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#1 |
Cochino_Racing_909
Join Date: Oct 2006
Location: California
Posts: 280
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1972 Jimmy
Hey guys I am going to get back on working on my Jimmy.
I need some help with a few things First off I have 35 inch swamppers need the correct gear ratio as I am going to need to change gearing from stock. 2nd. I have cross over steering I want to put on that has been sitting on my shelf for a couple years. 3rd I would like to put hydro assist and ideas or places who are more affordable than psc? ![]() |
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#2 |
Cochino_Racing_909
Join Date: Oct 2006
Location: California
Posts: 280
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Re: 1972 Jimmy
Where are all my 4x4. Guru's. At?
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#3 |
Registered User
Join Date: Nov 2013
Location: Suffield CT
Posts: 55
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Re: 1972 Jimmy
1 What gear ratio do you want just back to like stock rpm or are you going to wheel and want that low end torque
3 for hydro boost brakes go to the junk yard and pull one off a Chevy one ton truck or van |
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#4 |
Registered User
Join Date: Sep 2013
Location: Bangor pa
Posts: 1,223
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Re: 1972 Jimmy
What trans do you have? I have 35s and 4.10 with the sm465 and it is just about perfect. If you plan on putting in a overdrive trans later or don't run on the highway a lot 4.56 would be good.
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72 3/4 ton blazer. 5 inch lift on 35 inch tires. 355 corvette engine with crane roller rockers, rv cam, edelbrock carb and intake with one inch spacer. Thrush Headers with flowmaster 40 duels. 4speed sm465 manual. 4 wheel disk brakes with Inboarded rear shock prerunner style mounts and shocks. |
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#5 |
Cochino_Racing_909
Join Date: Oct 2006
Location: California
Posts: 280
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Re: 1972 Jimmy
I have a turbo 400...
I am gonna put ARB. OR ELOCKER ...not sure which set up yet And I am not sure on 4:56 or 4:88 And the hydro assist I want for steering |
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#6 |
Registered User
Join Date: Sep 2013
Location: Bangor pa
Posts: 1,223
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Re: 1972 Jimmy
With the th400 go with 4.56. There is a little slippage and parasitic power loss in that trans and the extra gearing will help. If you don't plan on bigger tires that ought to be perfect. 4.88 you'd be screaming down the highway st 3400 rpm at 60. At 60 with 4.10 I'm right around 24-2600 rpm. But I have the granny low gear so I can use a higher gear for highway and still be good offroad.
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72 3/4 ton blazer. 5 inch lift on 35 inch tires. 355 corvette engine with crane roller rockers, rv cam, edelbrock carb and intake with one inch spacer. Thrush Headers with flowmaster 40 duels. 4speed sm465 manual. 4 wheel disk brakes with Inboarded rear shock prerunner style mounts and shocks. |
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#7 |
Special Order
![]() ![]() Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,859
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Re: 1972 Jimmy
Do you plan on taller tires to fit the lift? I'd consider that before deciding on ratio. My rule of thumb with 35s is 410 with O/D and 4.56 w/o. A lot depends on engine torque,too,but with or without O/D and gears in the 4.10-4.56 range is what you want. Tell us about your engine
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"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ |
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#8 |
Cochino_Racing_909
Join Date: Oct 2006
Location: California
Posts: 280
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Re: 1972 Jimmy
Engine is 383 Stroker. Turbo 400 trans , Np205 transfer case. Electric fans
Going to run a semi float 14 bolt in the rear mainly because of the 6 lug. Dana 44 in the rear. 35 inch super swamper Tsl Sx. That's as big as I am gonna go on tire. Not to sure if I am going to go with ARB OR E LOCKER. Also I am going to buy hydro assist steering. |
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#9 |
Cochino_Racing_909
Join Date: Oct 2006
Location: California
Posts: 280
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Re: 1972 Jimmy
Ttt
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#10 |
Registered User
Join Date: May 2010
Location: Edmonton, Alberta
Posts: 3,848
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Re: 1972 Jimmy
I can't help you with your questions as I know nothing about 4X4's, but I really like your truck. It looks to be a real nice survivor.
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--------------------------------------------------------------- Jason. 68’ GMC shortbox https://67-72chevytrucks.com/vboard/...d.php?t=794201 72' 2WD Blazer http://67-72chevytrucks.com/vboard/s...d.php?t=425385 67' LongBox C-10 http://67-72chevytrucks.com/vboard/s...d.php?t=691845 InstaGram ybnorml67 |
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