Why I Like My 700R4 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Project1970 · 12-05-2002, 03:09 PM

Managed to snag this a little while back...upped the brightness/contrast so it's readable, my gauges aren't normally that bright (but the tach is considerably brighter)

Project1970 · 12-05-2002, 03:10 PM

Okay, it's a little hard to see, but that's 80mph at 2500RPM. With a 3.73 rear.

70c10 · 12-05-2002, 03:25 PM

You're almost as bad as Andy doing 100 taking a pic!

Long Knight · 12-05-2002, 03:25 PM

Hey, I think I see your fuel gauge moving!LOL I'm usually running 2500rpm at about 55mph.

Tynee · 12-05-2002, 03:47 PM

Okay, you convinced me. Actually, I've known all along that's what I wanted behind my 307, But I think its more important that I get enough sheet metal on the thing to keep me dry on days like this before I start tinkering for the fun of it. Maybe I'm wrong.

busterwivell · 12-05-2002, 05:07 PM

Man, I live my 700R4! I went out on the freeway this AM and got up to 65 and was at 2500RPM. Used to be 3500! I can hear the radio at 65 MPH now!

Low68 · 12-05-2002, 05:10 PM

Mine is around 2600 at 90 mph. They are sure nice. I didn't take a pic though.

mtdave2 · 12-05-2002, 05:14 PM

im with ya.. they are great.....when they work... and last more than a year! dam things are really tempermental!

crazy longhorn · 12-05-2002, 05:27 PM

Way to fly........my old longhorn is spinnin 4000 rpms on a 28" tire to keep up with the truckers on the hyway. They run right at 80 mph through Illinois......

Ackattack · 12-05-2002, 06:13 PM

does any one on here have a t-56. Double OD. In my car at 70 I turn like 1600 RPMS

with 3.42 gears

Project1970 · 12-05-2002, 06:43 PM

Not in my truck...my brother has one in his '94 Z28 though. Very sweet.

**tkeduk8r** · 12-05-2002, 08:38 PM

howd you mount your tach on the column with the auto???? or deos it move when you shift from park to R to D?????
--mike

Longhorn Man · 12-06-2002, 01:16 AM

Just clamp it on behinde the shifter collar. (no overdrive...3.07 gear with 28 inch tire....I need more RPM for this motor, it bogs at this low an RPM)

Project1970 · 12-06-2002, 03:35 AM

Quote:

Originally posted by longhornmail
Just clamp it on behinde the shifter collar. (no overdrive...3.07 gear with 28 inch tire....I need more RPM for this motor, it bogs at this low an RPM)

No, you need more motor.

ChevLoRay · 12-06-2002, 01:42 PM

Do I see 1500 RPM's at about 75MPH? Not too shabby. I, too, want to replace my TH400 with a T700. My transmission shop buddy says he can do the whole job, driven out the door, for about $1300, including all the peripherals AND a one-year warranty. How does this compare to your costs?

Oh, by the way, waaaaaaay back in late '70, one of the guys in my shop (I was stationed at DM) got clocked (and ticketed) for driving 137MPH on I-10 through Tucson. He was in a new '71 Mustang with the HO351 and a 4-speed, TRYING to catch his girlfriend who was in her '70 Eldorado! He paid the ticket ($350 in '70), and never let the USAF know about it....avoided the double-jeopardy that it would have brought. I don't know how many RPM's that engine was turning.

Longhorn Man · 12-06-2002, 01:54 PM

Project1970, she has plenty of motor...but it is a top end engine that is lazy below 2800 RPM. Once you hit that engine speed, she comes alive.
And with that said, this engine actually gets better gas mileage at higher RPMs. When it was in the old longhorn I would be spinning it 3000 every day on the highway...which was about 70-ish. I was gettting 14 MPG consistanlty...enter same engine/tranny into a smaller lighter truck with 3.07 gears...and my MPG goes into the crapper, normally into the single digits.
She needs more RPM.

lukecp · 12-06-2002, 02:53 PM

I was going to get a 700R4 to replace the dying TH350 my truck had. It would have cost me about $1200 for the tranny and conversion. A bought a rebuilt TH350 and had it installed for a little over $500. The 700R4 would have taken many years to make up the extra $700 in fuel savings. I have 3.07 gears in it now, and it cruises 65 right at 2500 RPMs with a 27 inch tire. I have drove vehicles with the 700R4/4L60E, and while admit that the low first gear and OD is great, i didn't think they were worth the extra money, for my truck anyway.

Project1970 · 12-06-2002, 03:42 PM

Quote:

Originally posted by ChevLoRay
Do I see 1500 RPM's at about 75MPH? Not too shabby. I, too, want to replace my TH400 with a T700. My transmission shop buddy says he can do the whole job, driven out the door, for about $1300, including all the peripherals AND a one-year warranty. How does this compare to your costs?

My transmission was about $800 IIRC from PhoenixHardParts.com, including a shift kit, torque converter, and the core fee...add to that Red Line synthetic (nearly $100! ouch), a tranny cooler ($45), and a lot of miscellaneous parts, and $1300 installed sounds like a nice, very fair price, especially with a warranty like that. Just make sure the core is an '87-up version.

12-05-2002, 03:09 PM	#1
Project1970 14.1 @ 96MPH Join Date: Jul 2001 Location: Mesa, AZ Posts: 2,811	Why I Like My 700R4 Managed to snag this a little while back...upped the brightness/contrast so it's readable, my gauges aren't normally that bright (but the tach is considerably brighter) Attached Images __________________ Project1970 - LS1 Swap Complete!

12-05-2002, 03:10 PM	#2
Project1970 14.1 @ 96MPH Join Date: Jul 2001 Location: Mesa, AZ Posts: 2,811	Okay, it's a little hard to see, but that's 80mph at 2500RPM. With a 3.73 rear. __________________ Project1970 - LS1 Swap Complete!

12-05-2002, 03:25 PM	#3
70c10 67-72 Addict! Join Date: Feb 2002 Location: The TAX State! Posts: 7,857	You're almost as bad as Andy doing 100 taking a pic! __________________ Jim 1970 C/10 Fleetside w/Ghost Flames Lowered 4.5" front and 4" rear (Raked) 355/350 Turbo w/shift kit 10" Redneck Performance Verter w/2500 stall Hooker Super Comps part#2808-1 Performer RPM Air-Gap 12 Bolt w/3:73 gears- Eaton Posi Comp Cams XE262 with 1.6 Crane Energizers, Road Demon 625 and Brodix IK 180 heads

12-05-2002, 03:25 PM	#4
Long Knight Spank 'em if you got 'em! Join Date: Nov 2002 Location: Kansas City Posts: 628	Hey, I think I see your fuel gauge moving!LOL I'm usually running 2500rpm at about 55mph. __________________ Long Knight '71 C-20, 350ci, TH350, Edl. 1406 Carb w/elec.choke, Ignitor ignition, Viper Tires, Orange Dipstick

12-05-2002, 03:47 PM	#5
Tynee I miss this truck. Join Date: Dec 2001 Location: Lexington, KY U.S.A. Posts: 2,863	Okay, you convinced me. Actually, I've known all along that's what I wanted behind my 307, But I think its more important that I get enough sheet metal on the thing to keep me dry on days like this before I start tinkering for the fun of it. Maybe I'm wrong. __________________ '07 GMC Acadia SLT. Sweet ride. '08 Crew Cab Z-71 short bed. Really like this truck A LOT.

12-05-2002, 05:07 PM	#6
busterwivell Registered User Join Date: Jan 2002 Location: Sahuarita, AZ USA Posts: 2,033	Man, I live my 700R4! I went out on the freeway this AM and got up to 65 and was at 2500RPM. Used to be 3500! I can hear the radio at 65 MPH now! __________________ Bill - Tucson, AZ 47 Chevrolet 2 dr sedan 56 Chevrolet 210 2 dr sedan 66 Chevrolet Malibu 2 dr 4 speed 71 Chevrolet C30 Longhorn 86 Chevrolet Monte Carlo SS (Sold) 01 Chevrolet Tahoe IM - BUSTERWIVE@aol.com

12-05-2002, 05:10 PM	#7
Low68 Registered User Join Date: May 2001 Location: Arizona Posts: 758	Mine is around 2600 at 90 mph. They are sure nice. I didn't take a pic though. __________________ Build Thread

12-05-2002, 05:14 PM	#8
mtdave2 newly minted old timer Join Date: Dec 1999 Location: Hudson WI Posts: 3,508	im with ya.. they are great.....when they work... and last more than a year! dam things are really tempermental! __________________ ____________________________________________ 72 c20 longhorn 65k org miles and counting! 69 k10 Suburban

12-05-2002, 05:27 PM	#9
crazy longhorn Fabricate till you "puke" Join Date: Jun 2002 Location: Ill Posts: 9,403	Way to fly........my old longhorn is spinnin 4000 rpms on a 28" tire to keep up with the truckers on the hyway. They run right at 80 mph through Illinois...... __________________ 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....

12-05-2002, 06:13 PM	#10
Ackattack Senior Member Join Date: Aug 2002 Location: Valley Center KS Posts: 3,525	does any one on here have a t-56. Double OD. In my car at 70 I turn like 1600 RPMS with 3.42 gears __________________ Project Bruiser: 68 Pro-Touring C-10 5.3L / 4L60E Project Ironhide: 97 GMC Crew Cab 4x4 Cummins SOLD: '69 GMC 1/2T SWB TBI'd: Project No Buck Assembly Manual Index Sign up Thread!!! Factory Service Manual Index

12-05-2002, 06:43 PM	#11
Project1970 14.1 @ 96MPH Join Date: Jul 2001 Location: Mesa, AZ Posts: 2,811	Not in my truck...my brother has one in his '94 Z28 though. Very sweet. __________________ Project1970 - LS1 Swap Complete!

12-05-2002, 08:38 PM	#12
tkeduk8r Senior Member Join Date: Apr 2001 Location: Alexandria, MN Posts: 1,462	howd you mount your tach on the column with the auto???? or deos it move when you shift from park to R to D????? --mike __________________ 63 C20 2WD, 230/SM420/4.11 73K 68 C30 dump truck, 327,SM425,4.56 66K original 68 C10 2WD SWB Stepper, 250/3-tree/3.73 66K.... Wifes 68 Buick Skylark Custom Conv., 350/TH400/2.56 In our family since '79 69 GMC 1500 SWB 2WD, 350/TH350/3.73 posi... 70 K10 SWB 4X4 4-sp,ps, pb, tilt, buckets, console, sliding back window (Need AC parts) WIP 72 Chevy K20 4x4 350/350/205/4.56 donor 72 Vette 350/M21/3.70 posi, triple black and super fast 84 Olds Cutlass Brougham 350/2004r/4.11 was Dad's

12-06-2002, 01:16 AM	#13
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Just clamp it on behinde the shifter collar. (no overdrive...3.07 gear with 28 inch tire....I need more RPM for this motor, it bogs at this low an RPM)

12-06-2002, 01:42 PM	#15
ChevLoRay Old Skool Club Join Date: Jun 2001 Location: Benton, AR "The Heart of Arkansas" Posts: 10,880	Do I see 1500 RPM's at about 75MPH? Not too shabby. I, too, want to replace my TH400 with a T700. My transmission shop buddy says he can do the whole job, driven out the door, for about $1300, including all the peripherals AND a one-year warranty. How does this compare to your costs? Oh, by the way, waaaaaaay back in late '70, one of the guys in my shop (I was stationed at DM) got clocked (and ticketed) for driving 137MPH on I-10 through Tucson. He was in a new '71 Mustang with the HO351 and a 4-speed, TRYING to catch his girlfriend who was in her '70 Eldorado! He paid the ticket ($350 in '70), and never let the USAF know about it....avoided the double-jeopardy that it would have brought. I don't know how many RPM's that engine was turning. __________________ Member Nr. 2770 '96 GMC Sportside; 4.3/SLT - Daily driven....constantly needs washed. '69 C-10 SWB; 350/TH400 - in limbo The older I get, the better I was.

12-06-2002, 01:54 PM	#16
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Project1970, she has plenty of motor...but it is a top end engine that is lazy below 2800 RPM. Once you hit that engine speed, she comes alive. And with that said, this engine actually gets better gas mileage at higher RPMs. When it was in the old longhorn I would be spinning it 3000 every day on the highway...which was about 70-ish. I was gettting 14 MPG consistanlty...enter same engine/tranny into a smaller lighter truck with 3.07 gears...and my MPG goes into the crapper, normally into the single digits. She needs more RPM.



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12-06-2002, 02:53 PM	#17
lukecp Formerly yellow72custom Join Date: May 2001 Location: Austin, TX Posts: 7,531	I was going to get a 700R4 to replace the dying TH350 my truck had. It would have cost me about $1200 for the tranny and conversion. A bought a rebuilt TH350 and had it installed for a little over $500. The 700R4 would have taken many years to make up the extra $700 in fuel savings. I have 3.07 gears in it now, and it cruises 65 right at 2500 RPMs with a 27 inch tire. I have drove vehicles with the 700R4/4L60E, and while admit that the low first gear and OD is great, i didn't think they were worth the extra money, for my truck anyway. __________________ '72 Chevy C10 Mild 350/TH350/3.07. Ochre/White. Old high school ride. '70 GMC C2500 '62 327 4bbl/SM465/4.56-geared Dana 60. White/White. Project or parts truck. '97 Saturn SL DD. 1.9/5-speed. 40+ highway mpg

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