700R4 from 4x4 into 2WD? I have some questions!!!!!!!! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

74Chevy74 · 12-01-2005, 04:47 PM

Ok I just found a guy selling a 700R4 from an 88 Suburban 4X4 for a good deal. I know these have a transfer case so does anyone know if I can make this work in my 74 2WD? I know I'd have to pull of the transfer case off but then whatr? I want to do the swap eventually and thought this might be the time to pick up the tranny but I just thought I'd post here before I buy it. I searched for 700R4 stuff on here but didn't find anything about this....Help???
Thanks guys....

**Captkaos** · 12-01-2005, 05:20 PM

You will have to pull it completely apart and get a 2WD tailhousing and ouput shaft and put it back together. More trouble than it is worth in my opinion. How good a deal is it?

SlapFish · 12-01-2005, 05:39 PM

Provided it's original to the truck, it's a later model 700R4...which is good. They're considered more reliable. It may be worth it if you have the ability to make it a 2WD transmission without too much expense.

79BIG10 · 12-01-2005, 06:24 PM

Also you may have to get a different driveshaft to fit the tranny's new length w/o the trasnfer case.

74Chevy74 · 12-01-2005, 07:32 PM

Sounds like too much of a pain to me? The guy want's $350 for it but considering I'd have to buy other part's forget it, I'll find one that's ready to bolt up. Thanks for the info.... by chance what do you think the parts would cost to do that?

SlapFish · 12-01-2005, 10:37 PM

If you have a 700R4 in the 2WD truck you can just bolt one right in place. If not you need a new driveshaft, and I believe the mount on the crossmember is different.

kevinr1970 · 12-02-2005, 01:37 AM

For the sake of argument, what would stop a person from mounting a 4x4 tranny/transfer case in a 2wd truck and just never mounting anything to the front?
I understand there might be some clearence issues from the ground but if you needed a tranny and you had a stock height truck, couldn't you just mount the crossmember and transfer case?
I had the chance to buy a 1ton flatbed a while back with a bad tranny but missed it. At the time I had a T400/208(?) transfer case and wondered why I couldn't do just that and have essentially a 2 speed gearbox.

79BIG10 · 12-02-2005, 02:10 AM

Quote:

Originally Posted by kevinr1970

For the sake of argument, what would stop a person from mounting a 4x4 tranny/transfer case in a 2wd truck and just never mounting anything to the front?
I understand there might be some clearence issues from the ground but if you needed a tranny and you had a stock height truck, couldn't you just mount the crossmember and transfer case?
I had the chance to buy a 1ton flatbed a while back with a bad tranny but missed it. At the time I had a T400/208(?) transfer case and wondered why I couldn't do just that and have essentially a 2 speed gearbox.

Good idea but I think that you would have trouble with the front d/s. I'm not sure but I think you would have trouble in sealing up the front seal without a d/s there. They may hook up different that on the rear d/s. But if it would work then would be a good idea.

kevinr1970 · 12-02-2005, 03:20 PM

On my '86 Diesel I never had a front DS from the day I bought it.
This was a 700/208 so it might be different for the heavier transfer cases.

jermasaurus · 12-02-2005, 09:36 PM

$350 is pretty steep for the trans in my opinion, especially if it has never been rebuilt. Maybe a 4x4 one is more money for some reason?
I think you could probably get a 700r4 at a junkyard with at least a 60 day exchange for no more than $200.

If you currently have a 350 trans with a 9" tailshaft, the driveshaft legnth should be fine.
-Jeremy

12-01-2005, 04:47 PM	#1
74Chevy74 Registered User Join Date: Nov 2005 Location: San Jose, California Posts: 167	700R4 from 4x4 into 2WD? I have some questions!!!!!!!! Ok I just found a guy selling a 700R4 from an 88 Suburban 4X4 for a good deal. I know these have a transfer case so does anyone know if I can make this work in my 74 2WD? I know I'd have to pull of the transfer case off but then whatr? I want to do the swap eventually and thought this might be the time to pick up the tranny but I just thought I'd post here before I buy it. I searched for 700R4 stuff on here but didn't find anything about this....Help??? Thanks guys....

12-01-2005, 05:20 PM	#2
Captkaos www.73-87chevytrucks.com Join Date: Dec 1999 Location: Birmingham, AL Posts: 6,935	Re: 700R4 from 4x4 into 2WD? I have some questions!!!!!!!! You will have to pull it completely apart and get a 2WD tailhousing and ouput shaft and put it back together. More trouble than it is worth in my opinion. How good a deal is it? __________________ Chris Lucas 1973 Chevy C-10 1978 GMC Jimmy (2WD) - SOLD 1987 R10 twin turbo LS 1991 R3500 SRW CrewCab 1985 K5 diesel swapped project 1989 K5 2WD conversion w/ Vette susp Project Captkaos Customs 73-87chevytrucks.com

12-01-2005, 05:39 PM	#3
SlapFish Real Men Wear Orange Join Date: Oct 2005 Location: NC Posts: 89	Re: 700R4 from 4x4 into 2WD? I have some questions!!!!!!!! Provided it's original to the truck, it's a later model 700R4...which is good. They're considered more reliable. It may be worth it if you have the ability to make it a 2WD transmission without too much expense.

12-01-2005, 06:24 PM	#4
79BIG10 I'm back with 2nd truck! Join Date: Feb 2002 Location: Texas Posts: 3,774	Re: 700R4 from 4x4 into 2WD? I have some questions!!!!!!!! Also you may have to get a different driveshaft to fit the tranny's new length w/o the trasnfer case. __________________ 1979 Chevrolet Bonanza Big10 "Tootsie Roll" 1985 Chevrolet Silverado (wife's) Member of the Southern Bowties Club "Don't underestimate how sexy a fat man who drinks to excess can be." Homer Simpson

12-01-2005, 07:32 PM	#5
74Chevy74 Registered User Join Date: Nov 2005 Location: San Jose, California Posts: 167	Re: 700R4 from 4x4 into 2WD? I have some questions!!!!!!!! Sounds like too much of a pain to me? The guy want's $350 for it but considering I'd have to buy other part's forget it, I'll find one that's ready to bolt up. Thanks for the info.... by chance what do you think the parts would cost to do that?

12-01-2005, 10:37 PM	#6
SlapFish Real Men Wear Orange Join Date: Oct 2005 Location: NC Posts: 89	Re: 700R4 from 4x4 into 2WD? I have some questions!!!!!!!! If you have a 700R4 in the 2WD truck you can just bolt one right in place. If not you need a new driveshaft, and I believe the mount on the crossmember is different. Last edited by SlapFish; 12-01-2005 at 10:38 PM.

12-02-2005, 01:37 AM	#7
kevinr1970 Senior Member Join Date: Aug 2004 Location: Everett, WA Posts: 2,316	Re: 700R4 from 4x4 into 2WD? I have some questions!!!!!!!! For the sake of argument, what would stop a person from mounting a 4x4 tranny/transfer case in a 2wd truck and just never mounting anything to the front? I understand there might be some clearence issues from the ground but if you needed a tranny and you had a stock height truck, couldn't you just mount the crossmember and transfer case? I had the chance to buy a 1ton flatbed a while back with a bad tranny but missed it. At the time I had a T400/208(?) transfer case and wondered why I couldn't do just that and have essentially a 2 speed gearbox. __________________ 2009 Honda Fit CfC (bsf 44.9 mpg) 2000 Tahoe Limited 1991 GMC CrewCab Dually 2wd, will end up swb, not dually and replace CCswb below 1991 GMC CrewCab Dually 4x4, just going to fix things up for now 1982/1989 K5/GMC Jimmy 2wd 1987 GMC 1/2 ton swb 2wd Crew (sold)

12-02-2005, 03:20 PM	#9
kevinr1970 Senior Member Join Date: Aug 2004 Location: Everett, WA Posts: 2,316	Re: 700R4 from 4x4 into 2WD? I have some questions!!!!!!!! On my '86 Diesel I never had a front DS from the day I bought it. This was a 700/208 so it might be different for the heavier transfer cases. __________________ 2009 Honda Fit CfC (bsf 44.9 mpg) 2000 Tahoe Limited 1991 GMC CrewCab Dually 2wd, will end up swb, not dually and replace CCswb below 1991 GMC CrewCab Dually 4x4, just going to fix things up for now 1982/1989 K5/GMC Jimmy 2wd 1987 GMC 1/2 ton swb 2wd Crew (sold)

12-02-2005, 09:36 PM	#10
jermasaurus Registered User Join Date: Dec 2004 Location: New Lenox, IL Posts: 442	Re: 700R4 from 4x4 into 2WD? I have some questions!!!!!!!! $350 is pretty steep for the trans in my opinion, especially if it has never been rebuilt. Maybe a 4x4 one is more money for some reason? I think you could probably get a 700r4 at a junkyard with at least a 60 day exchange for no more than $200. If you currently have a 350 trans with a 9" tailshaft, the driveshaft legnth should be fine. -Jeremy



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