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#1 |
Registered User
Join Date: Apr 2014
Location: asheville nc
Posts: 151
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better option than SM465 manual trans?
currently have a 305/SM465 manual trans combo and the gear ratios in the trans are driving me nuts. I was wondering what is a better option for me for a daily driver:
NV4500- are the ratios better than the SM465 or are they the same with just an OD added? TKO trans T56 SM465- gear vendor OD |
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#2 |
Registered User
Join Date: May 2009
Location: Motor City
Posts: 9,193
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Re: better option than SM465 manual trans?
New Process A833 is a nice option, if you can find one. 3rd gear is 1:1 and 4th gear is .73:1.
Mine was a daily driver for 30 years and over 200,000 miles. K
__________________
Chevrolet Flint Assembly 1979-1986 GM Full Size Truck Engineering 1986 - 2019 Intro from an Old Assembly Guy: http://67-72chevytrucks.com/vboard/s...d.php?t=342926 My Pontiac story: http://forums.maxperformanceinc.com/...d.php?t=560524 Chevelle intro: http://www.superchevy.com/features/s...hevy-chevelle/ |
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#3 |
Registered User
Join Date: Apr 2014
Location: asheville nc
Posts: 151
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Re: better option than SM465 manual trans?
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#4 |
Registered User
Join Date: Sep 2009
Location: Weare,NH
Posts: 1,592
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Re: better option than SM465 manual trans?
How much abuse can a A833 take? I still have mine sitting in a crate in pieces, and I'm running a stock 5.3L currently. My other option for a cheap transmission is the NV3500, and those don't have a great reputation. Even GM didn't put them behind stock 5.3L's.
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#5 |
Registered User
Join Date: Mar 2016
Location: N/A
Posts: 146
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Re: better option than SM465 manual trans?
What's driving you crazy about the ratios in the SM465?
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#6 |
Registered User
Join Date: Apr 2014
Location: asheville nc
Posts: 151
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Re: better option than SM465 manual trans?
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#7 |
Registered User
Join Date: Mar 2016
Location: N/A
Posts: 146
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Re: better option than SM465 manual trans?
Dude... first gear in that tranny is "granny gear," suitable for starting out under heavy load, or towing, or extreme low-speed applications. Treat the transmission as a three-speed, and start out in second.
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#8 | |
Registered User
Join Date: Apr 2014
Location: asheville nc
Posts: 151
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Re: better option than SM465 manual trans?
Quote:
I start in 1 always, and when shifting into 2 the gap is so big ratio wise it just lugs and takes forever to go anywhere. flat roads it's fine. starting on a hill or even going up a long steep hill having to shift from 3 down to 2 I'm just killing mpg. I don't usually care about mpg but I drive 60 miles a day and I'm currently getting 10-11mpg with the 305/sm465 |
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#9 | |
Registered User
Join Date: Mar 2016
Location: N/A
Posts: 146
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Re: better option than SM465 manual trans?
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#10 |
Registered User
Join Date: Jul 2007
Location: Tucson, AZ
Posts: 3,188
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Re: better option than SM465 manual trans?
At 60 miles per day just get an economy car and park or sell the truck. My old 2002 Cavalier has a hill holder function, so no worry on starting on a hill (or stopping on a hill.) I think most modern cars have this feature. The only problem with late model cars is that there is no room to work on then under the hood and some things are nearly impossible for the DIYer (like heater core replacement.)
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#11 | |
Registered User
Join Date: Apr 2014
Location: asheville nc
Posts: 151
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Re: better option than SM465 manual trans?
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#12 | |
Registered User
Join Date: Apr 2016
Location: Bosque County, TX
Posts: 40
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Re: better option than SM465 manual trans?
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#13 |
driving is in my blood
Join Date: Dec 1999
Location: Mesa AZ
Posts: 5,720
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Re: better option than SM465 manual trans?
Yeah I really hope you aren't actually using the granny first gear to start out in?
The gear spread from 2-4th is pretty normal. Only reason to get rid of the sm465 is because it shifts like crap and weighs a ton, or you want an overdrive.
__________________
-78 c10 short/step: 388cid, M20, 5/5 drop, lots more. Playtoy and first vehicle. -98 c1500 x-cab: 5.7L, 17" rims, 5/6 drop, flowmaster, helper bags,NBS rear disk brakes. -02 Suburban 4x4: leveled front -CBR600F4i, CBR600RR, CBR1000RR, and standup skis DISCLAIMER: I cant spell for the life of me. |
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#14 |
Registered User
Join Date: Sep 2009
Location: Weare,NH
Posts: 1,592
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Re: better option than SM465 manual trans?
I want to get rid of the SM465 as first, no overdrive; and since I'm not using it for heavy towing anymore I don't need the granny gear.
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#15 | |
Registered User
Join Date: May 2011
Location: Goliad, TX
Posts: 672
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Re: better option than SM465 manual trans?
The ratios on an NV4500 are the same as an SM465 but with an OD added. If you want a closer ratio manual transmission with the durability of the SM465, then you might consider a NV5600. This particular tranny has gears that are closer apart and more appropriate for towing or diesel application. I have this transmission in my 1990 Suburban and couldn't be happier.
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__________________
1990 ¾ ton 4x4 Chevy Suburban -Cummins Diesel - 12 valve - factory rebuilt -6 speed bullet proof manual transmission - NV5600 -Gear Vendors Overdrive - HX35 Holset Turbo -NP205 iron transfer case -3.73 gears -2" Lift |
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#16 |
Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,594
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Re: better option than SM465 manual trans?
First thing to do is optimize what you got!
You've likely got 20 to 30 horses hiding in your motor. What's your timing curve like? |
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#17 |
Registered User
Join Date: Mar 2016
Location: N/A
Posts: 146
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Re: better option than SM465 manual trans?
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#18 |
Registered User
Join Date: Apr 2014
Location: asheville nc
Posts: 151
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Re: better option than SM465 manual trans?
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#19 |
Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,594
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Re: better option than SM465 manual trans?
I think you two should wake up!!
He replaced his pump in his other thread and you responded to it Oberon! So back to the oringal question--- Whats's your timing curve like? |
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#20 |
Registered User
Join Date: Mar 2016
Location: N/A
Posts: 146
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Re: better option than SM465 manual trans?
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#21 |
Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,594
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Re: better option than SM465 manual trans?
http://67-72chevytrucks.com/vboard/s...d.php?t=703507
Post 15. Replaced fuel pump. 20 bucks. Likely pump wasn't a problem anyway. |
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#22 |
Registered User
Join Date: Mar 2016
Location: N/A
Posts: 146
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Re: better option than SM465 manual trans?
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#23 |
driving is in my blood
Join Date: Dec 1999
Location: Mesa AZ
Posts: 5,720
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Re: better option than SM465 manual trans?
I've never gotten more then 10mpg with various engine/trans combos in 73-87's and non-overdrives, and I've run 4 different transmissions and 5 engine combo's in these things. With overdrive you can see 15mpg sure, but the gear spread isn't what's causing the mileage loss. Putting a bigger, excellent condition engine might help but highly doubtful.
__________________
-78 c10 short/step: 388cid, M20, 5/5 drop, lots more. Playtoy and first vehicle. -98 c1500 x-cab: 5.7L, 17" rims, 5/6 drop, flowmaster, helper bags,NBS rear disk brakes. -02 Suburban 4x4: leveled front -CBR600F4i, CBR600RR, CBR1000RR, and standup skis DISCLAIMER: I cant spell for the life of me. |
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