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#1 |
Speed Limits...yeh right
Join Date: Jun 2006
Location: So Cal
Posts: 72
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5-SPEED transmission swap in a '72 4x4
Hi, I am new to this forum and yet I can see that there is a lot of experience among the members.
Has anyone replaced a 4-speed Muncie with a Tremmic 5-speed w/overdrive, or with any other 5-speed? Any help is greatly appreciated!!! |
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#2 |
Active Member
![]() Join Date: Dec 2005
Location: Bethlehem, PA
Posts: 346
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Re: 5-SPEED transmission swap in a '72 4x4
I'm in the midst of replacing the column shifted three-speed in my '67 with a new Tremec five-speed. I'll let you know how it goes as I finish it up.
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The older I get, the faster I was!! |
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#3 |
Special Order
![]() ![]() Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,859
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Re: 5-SPEED transmission swap in a '72 4x4
Not the Tremmac.But,the NV4500 is a common swap.You need either the later NP205 with the round mating surface(front)or a right-hand drop-out NP241 like what was in the last of the Blazers/Jimmys/Suburbans with solid front axles(pre-92).I believe t-case adaptors are made for other cases,but I wouldn`t bother with any other than the two I mentioned.
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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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#4 |
Speed Limits...yeh right
Join Date: Jun 2006
Location: So Cal
Posts: 72
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Re: 5-SPEED transmission swap in a '72 4x4
I spoke with the guys @ NV4500. This seems like a well thoughtout quality product.
Has anyone tried the NV4500 and are you happy with the results? Thanks for taking the time to answer |
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#5 |
Jamie Hyneman is my twin
![]() Join Date: Nov 2005
Location: La Junta, Colorado
Posts: 705
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Re: 5-SPEED transmission swap in a '72 4x4
One thing I know about that trans is that you can't haul a trailer in 5th gear. It will wear out in 500 mi. Owners manuals for any vehicle with a nv4500 will say it voids the warranty.
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Justin SOLD 1967 K10 Fleetside, 283, Front and Rear Posi SOLD Color Wiring Diagrams Now in High Resolution V8 and Cab and Cab and Chassis |
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#6 | |
Speed Limits...yeh right
Join Date: Jun 2006
Location: So Cal
Posts: 72
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Re: 5-SPEED transmission swap in a '72 4x4
Quote:
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1972 3/4 ton 4x4 LONG BED 1940 Chevy Pickup 1970 El Camino Pro Street 496BB w/NOS |
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#7 |
Special Order
![]() ![]() Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,859
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Re: 5-SPEED transmission swap in a '72 4x4
You shouldn`t tow in O/D with any light truck.
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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 |
Registered User
Join Date: Feb 2003
Location: The Rubber City
Posts: 5,498
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Re: 5-SPEED transmission swap in a '72 4x4
I am going to swap in a NP542GL transmission from a C60. It has 5 speeds, but 5th is direct. It is pretty much a bolt-in.
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1969 GMC K2500 ![]() 1996 Honda Accord 2007 Kawasaki KLR 650 |
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#9 |
Registered User
Join Date: Nov 2005
Location: WV
Posts: 227
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Re: 5-SPEED transmission swap in a '72 4x4
What about a 6 speed out of a latemodel F body into a 2wd?
Shane
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1993 K1500 350 5 speed ![]() 1985 K10 Silverado Vortec 406 5 speed (in body shop) "I been drivin' this '85 pickup truck Them buddies of mine call it a bucket of rust She's a little beat up but she still runs like the wind Yeah, kinda like me I been banged and bruisedBeen around the block a time or two But I'm runnin' like new goin' places I never been No, I ain't broke I'm just broken in" 1963 Dodge Townwagon(its amazng what 30 years and zero miles will do to a vehicle ![]() Member#20327 |
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#10 |
Registered User
Join Date: Sep 2002
Location: Liberty, Mississippi
Posts: 671
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Re: 5-SPEED transmission swap in a '72 4x4
I swapped in a nv4500 in place of a sm465 4 spd in my 4x4. The 81 up 208c case is a direct bolt on.
1969 GMC, doesn't that trans have the bigger input shaft? Or was that just the earlier 2T 5 spds? Virgil |
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#11 | |
Registered User
Join Date: Feb 2003
Location: The Rubber City
Posts: 5,498
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Re: 5-SPEED transmission swap in a '72 4x4
Quote:
Mine has the BIG input shaft, well bigger than my SM465's anyway. But I got the tranny complete with clutch, pressure plate, flywheel, bellhousing, and part of the clutch linkage, so it bolts up to the crank just like the stock stuff did. It was originally behind a 427 tall deck which has neutral balance just like the SBC, so i am good as far as that goes. I am going to use a divorced NP201 from an old International behind this beast, which is huge itself. Not too worried about breakage ![]() EDIT: see my sig? thats the new shift pattern...will take a little getting used to.
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1969 GMC K2500 ![]() 1996 Honda Accord 2007 Kawasaki KLR 650 Last edited by 1969 GMC; 06-25-2006 at 06:39 PM. |
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#12 | |
Registered User
![]() Join Date: Jan 2005
Location: Eastern Nebraska
Posts: 611
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Re: 5-SPEED transmission swap in a '72 4x4
Quote:
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'72 Chevy K-20 Crate 350, SM465, 4.10's |
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#13 | |
Registered User
Join Date: Apr 2003
Location: Central PA....In the Berg of Nisbet
Posts: 790
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Re: 5-SPEED transmission swap in a '72 4x4
Quote:
Main problem with the NV, is unlike an Auto which knows when to downshift, the guy in the seat doesn't think that way and problems start. Most of the NV problems started because of an engine called a 5.9 Cummins. You have so much torque it is possible to pull hills in OD which a huge load, the engine has so much low end it wouldn't quit, and common sense tells you that a rinky dink pickup tranny in OD behind that engine which has a much larger transmission behind it in Commercial applications is gonna be the thing that will break. Anyway, I don't think an NV would mind running in OD towing down the fairly flat 4 lane black top...........Its the instances I mentioned above where they flake out.
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'72 K-20 EFI'ed 250 Inline/4spd stake body, Farm Truck '71 C-20 Cummins Diesel Powered, In storage thanks to $5.00 diesel! '69 3500 GMC 305V-6/4spd, Still under reconstruction.......... Inlines Rule! 6 soldiers standing is better than 8 laying down!!!!!!!! |
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#14 |
Special Order
![]() ![]() Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,859
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Re: 5-SPEED transmission swap in a '72 4x4
I`ve gotten around 100,000 miles from NV4500s in two different`K3500s w/6.5TD.I ignored the "no tow in o/d" warning.The NV4500 is hardly a rinky dink trans for a light truck.They can take torque in the 500+ range w/no problems.Anything more than that,you`re on your own with any light truck tranny.
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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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