006
Location: Utah
Posts: 1,562
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Re: Gearing options needed
Quote:
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#12 |
Registered User
Join Date: Dec 2010
Location: freeburg, illinois
Posts: 885
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Re: Gearing options needed
http://www.fordification.com/tech/torque-splitter.htm not in a chevy but might help couldn't find much else
__________________
1987 Chevy V30 - http://67-72chevytrucks.com/vboard/s...d.php?t=573854 1988 IROC-Z Camaro - 305/T5 T-Top 1989 GMC V35 - Marbolo Express http://67-72chevytrucks.com/vboard/s...d.php?t=596850 1991 V2500 Suburban Silverado - Sold 1991 V2500 Suburban Scottsdale - Big Nasty http://67-72chevytrucks.com/vboard/s...d.php?t=497423 2001 Ram 3500 5.9 H.O NV56 EC DRW - Sold 2003 1500 Silverado 2004 Ram 3500 5.9 H.O NV56 CC DRW - Sold 2005 Silverado 2500HD 6.6/ZF6 CC LWB |
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#13 |
Registered User
Join Date: Apr 2011
Location: chillicothe, ohio
Posts: 11
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Re: Gearing options needed
I ordered a Ranger overdrive last week for a 4wheel drive with a Sm 465 and 205 . My measurements for the transfer case shifter may hit the edge of a bench seat. I plan to install buckets. The people at Advance seem like good people. This truck is a class project so it may be a few months before it is together.
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#14 |
Registered User
Join Date: Mar 2012
Location: edgartown mass
Posts: 852
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Re: Gearing options needed
what about a hole aux trans? one like a spicer?? i think it is a 3051A i may be wrong on the name but it was used in mid rang trucks. gives you a 2;1 under drive 1;1 and a .78 over same as the gear vendors and the ranger spliter. 2 wheel drive use only tho un less you fit a divored tcase in there. seen some of the diesel guys do it and they love it. turn a 4 speed into a 12 speed. and yes it will handle all of the power a gasser can make. think they are rated for 1000 lbs tq. there are bigger ones for more power. would work great in a 4 door long bed more then enough room but has been done on a long bed reg cab. later, mike
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#15 |
Registered User
Join Date: Aug 2010
Location: Pikeville NC
Posts: 239
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Re: Gearing options needed
my 85 k20 has 4.11 gears with 37s and a 400 trans i can smoke the 37s and at 60 i am at 2250 rpm 350 roller engine
have a question though I have a 83 k10 with the 4 speed well really 3 speed with granny gear but the granny gear does not want to stay in gear hard to get in gear and will pop out any suggestions |
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#16 | |
Registered User
![]() Join Date: Feb 2007
Location: Star Valley, WY
Posts: 2,038
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Re: Gearing options needed
Quote:
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Steve 1971 GMC Longbox. Full Roller Stroker 489 w/ FiTech EFI, Chris Straub Cam/NV4500/205/D60/14B w. Grizzly Locker and 4.11's. 2" Lift on 33's |
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