What is a good and durable overdrive transmission to use behind a bigblock chevy? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

HeavyHauler · 06-23-2019, 02:28 PM

I am wanting to build a bigblock Chevy engine that will be about 600HP and the same amout if not more torque. What overdrive transmission will be able to handle that type of power?

KQQL IT · 06-23-2019, 02:30 PM

Gear vendors

Mike C · 06-23-2019, 06:38 PM

None of them stock. 4L80E is where I would be spending my money most likely. The TH400 with the gear vendors is another option and they say the TH700 can be built to take that power, but I am not a fan of the gear split on the 700. I am going to put a built Extreme Automatics in my 69 short step with the 427. But I am more like 450hp not 600.

morepwr · 06-23-2019, 07:03 PM

4L80 would the choice if you don't want a Gear Vendor behind a Turbo 400.

greasemonkey · 06-23-2019, 07:05 PM

Automatic or manual? The Tremec TKO can be bought rated for 600 lb ft, but that's a manual.

**special-K** · 06-24-2019, 07:49 AM

4L80E for overdrive automatic. A great strong reliable transmission.

HeavyHauler · 06-24-2019, 10:24 AM

I would definitely want automatic and it sounds like 4L80E would be the trans to get. I dont know anything about gear vendors and I dont want to cut up my truck trying to make something fit.

**HO455** · 06-24-2019, 10:58 AM

There shouldn't be any cutting of the truck to install the gear vendors unit. Other than the driveshaft. They are pretty rugged pieces I know of several low 10/high 9 second cars that run them without issue. Some of the differences between the two come down to the 4L80 will require an aftermarket computer to operate which gives you laptop adjustment capability. The 4L80 will also have a lock up convertor, but with the engine your installing I would assume you will forgo that for a high stall convertor. A T400 with gear vendors will be cheaper to repair down the road. Gear Vendors has been around since the 70's or longer. Here is a link to more information.

Happy Shopping!

http://67-72chevytrucks.com/vboard/s...d.php?t=764137

mike16 · 06-24-2019, 10:42 PM

what about a np4500?

06-23-2019, 02:28 PM	#1
HeavyHauler Registered User Join Date: Nov 2011 Location: USA Posts: 409	What is a good and durable overdrive transmission to use behind a bigblock chevy? I am wanting to build a bigblock Chevy engine that will be about 600HP and the same amout if not more torque. What overdrive transmission will be able to handle that type of power?

06-23-2019, 02:30 PM	#2
KQQL IT At the body shop. Join Date: Aug 2009 Location: Land of fruits and nuts. Posts: 5,254	Re: What is a good and durable overdrive transmission to use behind a bigblock chevy? Gear vendors __________________ " That didnt make it any newer " " Dont antique the equipment "

06-23-2019, 06:38 PM	#3
Mike C Registered User Join Date: Dec 1999 Location: Austin, TX, USA Posts: 7,727	Re: What is a good and durable overdrive transmission to use behind a bigblock chevy? None of them stock. 4L80E is where I would be spending my money most likely. The TH400 with the gear vendors is another option and they say the TH700 can be built to take that power, but I am not a fan of the gear split on the 700. I am going to put a built Extreme Automatics in my 69 short step with the 427. But I am more like 450hp not 600. __________________ 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

06-23-2019, 07:03 PM	#4
morepwr Registered User Join Date: Jun 2018 Location: Ventura, Ca Posts: 206	Re: What is a good and durable overdrive transmission to use behind a bigblock chevy? 4L80 would the choice if you don't want a Gear Vendor behind a Turbo 400. __________________

06-23-2019, 07:05 PM	#5
greasemonkey Registered User Join Date: Dec 2001 Location: Pace, FL Posts: 2,155	Re: What is a good and durable overdrive transmission to use behind a bigblock chevy? Automatic or manual? The Tremec TKO can be bought rated for 600 lb ft, but that's a manual. __________________ 1942 Master Deluxe 1969 C/10 1985 Blazer CUCV 1987 Jimmy 2004 Tahoe 2005 Silverado 1500 2005 Silverado 3500

06-24-2019, 07:49 AM	#6
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,851	Re: What is a good and durable overdrive transmission to use behind a bigblock chevy? 4L80E for overdrive automatic. A great strong reliable transmission. __________________ "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 ~

06-24-2019, 10:24 AM	#7
HeavyHauler Registered User Join Date: Nov 2011 Location: USA Posts: 409	Re: What is a good and durable overdrive transmission to use behind a bigblock chevy? I would definitely want automatic and it sounds like 4L80E would be the trans to get. I dont know anything about gear vendors and I dont want to cut up my truck trying to make something fit.

06-24-2019, 10:58 AM	#8
HO455 Post Whore Join Date: Feb 2016 Location: Portland Oregon Posts: 11,350	Re: What is a good and durable overdrive transmission to use behind a bigblock chevy? There shouldn't be any cutting of the truck to install the gear vendors unit. Other than the driveshaft. They are pretty rugged pieces I know of several low 10/high 9 second cars that run them without issue. Some of the differences between the two come down to the 4L80 will require an aftermarket computer to operate which gives you laptop adjustment capability. The 4L80 will also have a lock up convertor, but with the engine your installing I would assume you will forgo that for a high stall convertor. A T400 with gear vendors will be cheaper to repair down the road. Gear Vendors has been around since the 70's or longer. Here is a link to more information. Happy Shopping! http://67-72chevytrucks.com/vboard/s...d.php?t=764137 __________________ Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help. RIP Bob Parks. 1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo If it breaks I didn't want it in the first place The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377

06-24-2019, 10:42 PM	#9
mike16 Registered User Join Date: Dec 2009 Location: bisbee, arizona Posts: 1,529	Re: What is a good and durable overdrive transmission to use behind a bigblock chevy? what about a np4500?



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