What to use? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

justjimsgirl · 05-13-2003, 10:18 AM

I've been told so many thing's. What transmision should I use? 402 BB W/ Offenhauser tunnel ram W/dual Holley 550 D-pumpers. Rearend is 12 bolt with 4-11 gear's. I have a turbo 400, but I think It need's another gear? maybe a 700R4?

case_bt · 05-13-2003, 10:22 AM

to make it more streetable I'd go with the 700r4

justjimsgirl · 05-13-2003, 10:29 AM

Thank's, should I change to a bigger cam also? (to help the tunnel ram work to peak performance), That's what I was told.

doug72 · 05-13-2003, 10:35 AM

I am going to use a 700R4 in mine, just because I have it and it is already built. If I was starting again, I would use a 2004R from Phoenix transmissions. They hold more HP than the 700R4 and have a better shift pattern. I have one in my Rs/SS 69 Camaro. I am going to use one behind my LS6 454.

Doug

neonlarry · 05-13-2003, 11:11 AM

That sounds like a pretty healthy engine, and either a 700r4 or a 2004r will take a bit of work to handle that much power. I would go with a 2004r though if you want overdrive. What cam does it have in it now? And what sompression ratio? That would help with deciding what cam would be best to use in it.

gr8scott51 · 05-13-2003, 11:24 AM

The Copperhead project on Trucks! TV show used a 400 behind the 572. The 400 is much stronger. He added an aftermarket overdrive to the tailshaft on the 400. That essentially gave him 6 gears. That should be plenty. Good luck, Scott

crazy longhorn · 05-13-2003, 08:22 PM

I 2nd that......400 turbo, with a gearvendors OD unit on the back would be the ticket to many happy miles of abuse.....er I mean fun

crazyL

Longhorn Man · 05-13-2003, 09:03 PM

And here is the link to there site. http://www.gearvendors.com/commercial.html
If you have the cash, the gear vendors (or another brand) is the way to go.

05-13-2003, 10:18 AM	#1
justjimsgirl Registered User Join Date: May 2003 Location: Co, Springs Co. Posts: 17	What to use? I've been told so many thing's. What transmision should I use? 402 BB W/ Offenhauser tunnel ram W/dual Holley 550 D-pumpers. Rearend is 12 bolt with 4-11 gear's. I have a turbo 400, but I think It need's another gear? maybe a 700R4?

05-13-2003, 10:29 AM	#3
justjimsgirl Registered User Join Date: May 2003 Location: Co, Springs Co. Posts: 17	Thank's, should I change to a bigger cam also? (to help the tunnel ram work to peak performance), That's what I was told. __________________ Trying to make a buck, so I can finish my 72 truck. 09/11/72, than and now!

05-13-2003, 11:11 AM	#5
neonlarry Registered User Join Date: Feb 2002 Location: Vacaville, CA Posts: 2,745	That sounds like a pretty healthy engine, and either a 700r4 or a 2004r will take a bit of work to handle that much power. I would go with a 2004r though if you want overdrive. What cam does it have in it now? And what sompression ratio? That would help with deciding what cam would be best to use in it. __________________ 70 C/10 Light Red 350/TH350, HEI, Duals w/40 series Flows, 91 seat, LED taillights 99 Pontiac S/C GTP, SLP Ram Air hood, GMPP Konis & springs 95 Neon ACR, MP PCM, AFX UDP, 3.0 CAI

05-13-2003, 11:24 AM	#6
gr8scott51 Registered User Join Date: Mar 2003 Location: Bremerton, WA Posts: 1,839	The Copperhead project on Trucks! TV show used a 400 behind the 572. The 400 is much stronger. He added an aftermarket overdrive to the tailshaft on the 400. That essentially gave him 6 gears. That should be plenty. Good luck, Scott __________________ Silence is golden, duct tape is silver. - Scott

05-13-2003, 08:22 PM	#7
crazy longhorn Fabricate till you "puke" Join Date: Jun 2002 Location: Ill Posts: 9,402	I 2nd that......400 turbo, with a gearvendors OD unit on the back would be the ticket to many happy miles of abuse.....er I mean fun crazyL __________________ 69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears....

05-13-2003, 10:22 AM	#2
case_bt Registered User Join Date: Jan 2002 Location: willis tx Posts: 374	to make it more streetable I'd go with the 700r4

05-13-2003, 10:35 AM	#4
doug72 Registered User Join Date: Mar 2003 Location: Plano, Tx Posts: 59	I am going to use a 700R4 in mine, just because I have it and it is already built. If I was starting again, I would use a 2004R from Phoenix transmissions. They hold more HP than the 700R4 and have a better shift pattern. I have one in my Rs/SS 69 Camaro. I am going to use one behind my LS6 454. Doug

05-13-2003, 09:03 PM	#8
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	And here is the link to there site. http://www.gearvendors.com/commercial.html If you have the cash, the gear vendors (or another brand) is the way to go.



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