5 speed trans swap - The 1947 - Present Chevrolet & GMC Truck Message Board Network

greg0380 · 07-14-2005, 10:21 PM

Right now I've got an 85 small block with a SM465, 2wd. I have an opportunity to score an 89 Cheyenne with a V6 and want to swap the 5 speed, driveshaft and rearend in to my truck. Will the 5 speed bolt up to my small block. I crawled underneath the CHeyenne and the bellhousing looks completely differnt???

Russell · 07-14-2005, 10:52 PM

Hmm, I think that the bellhousings should be the same. I was pretty sure that most chevy engines had the same bellhousing.

greg0380 · 07-15-2005, 07:49 AM

The 5 speed transmission on the '89 chevy looks different than the setup I have on my '85 with the SM465. I am pretty familiar with my bellhousing since I swapped in the 465 a few years ago. It has a bellhousing that bolts to the back of the motor and it holds the hydraulic clutch. the 465 bolts to the back of the bellhousing with 4 large bolts.

The 5 speed on the '89 looks like the bellhousing is part of the transmission. It also has a hydraulic clutch but it isn't in the same spot as the 465 setup. I am going to get the whole truck so I will be able to grab whatever I need. I just wanted to know if the 5 speed will bolt to the back of my '85 small block. thanks.

odee · 07-15-2005, 08:48 AM

the bellhousing on those trannys is part of the case. If it is bolted to the 4.3 it should bolt to your engine. The pads on the rearend may have to be moved along with the shock mounts.

Prerunner1982 · 07-15-2005, 11:18 AM

why would he have to move his spring pads and shock mounts? what am i missing?

SSC's76 · 07-15-2005, 02:38 PM

Quote:

Originally Posted by Prerunner1982

why would he have to move his spring pads and shock mounts? what am i missing?

Should be the same as far as the spring pads, The newer truck uses a different shock but I cant remember if it was the bottem eyelet or the top that differed. Either way 5 minute fix. Axles are longer since the newer truck will use a different offset rim then our trucks use. So if you use your 73-87 rims the back tires will stick out like an inch more.

Prerunner1982 · 07-15-2005, 04:23 PM

helps to read the whole post.... i failed to see the driveshaft and rear end...

07-14-2005, 10:21 PM	#1
greg0380 Registered User Join Date: Dec 2003 Location: CT Posts: 454	5 speed trans swap Right now I've got an 85 small block with a SM465, 2wd. I have an opportunity to score an 89 Cheyenne with a V6 and want to swap the 5 speed, driveshaft and rearend in to my truck. Will the 5 speed bolt up to my small block. I crawled underneath the CHeyenne and the bellhousing looks completely differnt??? __________________ 1985 GMC Sierra 1500, 1/2 ton, 2WD, LWB, TBI 305 5 speed, 3.42 rear 2007 GMC Sierra 1500, xtended cab, 4X4, flexfuel 5.3L 1999 BMW 528i

07-14-2005, 10:52 PM	#2
Russell Professional Grade Join Date: May 2003 Location: Fort McMurray, Alberta Posts: 7,915	Hmm, I think that the bellhousings should be the same. I was pretty sure that most chevy engines had the same bellhousing. __________________ 1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap)

07-15-2005, 07:49 AM	#3
greg0380 Registered User Join Date: Dec 2003 Location: CT Posts: 454	The 5 speed transmission on the '89 chevy looks different than the setup I have on my '85 with the SM465. I am pretty familiar with my bellhousing since I swapped in the 465 a few years ago. It has a bellhousing that bolts to the back of the motor and it holds the hydraulic clutch. the 465 bolts to the back of the bellhousing with 4 large bolts. The 5 speed on the '89 looks like the bellhousing is part of the transmission. It also has a hydraulic clutch but it isn't in the same spot as the 465 setup. I am going to get the whole truck so I will be able to grab whatever I need. I just wanted to know if the 5 speed will bolt to the back of my '85 small block. thanks. __________________ 1985 GMC Sierra 1500, 1/2 ton, 2WD, LWB, TBI 305 5 speed, 3.42 rear 2007 GMC Sierra 1500, xtended cab, 4X4, flexfuel 5.3L 1999 BMW 528i

07-15-2005, 11:18 AM	#5
Prerunner1982 Registered User Join Date: Oct 2002 Location: Edmond, OK Posts: 5,904	why would he have to move his spring pads and shock mounts? what am i missing? __________________ Jon 1982 Chevy Silverado 350/th350.... RETIRED 1993 Jeep XJ 2 door(Cherokee) 4wd 4.0ltr/AX-15 (5spd)/NP231 .... Oklahoma Roll Call

07-15-2005, 08:48 AM	#4
odee Registered User Join Date: Nov 2004 Location: big stone gap va Posts: 83	the bellhousing on those trannys is part of the case. If it is bolted to the 4.3 it should bolt to your engine. The pads on the rearend may have to be moved along with the shock mounts.

07-15-2005, 04:23 PM	#7
Prerunner1982 Registered User Join Date: Oct 2002 Location: Edmond, OK Posts: 5,904	helps to read the whole post.... i failed to see the driveshaft and rear end...



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