700R4 housings? Different in 4x4 and 2wd?? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

kanuck · 08-04-2011, 03:02 AM

Was wondering if you can add a tail housing to a 4x4 tranny to be able to use it in a 2wd truck?
Also, what is the difference in electronic speedo and cable? Do you just ad an adaptor?
Thanks for any info....

Hagen

motornut · 08-04-2011, 06:43 AM

these are the different sizes

BigBlocksRule · 08-04-2011, 08:08 AM

Tailhousings are different as are output shafts. Both can be swapped without tearing the entire tranny down. Two different configurations for speedo, one uses a plastic gear (mechanical) and the electronic version uses a magnetic reluctor wheel. Both go on the same place on the output shaft. Ask your tranny guy for sure about this when you swap the output shaft and tailhousing.

Also, make sure you're running one of the later 700's ('89 and up, IIRC). Easy way to identify the case is that the case casting line runs right through one (or both?) bosses for coolant lines, the earlier ones miss it completely.

08-04-2011, 03:02 AM	#1
kanuck Registered User Join Date: Dec 2005 Location: canada Posts: 166	700R4 housings? Different in 4x4 and 2wd?? Was wondering if you can add a tail housing to a 4x4 tranny to be able to use it in a 2wd truck? Also, what is the difference in electronic speedo and cable? Do you just ad an adaptor? Thanks for any info.... Hagen __________________ '70 Malibu with 383 stroker/T350 '56 SWB Mercury pickup..under construction '67 Firebird Convertible...all done stock '70 LWB 350 on propane...beater '69 LWB 350/T400 body restored

08-04-2011, 06:43 AM	#2
motornut 78K & 79C Jimmys Join Date: Nov 2009 Location: Ottawa Ont CANADA Posts: 7,901	Re: 700R4 housings? Different in 4x4 and 2wd?? these are the different sizes Attached Images __________________ John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350

08-04-2011, 08:08 AM	#3
BigBlocksRule Registered User Join Date: Jun 2008 Location: Lubbock, TX Posts: 2,047	Re: 700R4 housings? Different in 4x4 and 2wd?? Tailhousings are different as are output shafts. Both can be swapped without tearing the entire tranny down. Two different configurations for speedo, one uses a plastic gear (mechanical) and the electronic version uses a magnetic reluctor wheel. Both go on the same place on the output shaft. Ask your tranny guy for sure about this when you swap the output shaft and tailhousing. Also, make sure you're running one of the later 700's ('89 and up, IIRC). Easy way to identify the case is that the case casting line runs right through one (or both?) bosses for coolant lines, the earlier ones miss it completely.

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