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#1 |
Registered User
Join Date: Aug 2001
Location: Cherryville, NC
Posts: 147
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Transmission swap?
I have 70 1/2 which had a TH350. When swaping to the 700R4 will there be any clearance problems with the cab?
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Ken Smith 99 C5 Torch Red Coupe 85 Chevy Candy Apple 70 Chevy 1/2 in process.Semi-gloss black powdercoated frame & suspension, disc brakes up front, 3" drop spindle(Beltech) 5 lug 3.73 rearend, ZZ4, Sanderson headers, 700R4, Air Ride system, Summitt 16 gal fuel cell, Holly mech. fuel pump, |
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#2 |
Registered User
Join Date: May 2000
Location: Frankfort, Kentucky, USA
Posts: 2,163
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You have a high or low hump cab?
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'69 CST Short fleetside Lowered, 400 small block, 700R4, 4 wheel disc brakes, front sway bar & rear camaro sway bar (in progress) '87 V10 4x4 Short Fleetside Quad Suspension and Dual Tanks |
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#3 |
Registered User
Join Date: Aug 2001
Location: Cherryville, NC
Posts: 147
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How can u tell which hump is low or high?
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Ken Smith 99 C5 Torch Red Coupe 85 Chevy Candy Apple 70 Chevy 1/2 in process.Semi-gloss black powdercoated frame & suspension, disc brakes up front, 3" drop spindle(Beltech) 5 lug 3.73 rearend, ZZ4, Sanderson headers, 700R4, Air Ride system, Summitt 16 gal fuel cell, Holly mech. fuel pump, |
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#4 |
Registered User
Join Date: Dec 2000
Location: Centerville Ga. USA
Posts: 804
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If you haven't seen one then, well ...
If the truck is a 4x4 or a Big block then it should have the high hump. All others are low hump
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68 SWB The Surgeon General doesn't say anything about smoking a Ford!!! Would rather be ran over repeatedly by a Chevy than drive a Ford!!! Paralyzed from the neck up and confined to a hat! Kathleen, Georgia USA |
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#5 |
Registered User
Join Date: Aug 2001
Location: escondido, ca 92026
Posts: 1,222
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mines'a low hump with a 350 mounted in the front set of frame holes.... no clearance problems with the 700...
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'72 short step, 350, 700R4, tilt, ps, pdb, a/c, lowered coils, etc., other work in progress... San Diego, CA 72 Stepside Project |
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#6 |
Fabricate till you "puke"
Join Date: Jun 2002
Location: Ill
Posts: 9,403
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My longhorn was a 350/with 400 turbo & a low hump,no problems. If you are mounted in 6 cyl position(stands), it might be tight.........Al
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#7 |
Registered User
Join Date: Aug 2001
Location: Cherryville, NC
Posts: 147
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Thanks for the info. The truck is 2 wheel. I just bought a 700 and wanted to make sure since it will be a while for the cab will be put back on.
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Ken Smith 99 C5 Torch Red Coupe 85 Chevy Candy Apple 70 Chevy 1/2 in process.Semi-gloss black powdercoated frame & suspension, disc brakes up front, 3" drop spindle(Beltech) 5 lug 3.73 rearend, ZZ4, Sanderson headers, 700R4, Air Ride system, Summitt 16 gal fuel cell, Holly mech. fuel pump, |
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#8 |
Registered User
Join Date: May 2000
Location: Frankfort, Kentucky, USA
Posts: 2,163
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I had a cab off a 68 truck on my 69 frame while I had my 700 installed. There was a really slight clearance problem with one lip that protruded from the cab. It was in the trans-hump area. The rub was so slight that it may have just been limited to my cab being stamped odd. But now I have a 69 cab with a big hump. Zero problems.
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'69 CST Short fleetside Lowered, 400 small block, 700R4, 4 wheel disc brakes, front sway bar & rear camaro sway bar (in progress) '87 V10 4x4 Short Fleetside Quad Suspension and Dual Tanks |
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#9 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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The 4 speed trucks had high humps, and aperantly (although not documented) the V-6/TH400 GMCs had high humps too.
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#10 |
Registered User
![]() Join Date: Apr 2000
Location: Bradenton, FL
Posts: 1,036
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I have a 402 and a 700R4 in a 70 low hump and theres plenty of room. If you have a clereance problem you might want to check your cab mounts.
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1970 CST/10 402,700R4,3:73 posi,AC,PS,PB,TLT,PW,Buckets with heaters |
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#11 |
Registered User
Join Date: Jul 2002
Location: Cedar Hill, MO
Posts: 426
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My low hump cab with 700R tranny has plenty of room also.
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1969 Chevy C10. Dakota Digital Gauges, 383 Votex Engine, MSD 8361 Distributor, MSD 6A Unit, Demon Carb, Phoenix Transmission 4L80E trans, 3:73 Posi Rear End Early Classics 6 Lug Disc Brakes and Spindles All Stainless Lines |
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#12 | |
Registered User
Join Date: Mar 2002
Location: Agua Dulce, Ca. usa
Posts: 179
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Quote:
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Ed ke6bnl Agua Dulce 70 S.E. Los Angeles 70 Chevy short bed 1948 F3 ford pu 1949 F1 stock V8 flathead 3 on floor 1950 F1 pu street rod 1948 F6 Ford Dually/350sbc no bed stock trans&rear 1972 El Camino 4" chop 1953 Chevy 3100 2b daily driver 1970 SB 4X4 400ci 6in lift |
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#13 |
Fabricate till you "puke"
Join Date: Jun 2002
Location: Ill
Posts: 9,403
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Mounted in 6/250 position, you may have to cut the lip off the bottom of the cab(across the trans tunnel). i think the rest will clear,but will be tight. My 69 also has a body drop, so it needed the trans tunnel reworked.Good luck.....Al
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#14 |
Registered User
Join Date: May 2000
Location: Frankfort, Kentucky, USA
Posts: 2,163
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I had the same problem as crazylonghorn, but my truck was a 307 originally
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'69 CST Short fleetside Lowered, 400 small block, 700R4, 4 wheel disc brakes, front sway bar & rear camaro sway bar (in progress) '87 V10 4x4 Short Fleetside Quad Suspension and Dual Tanks |
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#15 |
Registered User
Join Date: Oct 2001
Location: Grapevine, Tx.
Posts: 2,142
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check out this article on converting a low hump floor to high hump.
It might save you some clearence problems in the future and what the heck while you got it apart. http://www.earlyclassic.com/68rodsto...ec2000pg6.html
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John Hutchison Grapevine,Texas 68 1/2 t swb 68 Mustang 69 Jaguar 71 1/2 t swb 88 Supra CompTs6m 93 Escort GT 2005 Corolla XRS |
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#16 |
Registered User
Join Date: Oct 2008
Location: CALGARY, ALBERTA
Posts: 62
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Re: Transmission swap?
Can anybody tell me if the high hump trucks were factory big blocks? And another question, which tranny is a better swap the 700r4 or the NV4500?
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#17 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Re: Transmission swap?
this is the second 7 YEAR OLD THREAD to pop up this week!
High humps came in; all 4X4 trucks All 4 speed trucks All big blocks that had a 4 speed or automatic. As for the tranny question, the 4500 is probably stronger, but the 700 can be built stronger, the 700 can be installed with less work, and possibly cheaper. |
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#18 |
1970 C10
Join Date: Dec 2007
Location: Cleveland Ohio
Posts: 212
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Re: Transmission swap?
i just got a 700r4, and origianlly had the 3 speed, i cut out the old tranny crossmember and got a new one from CPP, but am now unsure where i mount it, since i have the motor out being rebuilt.
anyone have any pictures? Thanks! |
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#19 |
Registered User
Join Date: Oct 2008
Location: CALGARY, ALBERTA
Posts: 62
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Re: Transmission swap?
I really want to stay with a standard. 5 speed would be great for the rpms, and no patching the floor.
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